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Mahbub KR, Chénard C, Batinovic S, Petrovski S, Lauro FM, Rahman MH, Megharaj M, Franks AE, Labbate M. Complex interactions between diverse mobile genetic elements drive the evolution of metal-resistant bacterial genomes. Environ Microbiol 2023; 25:3387-3405. [PMID: 37915109 DOI: 10.1111/1462-2920.16532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 10/20/2023] [Indexed: 11/03/2023]
Abstract
In this study, we compared the genomes of three metal-resistant bacteria isolated from mercury-contaminated soil. We identified diverse and novel MGEs with evidence of multiple LGT events shaping their genomic structure and heavy metal resistance. Among the three metal-resistant strains, Sphingobium sp SA2 and Sphingopyxis sp SE2 were resistant to multiple metals including mercury, cadmium, copper, zinc and lead. Pseudoxanthomonas sp SE1 showed resistance to mercury only. Whole genome sequencing by Illumina and Oxford Nanopore technologies was undertaken to obtain comprehensive genomic data. The Sphingobium and Sphingopyxis strains contained multiple chromosomes and plasmids, whereas the Pseudoxanthomonas strain contained one circular chromosome. Consistent with their metal resistance profiles, the strains of Sphingobium and Sphingopyxis contained a higher quantity of diverse metal resistance genes across their chromosomes and plasmids compared to the single-metal resistant Pseudoxanthomonas SE1. In all three strains, metal resistance genes were principally associated with various novel MGEs including genomic islands (GIs), integrative conjugative elements (ICEs), transposons, insertion sequences (IS), recombinase in trio (RIT) elements and group II introns, indicating their importance in facilitating metal resistance adaptation in a contaminated environment. In the Pseudoxanthomonas strain, metal resistance regions were largely situated on a GI. The chromosomes of the strains of Sphingobium and Sphingopyxis contained multiple metal resistance regions, which were likely acquired by several GIs, ICEs, numerous IS elements, several Tn3 family transposons and RIT elements. Two of the plasmids of Sphingobium were impacted by Tn3 family transposons and ISs likely integrating metal resistance genes. The two plasmids of Sphingopyxis harboured transposons, IS elements, an RIT element and a group II intron. This study provides a comprehensive annotation of complex genomic regions of metal resistance associated with novel MGEs. It highlights the critical importance of LGT in the evolution of metal resistance of bacteria in contaminated environments.
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Affiliation(s)
- Khandaker Rayhan Mahbub
- School of Life Sciences, University of Technology Sydney, Ultimo, New South Wales, Australia
| | - Caroline Chénard
- Asian School for the Environment, Nanyang Technological University, Singapore, Singapore
| | - Steven Batinovic
- Division of Materials Science and Chemical Engineering, Yokohama National University, Yokohama, Kanagawa, Japan
| | - Steve Petrovski
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Victoria, Australia
- Centre for Future Landscapes, La Trobe University, Bundoora, Victoria, Australia
| | - Federico M Lauro
- Asian School for the Environment, Nanyang Technological University, Singapore, Singapore
- Singapore Centre for Environmental Life Sciences Engineering/Nanyang Technological University, Singapore, Singapore
- Nanyang Environment & Water Research Institute (NEWRI), Nanyang Technological University, Singapore, Singapore
| | - Md Hafizur Rahman
- School of Life Sciences, University of Technology Sydney, Ultimo, New South Wales, Australia
| | - Mallavarapu Megharaj
- Global Centre for Environmental Remediation, College of Engineering, Science and Environment, The University of Newcastle, Callaghan, Australia
- Cooperative Research Centre for Contamination Assessment and Remediation of Environment, The University of Newcastle (UoN), Callaghan, New South Wales, Australia
| | - Ashley E Franks
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Victoria, Australia
- Centre for Future Landscapes, La Trobe University, Bundoora, Victoria, Australia
| | - Maurizio Labbate
- School of Life Sciences, University of Technology Sydney, Ultimo, New South Wales, Australia
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Carter DJ, Byrne MK, Djordjevic SP, Robertson H, Labbate M, Morgan BS, Billington L. Personal Data for Public Benefit: The Regulatory Determinants of Social Licence for Technologically Enhanced Antimicrobial Resistance Surveillance. J Law Med 2023; 30:179-190. [PMID: 37271958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Technologically enhanced surveillance systems have been proposed for the task of monitoring and responding to antimicrobial resistance (AMR) in both human, animal and environmental contexts. The use of these systems is in their infancy, although the advent of COVID-19 has progressed similar technologies in response to that pandemic. We conducted qualitative research to identify the Australian public's key concerns about the ethical, legal and social implications of an artificial intelligence (AI) and machine learning-enhanced One Health AMR surveillance system. Our study provides preliminary evidence of public support for AI/machine learning-enhanced One Health monitoring systems for AMR, provided that three main conditions are met: personal health care data must be deidentified; data use and access must be tightly regulated under strong governance; and the system must generate high-quality, reliable analyses to guide trusted health care decision-makers.
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Affiliation(s)
| | | | | | - Hamish Robertson
- School of Public Health and Social Work, Queensland University of Technology
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Worden PJ, Bogema DR, Micallef ML, Go J, Deutscher AT, Labbate M, Green TJ, King WL, Liu M, Seymour JR, Jenkins C. Phylogenomic diversity of Vibrio species and other Gammaproteobacteria isolated from Pacific oysters ( Crassostrea gigas) during a summer mortality outbreak. Microb Genom 2022; 8:mgen000883. [PMID: 36748707 PMCID: PMC9837568 DOI: 10.1099/mgen.0.000883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The Pacific oyster (PO), Crassostrea gigas, is an important commercial marine species but periodically experiences large stock losses due to disease events known as summer mortality. Summer mortality has been linked to environmental perturbations and numerous viral and bacterial agents, indicating this disease is multifactorial in nature. In 2013 and 2014, several summer mortality events occurred within the Port Stephens estuary (NSW, Australia). Extensive culture and molecular-based investigations were undertaken and several potentially pathogenic Vibrio species were identified. To improve species identification and genomically characterise isolates obtained from this outbreak, whole-genome sequencing (WGS) and subsequent genomic analyses were performed on 48 bacterial isolates, as well as a further nine isolates from other summer mortality studies using the same batch of juveniles. Average nucleotide identity (ANI) identified most isolates to the species level and included members of the Photobacterium, Pseudoalteromonas, Shewanella and Vibrio genera, with Vibrio species making up more than two-thirds of all species identified. Construction of a phylogenomic tree, ANI analysis, and pan-genome analysis of the 57 isolates represents the most comprehensive culture-based phylogenomic survey of Vibrios during a PO summer mortality event in Australian waters and revealed large genomic diversity in many of the identified species. Our analysis revealed limited and inconsistent associations between isolate species and their geographical origins, or host health status. Together with ANI and pan-genome results, these inconsistencies suggest that to determine the role that microbes may have in Pacific oyster summer mortality events, isolate identification must be at the taxonomic level of strain. Our WGS data (specifically, the accessory genomes) differentiated bacterial strains, and coupled with associated metadata, highlight the possibility of predicting a strain's environmental niche and level of pathogenicity.
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Affiliation(s)
- Paul J. Worden
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle, NSW 2568
| | - Daniel R. Bogema
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle, NSW 2568
| | - Melinda L. Micallef
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle, NSW 2568
| | - Jeffrey Go
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle, NSW 2568
| | - Ania T. Deutscher
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle, NSW 2568
| | - Maurizio Labbate
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
| | - Timothy J. Green
- Centre for Shellfish Research, Vancouver Island University, Nanaimo, British Columbia,, Canada
| | - William L. King
- Department of Plant Pathology and Environmental MIcrobiology, The Pennsylvania State University, University Park, PA 16802, USA
| | - Michael Liu
- iThree Institute, University of Technology Sydney, Building 4, 745 Harris Street, Broadway, Ultimo, NSW, 2007
| | - Justin R. Seymour
- Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, 2007
| | - Cheryl Jenkins
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle, NSW 2568,*Correspondence: Cheryl Jenkins,
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Hoque MM, Noorian P, Espinoza-Vergara G, Manuneedhi Cholan P, Kim M, Rahman MH, Labbate M, Rice SA, Pernice M, Oehlers SH, McDougald D. Adaptation to an amoeba host drives selection of virulence-associated traits in Vibrio cholerae. ISME J 2022; 16:856-867. [PMID: 34654895 PMCID: PMC8857207 DOI: 10.1038/s41396-021-01134-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 09/20/2021] [Accepted: 09/29/2021] [Indexed: 12/02/2022]
Abstract
Predation by heterotrophic protists drives the emergence of adaptive traits in bacteria, and often these traits lead to altered interactions with hosts and persistence in the environment. Here we studied adaptation of the cholera pathogen, Vibrio cholerae during long-term co-incubation with the protist host, Acanthamoeba castellanii. We determined phenotypic and genotypic changes associated with long-term intra-amoebal host adaptation and how this impacts pathogen survival and fitness. We showed that adaptation to the amoeba host leads to temporal changes in multiple phenotypic traits in V. cholerae that facilitate increased survival and competitive fitness in amoeba. Genome sequencing and mutational analysis revealed that these altered lifestyles were linked to non-synonymous mutations in conserved regions of the flagellar transcriptional regulator, flrA. Additionally, the mutations resulted in enhanced colonisation in zebrafish, establishing a link between adaptation of V. cholerae to amoeba predation and enhanced environmental persistence. Our results show that pressure imposed by amoeba on V. cholerae selects for flrA mutations that serves as a key driver for adaptation. Importantly, this study provides evidence that adaptive traits that evolve in pathogens in response to environmental predatory pressure impact the colonisation of eukaryotic organisms by these pathogens.
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Affiliation(s)
- M. Mozammel Hoque
- grid.117476.20000 0004 1936 7611The iThree Institute, University of Technology Sydney, Sydney, NSW Australia
| | - Parisa Noorian
- grid.117476.20000 0004 1936 7611The iThree Institute, University of Technology Sydney, Sydney, NSW Australia
| | - Gustavo Espinoza-Vergara
- grid.117476.20000 0004 1936 7611The iThree Institute, University of Technology Sydney, Sydney, NSW Australia
| | - Pradeep Manuneedhi Cholan
- grid.1013.30000 0004 1936 834XTuberculosis Research Program at the Centenary Institute, The University of Sydney, Camperdown, NSW Australia ,grid.1013.30000 0004 1936 834XFaculty of Medicine and Health & Marie Bashir Institute, The University of Sydney, Camperdown, NSW Australia
| | - Mikael Kim
- grid.117476.20000 0004 1936 7611Climate Change Cluster, University of Technology Sydney, Sydney, NSW Australia
| | - Md Hafizur Rahman
- grid.117476.20000 0004 1936 7611School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW Australia
| | - Maurizio Labbate
- grid.117476.20000 0004 1936 7611School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW Australia
| | - Scott A. Rice
- grid.117476.20000 0004 1936 7611The iThree Institute, University of Technology Sydney, Sydney, NSW Australia ,grid.59025.3b0000 0001 2224 0361Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
| | - Mathieu Pernice
- grid.117476.20000 0004 1936 7611Climate Change Cluster, University of Technology Sydney, Sydney, NSW Australia
| | - Stefan H. Oehlers
- grid.1013.30000 0004 1936 834XTuberculosis Research Program at the Centenary Institute, The University of Sydney, Camperdown, NSW Australia ,grid.1013.30000 0004 1936 834XFaculty of Medicine and Health & Marie Bashir Institute, The University of Sydney, Camperdown, NSW Australia
| | - Diane McDougald
- grid.117476.20000 0004 1936 7611The iThree Institute, University of Technology Sydney, Sydney, NSW Australia ,grid.59025.3b0000 0001 2224 0361Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
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King WL, Siboni N, Kahlke T, Dove M, O'Connor W, Mahbub KR, Jenkins C, Seymour JR, Labbate M. Regional and oyster microenvironmental scale heterogeneity in the Pacific oyster bacterial community. FEMS Microbiol Ecol 2020; 96:5813259. [PMID: 32221598 DOI: 10.1093/femsec/fiaa054] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 03/22/2020] [Indexed: 01/04/2023] Open
Abstract
Different organs of a host represent distinct microenvironments resulting in the establishment of multiple discrete bacterial communities within a host. These discrete bacterial communities can also vary according to geographical location. For the Pacific oyster, Crassostrea gigas, the factors governing bacterial diversity and abundance of different oyster microenvironments are poorly understood. In this study, the factors shaping bacterial abundance, diversity and composition associated with the C. gigas mantle, gill, adductor muscle and digestive gland were characterised using 16S (V3-V4) rRNA amplicon sequencing across six discrete estuaries. Both location and tissue-type, with tissue-type being the stronger determinant, were factors driving bacterial community composition. Bacterial communities from wave-dominated estuaries had similar compositions and higher bacterial abundance despite being geographically distant from one another, possibly indicating that functional estuarine morphology characteristics are a factor shaping the oyster bacterial community. Despite the bacterial community heterogeneity, examinations of the core bacterial community identified Spirochaetaceae bacteria as conserved across all sites and samples. Whereas members of the Vulcaniibacterium, Spirochaetaceae and Margulisbacteria, and Polynucleobacter were regionally conserved members of the digestive gland, gill and mantle bacterial communities, respectively. This indicates that baseline bacterial community profiles for specific locations are necessary when investigating bacterial communities in oyster health.
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Affiliation(s)
- William L King
- University of Technology Sydney, The School of Life Sciences, Ultimo, New South Wales, 2007, Australia.,University of Technology Sydney, Climate Change Cluster, Ultimo, New South Wales, 2007, Australia
| | - Nachshon Siboni
- University of Technology Sydney, Climate Change Cluster, Ultimo, New South Wales, 2007, Australia
| | - Tim Kahlke
- University of Technology Sydney, Climate Change Cluster, Ultimo, New South Wales, 2007, Australia
| | - Michael Dove
- NSW Department of Primary Industries, Port Stephens Fisheries Institute, Port Stephens, New South Wales, 2316, Australia
| | - Wayne O'Connor
- NSW Department of Primary Industries, Port Stephens Fisheries Institute, Port Stephens, New South Wales, 2316, Australia
| | - Khandaker Rayhan Mahbub
- University of Technology Sydney, The School of Life Sciences, Ultimo, New South Wales, 2007, Australia
| | - Cheryl Jenkins
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, New South Wales, 2568, Australia
| | - Justin R Seymour
- University of Technology Sydney, Climate Change Cluster, Ultimo, New South Wales, 2007, Australia
| | - Maurizio Labbate
- University of Technology Sydney, The School of Life Sciences, Ultimo, New South Wales, 2007, Australia
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Mahbub KR, King WL, Siboni N, Nguyen VK, Rahman MM, Megharaj M, Seymour JR, Franks AE, Labbate M. Long-lasting effect of mercury contamination on the soil microbiota and its co-selection of antibiotic resistance. Environ Pollut 2020; 265:115057. [PMID: 32806457 DOI: 10.1016/j.envpol.2020.115057] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 05/11/2020] [Accepted: 06/16/2020] [Indexed: 06/11/2023]
Abstract
Antibiotic resistance genes (ARGs) in the environment are an exposure risk to humans and animals and is emerging as a global public health concern. In this study, mercury (Hg) driven co-selection of ARGs was investigated under controlled conditions in two Australian non-agricultural soils with differing pH. Soils were spiked with increasing concentrations of inorganic Hg and left to age for 5 years. Both soils contained ARGs conferring resistance to tetracycline (tetA, tetB), sulphonamides (sul1), trimethoprim (dfrA1) and the ARG indicator class 1 integron-integrase gene, intI1, as measured by qPCR. The last resort antibiotic vancomycin resistance gene, vanB and quinolone resistance gene, qnrS were not detected. Hg driven co-selection of several ARGs namely intI1, tetA and tetB were observed in the alkaline soil within the tested Hg concentrations. No co-selection of the experimental ARGs was observed in the neutral pH soil. 16S rRNA sequencing revealed proliferation of Proteobacteria and Bacteriodetes in Hg contaminated neutral and alkaline soils respectively. Multivariate analyses revealed a strong effect of Hg, soil pH and organic carbon content on the co-selection of ARGs in the experimental soils. Additionally, although aging caused a significant reduction in Hg content, agriculturally important bacterial phyla such as Nitrospirae did not regrow in the contaminated soils. The results suggest that mercury can drive co-selection of ARGs in contaminated non-agricultural soils over five years of aging which is linked to soil microbiota shift and metal chemistry in the soil.
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Affiliation(s)
| | - William L King
- School of Life Sciences, University of Technology Sydney, Ultimo, NSW, 2007, Australia; Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Nachshon Siboni
- Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Viet Khue Nguyen
- School of Life Sciences, University of Technology Sydney, Ultimo, NSW, 2007, Australia; Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Mohammad Mahmudur Rahman
- Global Centre for Environmental Remediation, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Mallavarapu Megharaj
- Global Centre for Environmental Remediation, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Justin R Seymour
- Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Ashley E Franks
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, 3086, Australia; Centre for Future Landscapes, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Maurizio Labbate
- School of Life Sciences, University of Technology Sydney, Ultimo, NSW, 2007, Australia.
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King WL, Siboni N, Kahlke T, Green TJ, Labbate M, Seymour JR. A New High Throughput Sequencing Assay for Characterizing the Diversity of Natural Vibrio Communities and Its Application to a Pacific Oyster Mortality Event. Front Microbiol 2019; 10:2907. [PMID: 31921078 PMCID: PMC6932961 DOI: 10.3389/fmicb.2019.02907] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 12/03/2019] [Indexed: 01/08/2023] Open
Abstract
The Vibrio genus is notable for including several pathogens of marine animals and humans, yet characterization of Vibrio diversity using routine 16S rRNA sequencing methods is often constrained by poor resolution beyond the genus level. Here, a new high throughput sequencing approach targeting the heat shock protein (hsp60) as a phylogenetic marker was developed to more precisely discriminate members of the Vibrio genus in environmental samples. The utility of this new assay was tested using mock communities constructed from known dilutions of Vibrio isolates. Relative to standard and Vibrio-specific 16S rRNA sequencing assays, the hsp60 assay delivered high levels of fidelity with the mock community composition at the species level, including discrimination of species within the Vibrio harveyi clade. This assay was subsequently applied to characterize Vibrio community composition in seawater and delivered substantially improved taxonomic resolution of Vibrio species compared to 16S rRNA analysis. Finally, this assay was applied to examine patterns in the Vibrio community within oysters during a Pacific oyster mortality event. In these oysters, the hsp60 assay identified species-level Vibrio community shifts prior to disease onset, pinpointing V. harveyi as a putative pathogen. Given that shifts in the Vibrio community can precede, cause, and follow disease onset in numerous marine organisms, there is a need for an accurate high throughput assay for defining Vibrio community composition in natural samples. This Vibrio-centric hsp60 sequencing assay offers the potential for precise high throughput characterization of Vibrio diversity, providing an enhanced platform for dissecting Vibrio dynamics in the environment.
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Affiliation(s)
- William L. King
- School of Life Sciences, University of Technology Sydney, Ultimo, NSW, Australia
- Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, Australia
| | - Nachshon Siboni
- Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, Australia
| | - Tim Kahlke
- Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, Australia
| | - Timothy J. Green
- Centre for Shellfish Research, Vancouver Island University, Nanaimo, BC, Canada
| | - Maurizio Labbate
- School of Life Sciences, University of Technology Sydney, Ultimo, NSW, Australia
| | - Justin R. Seymour
- Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, Australia
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Carney RL, Labbate M, Siboni N, Tagg KA, Mitrovic SM, Seymour JR. Urban beaches are environmental hotspots for antibiotic resistance following rainfall. Water Res 2019; 167:115081. [PMID: 31574348 DOI: 10.1016/j.watres.2019.115081] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 09/09/2019] [Accepted: 09/10/2019] [Indexed: 06/10/2023]
Abstract
To reveal the occurrence and mechanisms for dispersal of antibiotic resistance (AbR) among the microbial assemblages inhabiting impacted coastal environments, we performed a weekly, two-year duration time-series study at two urban beaches between 2014 and 2016. We combined quantitative PCR and multiplex PCR/reverse line blot techniques to track patterns in the occurrence of 31 AbR genes, including genes that confer resistance to antibiotics that are critically important antimicrobials for human medicine. Patterns in the abundance of these genes were linked to specific microbial groups and environmental parameters by coupling qPCR and 16S rRNA amplicon sequencing data with network analysis. Up to 100-fold increases in the abundance of several AbR genes, including genes conferring resistance to quinolones, trimethoprim, sulfonamides, tetracycline, vancomycin and carbapenems, occurred following storm-water and modelled wet-weather sewer overflow events. The abundance of AbR genes strongly and significantly correlated with several potentially pathogenic bacterial OTUs regularly associated with wastewater infrastructure, such as Arcobacter, Acinetobacter, Aeromonas and Cloacibacterium. These high-resolution observations provide clear links between storm-water discharge and sewer overflow events and the occurrence of AbR in the coastal microbial assemblages inhabiting urban beaches, highlighting a direct mechanism for potentially significant AbR exposure risks to humans.
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Affiliation(s)
- Richard L Carney
- Climate Change Cluster, University of Technology Sydney, Australia
| | - Maurizio Labbate
- School of Life Sciences, University of Technology Sydney, Australia
| | - Nachshon Siboni
- Climate Change Cluster, University of Technology Sydney, Australia
| | - Kaitlin A Tagg
- Westmead Institute for Medical Research, University of Sydney, NSW, Australia; IHRC, Inc., Atlanta, GA, USA
| | - Simon M Mitrovic
- School of Life Sciences, University of Technology Sydney, Australia
| | - Justin R Seymour
- Climate Change Cluster, University of Technology Sydney, Australia.
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Norris JM, Zhuo A, Govendir M, Rowbotham SJ, Labbate M, Degeling C, Gilbert GL, Dominey-Howes D, Ward MP. Correction: Factors influencing the behaviour and perceptions of Australian veterinarians towards antibiotic use and antimicrobial resistance. PLoS One 2019; 14:e0224844. [PMID: 31665189 PMCID: PMC6821104 DOI: 10.1371/journal.pone.0224844] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
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10
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Norris JM, Zhuo A, Govendir M, Rowbotham SJ, Labbate M, Degeling C, Gilbert GL, Dominey-Howes D, Ward MP. Factors influencing the behaviour and perceptions of Australian veterinarians towards antibiotic use and antimicrobial resistance. PLoS One 2019; 14:e0223534. [PMID: 31600264 PMCID: PMC6786536 DOI: 10.1371/journal.pone.0223534] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Accepted: 09/23/2019] [Indexed: 11/18/2022] Open
Abstract
Antimicrobial resistance (AMR) is a global crisis with impacts on the future health and welfare of humans and animals. Determining key factors that influence veterinarians' antimicrobial prescribing behaviours can bridge the gap between prescribing guidelines and clinical usage. Veterinarians practicing in Australia were surveyed on their frequency in prescribing different antibiotics; factors influencing their antibiotic prescribing behaviours; and their perceptions of current drivers of AMR. Antibiotics were prescribed in a third of consultations with key differences in the frequency of use of specific antibiotics by small companion animal (SCA), equine and livestock veterinarians, which broadly aligned with antibiotic registration restrictions in Australia. SCA veterinarians reported prescribing broad-spectrum antibiotics of higher importance to human health more frequently than livestock veterinarians. Factors that were reported as 'strong' or 'moderate' barriers to appropriate antibiotic prescribing were the 1) cost of culture and susceptibility testing and 2) lack of access to rapid and affordable diagnostic tests. Fear of losing clients, colleague pressure, and lack of their own understanding about antibiotics were considered to be 'no' or 'somewhat' of a barrier to appropriate prescribing by respondents. SCA veterinarians placed greater importance on the contribution of antibiotic use in livestock to AMR, than antibiotic use in companion animals. Despite reporting use of fewer, mostly narrow spectrum antibiotics of lower importance to human and animal health, livestock veterinarians were generally more aware of their potential contribution to AMR. This study provides insights into the similarities and differences in SCA, equine and livestock veterinarians practicing in Australia and informs sector-specific strategies to improve antimicrobial stewardship.
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Affiliation(s)
- Jacqueline M. Norris
- Sydney School of Veterinary Science, The University of Sydney, Sydney, New South Wales, Australia
- Westmead Institute for Medical Research, Sydney, New South Wales, Australia
- * E-mail:
| | - Annie Zhuo
- School of Geosciences, The University of Sydney, Sydney, New South Wales, Australia
| | - Merran Govendir
- Sydney School of Veterinary Science, The University of Sydney, Sydney, New South Wales, Australia
| | - Samantha J. Rowbotham
- Menzies Centre for Health Policy, Sydney School of Public Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Maurizio Labbate
- School of Life Sciences, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Chris Degeling
- Australian Centre for Health Engagement, Evidence & Values, School of Health and Society - Faculty of Social Sciences, University of Wollongong, Wollongong, New South Wales, Australia
- Wollongong Antimicrobial Resistance Research Alliance (WARRA), University of Wollongong, Wollongong, New South Wales, Australia
| | - Gwendolyn L. Gilbert
- Westmead Institute for Medical Research, Sydney, New South Wales, Australia
- Marie Bashir Institute for Infectious Diseases and Biosecurity, The University of Sydney, Sydney, New South Wales, Australia
| | - Dale Dominey-Howes
- Westmead Institute for Medical Research, Sydney, New South Wales, Australia
- School of Geosciences, The University of Sydney, Sydney, New South Wales, Australia
| | - Michael P. Ward
- Sydney School of Veterinary Science, The University of Sydney, Sydney, New South Wales, Australia
- Westmead Institute for Medical Research, Sydney, New South Wales, Australia
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Green TJ, Siboni N, King WL, Labbate M, Seymour JR, Raftos D. Simulated Marine Heat Wave Alters Abundance and Structure of Vibrio Populations Associated with the Pacific Oyster Resulting in a Mass Mortality Event. Microb Ecol 2019; 77:736-747. [PMID: 30097682 DOI: 10.1007/s00248-018-1242-9] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 08/03/2018] [Indexed: 06/08/2023]
Abstract
Marine heat waves are predicted to become more frequent and intense due to anthropogenically induced climate change, which will impact global production of seafood. Links between rising seawater temperature and disease have been documented for many aquaculture species, including the Pacific oyster Crassostrea gigas. The oyster harbours a diverse microbial community that may act as a source of opportunistic pathogens during temperature stress. We rapidly raised the seawater temperature from 20 °C to 25 °C resulting in an oyster mortality rate of 77.4%. Under the same temperature conditions and with the addition of antibiotics, the mortality rate was only 4.3%, strongly indicating a role for bacteria in temperature-induced mortality. 16S rRNA amplicon sequencing revealed a change in the oyster microbiome when the temperature was increased to 25 °C, with a notable increase in the proportion of Vibrio sequences. This pattern was confirmed by qPCR, which revealed heat stress increased the abundance of Vibrio harveyi and Vibrio fortis by 324-fold and 10-fold, respectively. Our findings indicate that heat stress-induced mortality of C. gigas coincides with an increase in the abundance of putative bacterial pathogens in the oyster microbiome and highlights the negative consequences of marine heat waves on food production from aquaculture.
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Affiliation(s)
- Timothy J Green
- Department of Biological Sciences, Macquarie University, Sydney, Australia.
- Centre for Shellfish Research, Vancouver Island University, Nanaimo, Canada.
| | - Nachshon Siboni
- Climate Change Cluster (C3) Ocean Microbes Group, University of Technology Sydney, Sydney, Australia
| | - William L King
- Climate Change Cluster (C3) Ocean Microbes Group, University of Technology Sydney, Sydney, Australia
- The School of Life Sciences, University of Technology Sydney, Sydney, Australia
| | - Maurizio Labbate
- The School of Life Sciences, University of Technology Sydney, Sydney, Australia
| | - Justin R Seymour
- Climate Change Cluster (C3) Ocean Microbes Group, University of Technology Sydney, Sydney, Australia
| | - David Raftos
- Department of Biological Sciences, Macquarie University, Sydney, Australia
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12
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King WL, Siboni N, Williams NLR, Kahlke T, Nguyen KV, Jenkins C, Dove M, O'Connor W, Seymour JR, Labbate M. Variability in the Composition of Pacific Oyster Microbiomes Across Oyster Families Exhibiting Different Levels of Susceptibility to OsHV-1 μvar Disease. Front Microbiol 2019; 10:473. [PMID: 30915058 PMCID: PMC6421512 DOI: 10.3389/fmicb.2019.00473] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 02/22/2019] [Indexed: 11/13/2022] Open
Abstract
Oyster diseases are a major impediment to the profitability and growth of the oyster aquaculture industry. In recent years, geographically widespread outbreaks of disease caused by ostreid herpesvirus-1 microvariant (OsHV-1 μvar) have led to mass mortalities among Crassostrea gigas, the Pacific Oyster. Attempts to minimize the impact of this disease have been largely focused on breeding programs, and although these have shown some success in producing oyster families with reduced mortality, the mechanism(s) behind this protection is poorly understood. One possible factor is modification of the C. gigas microbiome. To explore how breeding for resistance to OsHV-1 μvar affects the oyster microbiome, we used 16S rRNA amplicon sequencing to characterize the bacterial communities associated with 35 C. gigas families, incorporating oysters with different levels of susceptibility to OsHV-1 μvar disease. The microbiomes of disease-susceptible families were significantly different to the microbiomes of disease-resistant families. OTUs assigned to the Photobacterium, Vibrio, Aliivibrio, Streptococcus, and Roseovarius genera were associated with low disease resistance. In partial support of this finding, qPCR identified a statistically significant increase of Vibrio-specific 16S rRNA gene copies in the low disease resistance families, possibly indicative of a reduced host immune response to these pathogens. In addition to these results, examination of the core microbiome revealed that each family possessed a small core community, with OTUs assigned to the Winogradskyella genus and the Bradyrhizobiaceae family consistent members across most disease-resistant families. This study examines patterns in the microbiome of oyster families exhibiting differing levels of OsHV-1 μvar disease resistance and reveals some key bacterial taxa that may provide a protective or detrimental role in OsHV-1 μvar disease outbreaks.
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Affiliation(s)
- William L King
- The School of Life Sciences, University of Technology Sydney, Ultimo, NSW, Australia.,Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, Australia
| | - Nachshon Siboni
- Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, Australia
| | - Nathan L R Williams
- The School of Life Sciences, University of Technology Sydney, Ultimo, NSW, Australia
| | - Tim Kahlke
- Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, Australia
| | - Khue Viet Nguyen
- The School of Life Sciences, University of Technology Sydney, Ultimo, NSW, Australia.,Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, Australia
| | - Cheryl Jenkins
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW, Australia
| | - Michael Dove
- NSW Department of Primary Industries, Port Stephens Fisheries Institute, Port Stephens, NSW, Australia
| | - Wayne O'Connor
- NSW Department of Primary Industries, Port Stephens Fisheries Institute, Port Stephens, NSW, Australia
| | - Justin R Seymour
- Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, Australia
| | - Maurizio Labbate
- The School of Life Sciences, University of Technology Sydney, Ultimo, NSW, Australia
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13
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King WL, Jenkins C, Go J, Siboni N, Seymour JR, Labbate M. Characterisation of the Pacific Oyster Microbiome During a Summer Mortality Event. Microb Ecol 2019; 77:502-512. [PMID: 29987529 DOI: 10.1007/s00248-018-1226-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Accepted: 07/02/2018] [Indexed: 06/08/2023]
Abstract
The Pacific oyster, Crassostrea gigas, is a key commercial species that is cultivated globally. In recent years, disease outbreaks have heavily impacted C. gigas stocks worldwide, with many losses incurred during summer. A number of infectious agents have been associated with these summer mortality events, including viruses (particularly Ostreid herpesvirus 1, OsHV-1) and bacteria; however, cases where no known aetiological agent can be identified are common. In this study, we examined the microbiome of disease-affected and disease-unaffected C. gigas during a 2013-2014 summer mortality event in Port Stephens (Australia) where known oyster pathogens including OsHV-1 were not detected. The adductor muscle microbiomes of 70 C. gigas samples across 12 study sites in the Port Stephens estuary were characterised using 16S rRNA (V1-V3 region) amplicon sequencing, with the aim of comparing the influence of spatial location and disease state on the oyster microbiome. Spatial location was found to be a significant determinant of the disease-affected oyster microbiome. Furthermore, microbiome comparisons between disease states identified a significant increase in rare operational taxonomic units (OTUs) belonging to Vibrio harveyi and an unidentified member of the Vibrio genus in the disease-affected microbiome. This is indicative of a potential role of Vibrio species in oyster disease and supportive of previous culture-based examination of this mortality event.
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Affiliation(s)
- William L King
- The School of Life Sciences, University of Technology Sydney, PO Box 123, Broadway, Sydney, NSW, 2007, Australia
- Climate Change Cluster, University of Technology Sydney, Sydney, NSW, Australia
| | - Cheryl Jenkins
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW, Australia
| | - Jeffrey Go
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW, Australia
| | - Nachshon Siboni
- Climate Change Cluster, University of Technology Sydney, Sydney, NSW, Australia
| | - Justin R Seymour
- Climate Change Cluster, University of Technology Sydney, Sydney, NSW, Australia
| | - Maurizio Labbate
- The School of Life Sciences, University of Technology Sydney, PO Box 123, Broadway, Sydney, NSW, 2007, Australia.
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14
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King WL, Jenkins C, Seymour JR, Labbate M. Oyster disease in a changing environment: Decrypting the link between pathogen, microbiome and environment. Mar Environ Res 2019; 143:124-140. [PMID: 30482397 DOI: 10.1016/j.marenvres.2018.11.007] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 10/20/2018] [Accepted: 11/15/2018] [Indexed: 06/09/2023]
Abstract
Shifting environmental conditions are known to be important triggers of oyster diseases. The mechanism(s) behind these synergistic effects (interplay between host, environment and pathogen/s) are often not clear, although there is evidence that shifts in environmental conditions can affect oyster immunity, and pathogen growth and virulence. However, the impact of shifting environmental parameters on the oyster microbiome and how this affects oyster health and susceptibility to infectious pathogens remains understudied. In this review, we summarise the major diseases afflicting oysters with a focus on the role of environmental factors that can catalyse or amplify disease outbreaks. We also consider the potential role of the oyster microbiome in buffering or augmenting oyster disease outbreaks and suggest that a deeper understanding of the oyster microbiome, its links to the environment and its effect on oyster health and disease susceptibility, is required to develop new frameworks for the prevention and management of oyster diseases.
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Affiliation(s)
- William L King
- The School of Life Sciences, University of Technology Sydney, NSW, Australia; Climate Change Cluster, University of Technology Sydney, NSW, Australia
| | - Cheryl Jenkins
- Elizabeth Macarthur Institute, New South Wales Department of Primary Industries, Menangle, NSW, Australia
| | - Justin R Seymour
- Climate Change Cluster, University of Technology Sydney, NSW, Australia
| | - Maurizio Labbate
- The School of Life Sciences, University of Technology Sydney, NSW, Australia.
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15
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Mahbub KR, Bahar MM, Megharaj M, Labbate M. Are the existing guideline values adequate to protect soil health from inorganic mercury contamination? Environ Int 2018; 117:10-15. [PMID: 29704752 DOI: 10.1016/j.envint.2018.04.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 04/20/2018] [Accepted: 04/20/2018] [Indexed: 06/08/2023]
Abstract
Currently, data that guide safe concentration ranges for inorganic mercury in the soil are lacking and subsequently, threaten soil health. In the present study, a species sensitivity distribution (SSD) approach was applied to estimate critical mercury concentration that has little (HC5) or no effect (PNEC) on soil biota. Recently published terrestrial toxicity data were incorporated in the approach. Considering total mercury content in soils, the estimated HC5 was 0.6 mg/kg, and the PNEC was 0.12-0.6 mg/kg. Whereas, when only water-soluble mercury fractions were considered, these values were 0.04 mg/kg and 0.008-0.04 mg/kg, respectively.
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Affiliation(s)
| | - Md Mezbaul Bahar
- Global Center for Environmental Remediation, Research and Innovation Division, The University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Mallavarapu Megharaj
- Global Center for Environmental Remediation, Research and Innovation Division, The University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Maurizio Labbate
- School of Life Sciences, University of Technology Sydney, Ultimo, NSW 2007, Australia.
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16
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Zhuo A, Labbate M, Norris JM, Gilbert GL, Ward MP, Bajorek BV, Degeling C, Rowbotham SJ, Dawson A, Nguyen KA, Hill-Cawthorne GA, Sorrell TC, Govendir M, Kesson AM, Iredell JR, Dominey-Howes D. Opportunities and challenges to improving antibiotic prescribing practices through a One Health approach: results of a comparative survey of doctors, dentists and veterinarians in Australia. BMJ Open 2018; 8:e020439. [PMID: 29602857 PMCID: PMC5884343 DOI: 10.1136/bmjopen-2017-020439] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
OBJECTIVES To explore and compare the knowledge, attitudes and experiences of doctors, dentists and veterinarians (as prescribers) in relation to antibiotic use and antibiotic resistance (AbR), and to consider the implications of these for policy-making that support a One Health approach. DESIGN A cross-sectional survey conducted online. SETTING Doctors, dentists and veterinarians practising in primary, secondary or tertiary care in Australia. PARTICIPANTS 547 doctors, 380 dentists and 403 veterinarians completed the survey. MAIN OUTCOME MEASURES Prescribers' knowledge, attitudes and perceptions of AbR, the extent to which a range of factors are perceived as barriers to appropriate prescribing practices, and perceived helpfulness of potential strategies to improve antibiotic prescribing in practice. RESULTS There was substantial agreement across prescriber groups that action on AbR is required by multiple sectors and stakeholders. However, prescribers externalised responsibility to some extent by seeing the roles of others as more important than their own in relation to AbR. There were common and context-specific barriers to optimal prescribing across the prescriber groups. Prescriber groups generally perceived restrictive policies as unhelpful to supporting appropriate prescribing in their practice. CONCLUSIONS The results have implications for implementing a One Health approach that involves doctors, dentists and veterinarians as key players to tackling the crisis of AbR. The findings are that (1) prescribers understand and are likely receptive to a One Health policy approach to AbR, (2) policy development should be sensitive to barriers that are specific to individual prescriber groups and (3) the development and introduction of interventions that might be perceived as reducing prescriber autonomy will need to be carefully designed and implemented.
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Affiliation(s)
- Annie Zhuo
- School of Geosciences, The University of Sydney, Sydney, NSW, Australia
| | - Maurizio Labbate
- School of Life Sciences, University of Technology Sydney, Sydney, New South Wales, Australia
- The ithree Institute, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Jacqueline M Norris
- Sydney School of Veterinary Science, University of Sydney, Sydney, New South Wales, Australia
- Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney, Sydney, New South Wales, Australia
| | - Gwendolyn L Gilbert
- Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney, Sydney, New South Wales, Australia
| | - Michael P Ward
- Sydney School of Veterinary Science, University of Sydney, Sydney, New South Wales, Australia
- Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney, Sydney, New South Wales, Australia
| | - Beata V Bajorek
- Graduate School of Health, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Chris Degeling
- Faculty of Social Science, University of Wollongong, Wollongong, NSW, Australia
| | - Samantha J Rowbotham
- Menzies Centre for Health Policy, Sydney School of Public Health, University of Sydney, Sydney, New South Wales, Australia
- The Australian Prevention Partnership Centre, The Sax Institute, Sydney, New South Wales, Australia
| | - Angus Dawson
- Sydney Health Ethics, University of Sydney, Sydney, New South Wales, Australia
| | - Ky-Anh Nguyen
- Faculty of Dentistry, University of Sydney, Sydney, New South Wales, Australia
- Institute of Dental Research, Westmead Centre for Oral Health, Sydney, New South Wales, Australia
| | - Grant A Hill-Cawthorne
- Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney, Sydney, New South Wales, Australia
- Sydney School of Public Health, University of Sydney, Sydney, New South Wales, Australia
| | - Tania C Sorrell
- Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney, Sydney, New South Wales, Australia
- Westmead Institute for Medical Research, Sydney, New South Wales, Australia
| | - Merran Govendir
- Sydney School of Veterinary Science, University of Sydney, Sydney, New South Wales, Australia
| | - Alison M Kesson
- Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney, Sydney, New South Wales, Australia
- Discipline of Child and Adolescent Health, Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
- Infectious Disease and Microbiology, The Children’s Hospital at Westmead, Sydney, NSW, Australia
| | - Jonathan R Iredell
- Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney, Sydney, New South Wales, Australia
- Westmead Institute for Medical Research, Sydney, New South Wales, Australia
- Westmead Hospital, Sydney, New South Wales, Australia
| | - Dale Dominey-Howes
- School of Geosciences, The University of Sydney, Sydney, NSW, Australia
- Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney, Sydney, New South Wales, Australia
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17
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Sartelli M, Kluger Y, Ansaloni L, Carlet J, Brink A, Hardcastle TC, Khanna A, Chicom-Mefire A, Rodríguez-Baño J, Nathwani D, Mendelson M, Watkins RR, Pulcini C, Beović B, May AK, Itani KMF, Mazuski JE, Fry DE, Coccolini F, Raşa K, Montravers P, Eckmann C, Abbo LM, Abubakar S, Abu-Zidan FM, Adesunkanmi AK, Al-Hasan MN, Althani AA, Ticas JEA, Ansari S, Ansumana R, da Silva ARA, Augustin G, Bala M, Balogh ZJ, Baraket O, Bassett,i M, Bellanova G, Beltran MA, Ben-Ishay O, Biffl WL, Boermeester MA, Brecher SM, Bueno J, Cainzos MA, Cairns K, Camacho-Ortiz A, Ceresoli M, Chandy SJ, Cherry-Bukowiec JR, Cirocchi R, Colak E, Corcione A, Cornely OA, Cortese F, Cui Y, Curcio D, Damaskos D, Daş K, Delibegovic S, Demetrashvili Z, De Simone B, de Souza HP, De Waele J, Dhingra S, Diaz JJ, Di Carlo I, Di Marzo F, Di Saverio S, Dogjani A, Dorj G, Dortet L, Duane TM, Dupont H, Egiev VN, Eid HO, Elmangory M, Marei HES, Enani MA, Escandón-Vargas K, Faro Junior MP, Ferrada P, Foghetti D, Foianini E, Fraga GP, Frattima S, Gandhi C, Gattuso G, Giamarellou E, Ghnnam W, Gkiokas G, Girardis M, Goff DA, Gomes CA, Gomi H, Gronerth RIG, Guirao X, Guzman-Blanco M, Haque M, Hecker A, Hell M, Herzog T, Hicks L, Kafka-Ritsch R, Kao LS, Kanj SS, Kaplan LJ, Kapoor G, Karamarkovic A, Kashuk J, Kenig J, Khamis F, Khokha V, Kiguba R, Kirkpatrick AW, Kørner H, Koike K, Kok KYY, Kon K, Kong V, Inaba K, Ioannidis O, Isik A, Iskandar K, Labbate M, Labricciosa FM, Lagrou K, Lagunes L, Latifi R, Lasithiotakis K, Laxminarayan R, Lee JG, Leone M, Leppäniemi A, Li Y, Liang SY, Liau KH, Litvin A, Loho T, Lowman W, Machain GM, Maier RV, Manzano-Nunez R, Marinis A, Marmorale C, Martin-Loeches I, Marwah S, Maseda E, McFarlane M, de Melo RB, Melotti MR, Memish Z, Mertz D, Mesina C, Menichetti F, Mishra SK, Montori G, Moore EE, Moore FA, Naidoo N, Napolitano L, Negoi I, Nicolau DP, Nikolopoulos I, Nord CE, Ofori-Asenso R, Olaoye I, Omari AH, Ordoñez CA, Ouadii M, Ouedraogo AS, Pagani L, Paiva JA, Parreira JG, Pata F, Pereira J, Pereira NR, Petrosillo N, Picetti E, Pintar T, Ponce-de-Leon A, Popovski Z, Poulakou G, Preller J, Guerrero AP, Pupelis G, Quiodettis M, Rawson TM, Reichert M, Reinhart K, Rems M, Rello J, Rizoli S, Roberts J, Rubio-Perez I, Ruppé E, Sakakushev B, Sall I, Kafil HS, Sanders J, Sato N, Sawyer RG, Scalea T, Scibé R, Scudeller L, Lohse HS, Sganga G, Shafiq N, Shah JN, Spigaglia P, Suroowan S, Tsioutis C, Sifri CD, Siribumrungwong B, Sugrue M, Talving P, Tan BK, Tarasconi A, Tascini C, Tilsed J, Timsit JF, Tumbarello M, Trung NT, Ulrych J, Uranues S, Velmahos G, Vereczkei AG, Viale P, Estape JV, Viscoli C, Wagenlehner F, Wright BJ, Xiao Y, Yuan KC, Zachariah SK, Zahar JR, Mergulhão P, Catena F. A Global Declaration on Appropriate Use of Antimicrobial Agents across the Surgical Pathway. Surg Infect (Larchmt) 2017; 18:846-853. [PMID: 29173054 DOI: 10.1089/sur.2017.219] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
This declaration, signed by an interdisciplinary task force of 234 experts from 83 different countries with different backgrounds, highlights the threat posed by antimicrobial resistance and the need for appropriate use of antibiotic agents and antifungal agents in hospitals worldwide especially focusing on surgical infections. As such, it is our intent to raise awareness among healthcare workers and improve antimicrobial prescribing. To facilitate its dissemination, the declaration was translated in different languages.
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18
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Donnelly S, Huston WM, Johnson M, Tiberti N, Saunders B, O'Brien B, Burke C, Labbate M, Combes V. Targeting the master regulator mTOR: a new approach to prevent the neurological of consequences of parasitic infections? Parasit Vectors 2017; 10:581. [PMID: 29162126 PMCID: PMC5697405 DOI: 10.1186/s13071-017-2528-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 11/09/2017] [Indexed: 11/10/2022] Open
Abstract
A systematic analysis of 240 causes of death in 2013 revealed that parasitic diseases were responsible for more than one million deaths. The vast majority of these fatalities resulted from protozoan infections presenting with neurological sequelae. In the absence of a vaccine, development of effective therapies is essential to improving global public health. In 2015, an intriguing strategy to prevent cerebral malaria was proposed by Gordon et al. 2015 mBio, 6:e00625. Their study suggested that inhibition of the mammalian target of rapamycin prevented experimental cerebral malaria by blocking the damage to the blood brain barrier and stopping the accumulation of parasitized red blood cells and T cells in the brain. Here, we hypothesize that the same therapeutic strategy could be adopted for other protozoan infections with a brain tropism, to prevent cerebral parasitosis by limiting pathogen replication and preventing immune mediated destruction of brain tissue.
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Affiliation(s)
- Sheila Donnelly
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Wilhelmina M Huston
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Michael Johnson
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Natalia Tiberti
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Bernadette Saunders
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Bronwyn O'Brien
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Catherine Burke
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Maurizio Labbate
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Valery Combes
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, NSW, 2007, Australia.
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19
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Michael CA, Franks AE, Labbate M. The antimicrobial resistance crisis: management through gene monitoring. Open Biol 2017; 6:rsob.160236. [PMID: 27831476 PMCID: PMC5133444 DOI: 10.1098/rsob.160236] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 10/14/2016] [Indexed: 12/13/2022] Open
Abstract
Antimicrobial resistance (AMR) is an acknowledged crisis for humanity. Its genetic origins and dire potential outcomes are increasingly well understood. However, diagnostic techniques for monitoring the crisis are currently largely limited to enumerating the increasing incidence of resistant pathogens. Being the end-stage of the evolutionary process that produces antimicrobial resistant pathogens, these measurements, while diagnostic, are not prognostic, and so are not optimal in managing this crisis. A better test is required. Here, using insights from an understanding of evolutionary processes ruling the changing abundance of genes under selective pressure, we suggest a predictive framework for the AMR crisis. We then discuss the likely progression of resistance for both existing and prospective antimicrobial therapies. Finally, we suggest that by the environmental monitoring of resistance gene frequency, resistance may be detected and tracked presumptively, and how this tool may be used to guide decision-making in the local and global use of antimicrobials.
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Affiliation(s)
- Carolyn A Michael
- School of Life Sciences, University of Technology Sydney, Sydney 2007, Australia
| | - Ashley E Franks
- Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Melbourne, Victoria, Australia
| | - Maurizio Labbate
- School of Life Sciences, University of Technology Sydney, Sydney 2007, Australia.,ithree institute, University of Technology Sydney, Sydney 2007, Australia
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20
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Mahbub KR, Kader M, Krishnan K, Labbate M, Naidu R, Megharaj M. Toxicity of Inorganic Mercury to Native Australian Grass Grown in Three Different Soils. Bull Environ Contam Toxicol 2017; 98:850-855. [PMID: 28451726 DOI: 10.1007/s00128-017-2096-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 04/21/2017] [Indexed: 05/04/2023]
Abstract
In this study, three native Australian grasses namely Iseilema membranaceum (Barcoo), Dichanthium sericeum (Queensland Blue) and Sporobolus africanus (Tussock) were grown in three different soils spiked with different concentrations of inorganic mercury and the root elongation was monitored up to 28 days following the germination. Results showed that mercury at certain concentrations significantly inhibited the root growth of all three tested native grasses grown in three soils, however, the toxicity was less in the soil with high organic carbon content and acidic pH. The calculated EC50 values ranged from 10 to 224 mg/kg total Hg in soil. However, the EC10 values indicated that existing guideline values for mercury may be of protective to the native Australian vegetation. Considering their tolerance to soil mercury, these grass species have the potential for their use in rehabilitation of mercury contaminated sites.
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Affiliation(s)
- Khandaker Rayhan Mahbub
- Faculty of Science and Information Technology, Global Centre for Environmental Remediation, The University of Newcastle, Callaghan, NSW, 2308, Australia.
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC-CARE), University Drive, Callaghan, NSW, 2308, Australia.
- School of Life Sciences & the i3 Institute, University of Technology Sydney, Ultimo, NSW, 2007, Australia.
- Bangladesh Council of Scientific and Industrial Research, Dhanmondi, Dhaka, 1205, Bangladesh.
| | - Mohammed Kader
- Faculty of Science and Information Technology, Global Centre for Environmental Remediation, The University of Newcastle, Callaghan, NSW, 2308, Australia
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC-CARE), University Drive, Callaghan, NSW, 2308, Australia
| | - Kannan Krishnan
- Faculty of Science and Information Technology, Global Centre for Environmental Remediation, The University of Newcastle, Callaghan, NSW, 2308, Australia
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC-CARE), University Drive, Callaghan, NSW, 2308, Australia
| | - Maurizio Labbate
- School of Life Sciences & the i3 Institute, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Ravi Naidu
- Faculty of Science and Information Technology, Global Centre for Environmental Remediation, The University of Newcastle, Callaghan, NSW, 2308, Australia
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC-CARE), University Drive, Callaghan, NSW, 2308, Australia
| | - Mallavarapu Megharaj
- Faculty of Science and Information Technology, Global Centre for Environmental Remediation, The University of Newcastle, Callaghan, NSW, 2308, Australia
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC-CARE), University Drive, Callaghan, NSW, 2308, Australia
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Mahbub KR, Bahar MM, Labbate M, Krishnan K, Andrews S, Naidu R, Megharaj M. Bioremediation of mercury: not properly exploited in contaminated soils! Appl Microbiol Biotechnol 2017; 101:963-976. [DOI: 10.1007/s00253-016-8079-2] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 12/14/2016] [Indexed: 12/18/2022]
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22
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Sartelli M, Weber DG, Ruppé E, Bassetti M, Wright BJ, Ansaloni L, Catena F, Coccolini F, Abu-Zidan FM, Coimbra R, Moore EE, Moore FA, Maier RV, De Waele JJ, Kirkpatrick AW, Griffiths EA, Eckmann C, Brink AJ, Mazuski JE, May AK, Sawyer RG, Mertz D, Montravers P, Kumar A, Roberts JA, Vincent JL, Watkins RR, Lowman W, Spellberg B, Abbott IJ, Adesunkanmi AK, Al-Dahir S, Al-Hasan MN, Agresta F, Althani AA, Ansari S, Ansumana R, Augustin G, Bala M, Balogh ZJ, Baraket O, Bhangu A, Beltrán MA, Bernhard M, Biffl WL, Boermeester MA, Brecher SM, Cherry-Bukowiec JR, Buyne OR, Cainzos MA, Cairns KA, Camacho-Ortiz A, Chandy SJ, Che Jusoh A, Chichom-Mefire A, Colijn C, Corcione F, Cui Y, Curcio D, Delibegovic S, Demetrashvili Z, De Simone B, Dhingra S, Diaz JJ, Di Carlo I, Dillip A, Di Saverio S, Doyle MP, Dorj G, Dogjani A, Dupont H, Eachempati SR, Enani MA, Egiev VN, Elmangory MM, Ferrada P, Fitchett JR, Fraga GP, Guessennd N, Giamarellou H, Ghnnam W, Gkiokas G, Goldberg SR, Gomes CA, Gomi H, Guzmán-Blanco M, Haque M, Hansen S, Hecker A, Heizmann WR, Herzog T, Hodonou AM, Hong SK, Kafka-Ritsch R, Kaplan LJ, Kapoor G, Karamarkovic A, Kees MG, Kenig J, Kiguba R, Kim PK, Kluger Y, Khokha V, Koike K, Kok KY, Kong V, Knox MC, Inaba K, Isik A, Iskandar K, Ivatury RR, Labbate M, Labricciosa FM, Laterre PF, Latifi R, Lee JG, Lee YR, Leone M, Leppaniemi A, Li Y, Liang SY, Loho T, Maegele M, Malama S, Marei HE, Martin-Loeches I, Marwah S, Massele A, McFarlane M, Melo RB, Negoi I, Nicolau DP, Nord CE, Ofori-Asenso R, Omari AH, Ordonez CA, Ouadii M, Pereira Júnior GA, Piazza D, Pupelis G, Rawson TM, Rems M, Rizoli S, Rocha C, Sakakushev B, Sanchez-Garcia M, Sato N, Segovia Lohse HA, Sganga G, Siribumrungwong B, Shelat VG, Soreide K, Soto R, Talving P, Tilsed JV, Timsit JF, Trueba G, Trung NT, Ulrych J, van Goor H, Vereczkei A, Vohra RS, Wani I, Uhl W, Xiao Y, Yuan KC, Zachariah SK, Zahar JR, Zakrison TL, Corcione A, Melotti RM, Viscoli C, Viale P. Erratum to: Antimicrobials: a global alliance for optimizing their rational use in intra-abdominal infections (AGORA). World J Emerg Surg 2017; 12:35. [PMID: 28785301 PMCID: PMC5541698 DOI: 10.1186/s13017-017-0147-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 07/27/2017] [Indexed: 02/08/2023] Open
Abstract
[This corrects the article DOI: 10.1186/s13017-016-0089-y.].
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Affiliation(s)
- M. Sartelli
- Department of Surgery, Macerata Hospital, Via Santa Lucia 2, 62100 Macerata, Italy
| | - D. G. Weber
- 0000 0004 0453 3875grid.416195.eDepartment of Trauma Surgery, Royal Perth Hospital, Perth, Australia
| | - E. Ruppé
- 0000 0001 0721 9812grid.150338.cGenomic Research Laboratory, Geneva University Hospitals, Geneva, Switzerland
| | - M. Bassetti
- grid.411492.bInfectious Diseases Division, Santa Maria Misericordia University Hospital, Udine, Italy
| | - B. J. Wright
- 0000 0001 2216 9681grid.36425.36Department of Emergency Medicine and Surgery, Stony Brook University School of Medicine, Stony Brook, NY USA
| | - L. Ansaloni
- 0000 0004 1757 8431grid.460094.fGeneral Surgery Department, Papa Giovanni XXIII Hospital, Bergamo, Italy
| | - F. Catena
- Department of General, Maggiore Hospital, Parma, Italy
| | - F. Coccolini
- grid.414614.2Department of Surgery, “Infermi” Hospital, Rimini, Italy
| | - F. M. Abu-Zidan
- 0000 0001 2193 6666grid.43519.3aDepartment of Surgery, College of Medicine and Health Sciences, UAE University, Al-Ain, United Arab Emirates
| | - R. Coimbra
- 0000 0001 2107 4242grid.266100.3Department of Surgery, UC San Diego Medical Center, San Diego, USA
| | - E. E. Moore
- Department of Surgery, University of Colorado, Denver Health Medical Center, Denver, CO USA
| | - F. A. Moore
- 0000 0004 1936 8091grid.15276.37Department of Surgery, Division of Acute Care Surgery, and Center for Sepsis and Critical Illness Research, University of Florida College of Medicine, Gainesville, FL USA
| | - R. V. Maier
- 0000000122986657grid.34477.33Department of Surgery, University of Washington, Seattle, WA USA
| | - J. J. De Waele
- 0000 0004 0626 3303grid.410566.0Department of Critical Care Medicine, Ghent University Hospital, Ghent, Belgium
| | - A. W. Kirkpatrick
- 0000 0004 0469 2139grid.414959.4General, Acute Care, and Trauma Surgery, Foothills Medical Centre, Calgary, AB Canada
| | - E. A. Griffiths
- 0000 0001 2177 007Xgrid.415490.dGeneral and Upper GI Surgery, Queen Elizabeth Hospital, Birmingham, UK
| | - C. Eckmann
- Department of General, Visceral, and Thoracic Surgery, Klinikum Peine, Academic Hospital of Medical University Hannover, Peine, Germany
| | - A. J. Brink
- 0000 0004 0634 9246grid.415666.6Department of Clinical microbiology, Ampath National Laboratory Services, Milpark Hospital, Johannesburg, South Africa
| | - J. E. Mazuski
- 0000 0001 2355 7002grid.4367.6Department of Surgery, School of Medicine, Washington University in Saint Louis, Saint Louis, MO USA
| | - A. K. May
- 0000 0004 1936 9916grid.412807.8Departments of Surgery and Anesthesiology, Division of Trauma and Surgical Critical Care, Vanderbilt University Medical Center, Nashville, TN USA
| | - R. G. Sawyer
- 0000 0004 1936 9932grid.412587.dDepartment of Surgery, University of Virginia Health System, Charlottesville, VA USA
| | - D. Mertz
- 0000 0004 1936 8227grid.25073.33Departments of Medicine, Clinical Epidemiology and Biostatistics, and Pathology and Molecular Medicine, McMaster University, Hamilton, ON Canada
| | - P. Montravers
- 0000 0001 2217 0017grid.7452.4Département d’Anesthésie-Réanimation, CHU Bichat Claude-Bernard-HUPNVS, Assistance Publique-Hôpitaux de Paris, University Denis Diderot, Paris, France
| | - A. Kumar
- 0000 0004 1936 9609grid.21613.37Section of Critical Care Medicine and Section of Infectious Diseases, Department of Medicine, Medical Microbiology and Pharmacology/Therapeutics, University of Manitoba, Winnipeg, MB Canada
| | - J. A. Roberts
- 0000 0000 9320 7537grid.1003.2Australia Pharmacy Department, Royal Brisbane and Womens’ Hospital, Burns, Trauma, and Critical Care Research Centre, Australia School of Pharmacy, The University of Queensland, QLD, Brisbane, Australia
| | - J. L. Vincent
- 0000 0001 2348 0746grid.4989.cDepartment of Intensive Care, Erasme Hospital, Université libre de Bruxelles, Brussels, Belgium
| | - R. R. Watkins
- 0000 0004 0459 7529grid.261103.7Department of Internal Medicine, Division of Infectious Diseases, Akron General Medical Center, Northeast Ohio Medical University, Akron, OH USA
| | - W. Lowman
- 0000 0004 1937 1135grid.11951.3dClinical Microbiology and Infectious Diseases, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - B. Spellberg
- 0000 0001 2156 6853grid.42505.36Division of Infectious Diseases, Los Angeles County-University of Southern California (USC) Medical Center, Keck School of Medicine at USC, Los Angeles, CA USA
| | - I. J. Abbott
- 0000 0004 0432 511Xgrid.1623.6Department of Infectious Diseases, Alfred Hospital, Melbourne, VIC Australia
| | - A. K. Adesunkanmi
- 0000 0001 2183 9444grid.10824.3fDepartment of Surgery, College of Health Sciences, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - S. Al-Dahir
- 0000 0000 9679 3586grid.268355.fDivision of Clinical and Administrative Sciences, College of Pharmacy, Xavier University of Louisiana, New Orleans, LA USA
| | - M. N. Al-Hasan
- 0000 0000 9075 106Xgrid.254567.7Department of Medicine, Division of Infectious Diseases, University of South Carolina School of Medicine, Columbia, SC USA
| | - F. Agresta
- General Surgery, ULSS19 del Veneto, Adria Hospital, Adria, RO Italy
| | - A. A. Althani
- 0000 0004 0634 1084grid.412603.2Biomedical Research Center, Qatar University, Doha, Qatar
| | - S. Ansari
- 0000 0001 0665 3553grid.412334.3Department of Microbiology, Chitwan Medical College, and Department of Environmental and Preventive Medicine, Oita University, Oita, Japan
| | - R. Ansumana
- 0000 0001 0721 6195grid.469452.8Centre for Neglected Tropical Diseases, Liverpool School of Tropical Medicine, University of Liverpool, and Mercy Hospital Research Laboratory, Njala University, Bo, Sierra Leone
| | - G. Augustin
- 0000 0004 0397 9648grid.412688.1Department of Surgery, University Hospital Center, Zagreb, Croatia
| | - M. Bala
- 0000 0001 2221 2926grid.17788.31Trauma and Acute Care Surgery Unit, Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | - Z. J. Balogh
- 0000 0004 0577 6676grid.414724.0Department of Traumatology, John Hunter Hospital and University of Newcastle, Newcastle, NSW Australia
| | - O. Baraket
- Department of Surgery, Bizerte Hospital, Bizerte, Tunisia
| | - A. Bhangu
- 0000 0001 2177 007Xgrid.415490.dAcademic Department of Surgery, Queen Elizabeth Hospital, Birmingham, UK
| | - M. A. Beltrán
- Department of General Surgery, Hospital San Juan de Dios de La Serena, La Serena, Chile
| | - M. Bernhard
- 0000 0001 2230 9752grid.9647.cEmergency Department, University of Leipzig, Leipzig, Germany
| | - W. L. Biffl
- 0000000107903411grid.241116.1Department of Surgery, University of Colorado, Denver, CO USA
| | - M. A. Boermeester
- 0000000404654431grid.5650.6Department of Surgery, Academic Medical Centre, Amsterdam, The Netherlands
| | - S. M. Brecher
- 0000 0004 0367 5222grid.475010.7Department of Pathology and Laboratory Medicine, VA Boston HealthCare System, and Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Boston, MA USA
| | - J. R. Cherry-Bukowiec
- 0000000086837370grid.214458.eDivision of Acute Care Surgery, Department of Surgery, University of Michigan, Ann Arbor, MI USA
| | - O. R. Buyne
- 0000 0004 0444 9382grid.10417.33Department of Surgery, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - M. A. Cainzos
- 0000 0000 8816 6945grid.411048.8Department of Surgery, Hospital Clínico Universitario, Santiago de Compostela, Spain
| | - K. A Cairns
- 0000 0004 0432 5259grid.267362.4Pharmacy Department, Alfred Health, Melbourne, VIC Australia
| | - A. Camacho-Ortiz
- 0000 0004 1760 058Xgrid.464574.0Hospital Epidemiology and Infectious Diseases, Hospital Universitario Dr Jose Eleuterio Gonzalez, Monterrey, Mexico
| | - S. J. Chandy
- 0000 0004 1781 1790grid.448741.aDepartment of Pharmacology, Pushpagiri Institute of Medical Sciences and Research Centre, Thiruvalla, Kerala India
| | - A. Che Jusoh
- Department of General Surgery, Kuala Krai Hospital, Kuala Krai, Kelantan Malaysia
| | - A. Chichom-Mefire
- Department of Surgery and Obstetrics/Gynaecology, Regional Hospital, Limbe, Cameroon
| | - C. Colijn
- 0000 0001 2113 8111grid.7445.2Department of Mathematics, Imperial College London, London, UK
| | - F. Corcione
- 0000 0004 1755 4122grid.416052.4Department of Laparoscopic and Robotic Surgery, Colli-Monaldi Hospital, Naples, Italy
| | - Y. Cui
- 0000 0000 9792 1228grid.265021.2Department of Surgery, Tianjin Nankai Hospital, Nankai Clinical School of Medicine, Tianjin Medical University, Tianjin, China
| | - D. Curcio
- Infectología Institucional SRL, Hospital Municipal Chivilcoy, Buenos Aires, Argentina
| | - S. Delibegovic
- 0000 0001 0682 9061grid.412410.2Department of Surgery, University Clinical Center of Tuzla, Tuzla, Bosnia and Herzegovina
| | - Z. Demetrashvili
- Department General Surgery, Kipshidze Central University Hospital, Tbilisi, Georgia
| | - B. De Simone
- Department of Surgery, Quatre Villes Hospital, St Cloud, France
| | - S. Dhingra
- grid.430529.9School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Eric Williams Medical Sciences Complex, Uriah Butler Highway, Champ Fleurs, Trinidad and Tobago
| | - J. J. Diaz
- Division of Acute Care Surgery, Program in Trauma, R Adams Cowley Shock Trauma Center, University of Maryland, Baltimore, MD USA
| | - I. Di Carlo
- 0000 0004 1757 1969grid.8158.4Department of Surgical Sciences, Cannizzaro Hospital, University of Catania, Catania, Italy
| | - A. Dillip
- 0000 0000 9144 642Xgrid.414543.3Ifakara Health Institute, Dar es Salaam, Tanzania
| | - S. Di Saverio
- 0000 0004 1759 7093grid.416290.8Department of Surgery, Maggiore Hospital, Bologna, Italy
| | - M. P. Doyle
- 0000 0004 1936 738Xgrid.213876.9Center for Food Safety, Department of Food Science and Technology, University of Georgia, Griffin, GA USA
| | - G. Dorj
- grid.444534.6School of Pharmacy and Biomedicine, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - A. Dogjani
- Department of Surgery, University Hospital of Trauma, Tirana, Albania
| | - H. Dupont
- 0000 0001 0789 1385grid.11162.35Département d’Anesthésie-Réanimation, CHU Amiens-Picardie, and INSERM U1088, Université de Picardie Jules Verne, Amiens, France
| | - S. R. Eachempati
- Department of Surgery, Division of Burn, Critical Care, and Trauma Surgery (K.P.S., S.R.E.), Weill Cornell Medical College/New York-Presbyterian Hospital, New York, USA
| | - M. A. Enani
- 0000 0004 0593 1832grid.415277.2Department of Medicine, Infectious Disease Division, King Fahad Medical City, Riyadh, Saudi Arabia
| | - V. N. Egiev
- 0000 0000 9559 0613grid.78028.35Department of Surgery, Pirogov Russian National Research Medical University, Moscow, Russian Federation
| | - M. M. Elmangory
- grid.414827.cSudan National Public Health Laboratory, Federal Ministry of Health, Khartoum, Sudan
| | - P. Ferrada
- 0000 0004 0458 8737grid.224260.0Department of Surgery, Virginia Commonwealth University, Richmond, VA USA
| | - J. R. Fitchett
- 000000041936754Xgrid.38142.3cDepartment of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, MA USA
| | - G. P. Fraga
- 0000 0001 0723 2494grid.411087.bDivision of Trauma Surgery, Department of Surgery, School of Medical Sciences, University of Campinas (Unicamp), Campinas, SP Brazil
| | | | - H. Giamarellou
- grid.414012.26th Department of Internal Medicine, Hygeia General Hospital, Athens, Greece
| | - W. Ghnnam
- 0000000103426662grid.10251.37Department of General Surgery, Mansoura Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - G. Gkiokas
- 0000 0001 2155 0800grid.5216.02nd Department of Surgery, Aretaieion University Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - S. R. Goldberg
- 0000 0004 0458 8737grid.224260.0Department of Surgery, Virginia Commonwealth University, Richmond, VA USA
| | - C. A. Gomes
- Department of Surgery, Hospital Universitário Terezinha de Jesus, Faculdade de Ciências Médicas e da Saúde de Juiz de Fora, Juiz de Fora, Brazil
| | - H. Gomi
- 0000 0001 2369 4728grid.20515.33Center for Global Health, Mito Kyodo General Hospital, University of Tsukuba, Mito, Ibaraki Japan
| | - M. Guzmán-Blanco
- Hospital Privado Centro Médico de Caracas and Hospital Vargas de Caracas, Caracas, Venezuela
| | - M. Haque
- grid.449287.4Unit of Pharmacology, Faculty of Medicine and Defense Health, National Defence University of Malaysia, Kuala Lumpur, Malaysia
| | - S. Hansen
- 0000 0001 2218 4662grid.6363.0Institute of Hygiene, Charité-Universitätsmedizin Berlin, Hindenburgdamm 27, 12203 Berlin, Germany
| | - A. Hecker
- 0000 0000 8584 9230grid.411067.5Department of General and Thoracic Surgery, University Hospital Giessen, Giessen, Germany
| | | | - T. Herzog
- 0000 0004 0490 981Xgrid.5570.7Department of Surgery, St. Josef Hospital, Ruhr University Bochum, Bochum, Germany
| | - A. M. Hodonou
- grid.440525.2Department of Surgery, Faculté de médecine, Université de Parakou, BP 123, Parakou, Bénin
| | - S. K. Hong
- 0000 0004 0533 4667grid.267370.7Division of Trauma and Surgical Critical Care, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - R. Kafka-Ritsch
- 0000 0000 8853 2677grid.5361.1Department of Visceral, Transplant and Thoracic Surgery, Innsbruck Medical University, Innsbruck, Austria
| | - L. J. Kaplan
- 0000 0004 1936 8972grid.25879.31Department of Surgery Philadelphia VA Medical Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA USA
| | - G. Kapoor
- grid.415285.fDepartment of Microbiology, Gandhi Medical College, Bhopal, India
| | - A. Karamarkovic
- 0000 0001 2166 9385grid.7149.bClinic for Emergency Surgery, Medical Faculty University of Belgrade, Belgrade, Serbia
| | - M. G. Kees
- 0000 0001 2218 4662grid.6363.0Department of Anesthesiology and Intensive Care, Charité Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany
| | - J. Kenig
- 0000 0001 2162 9631grid.5522.03rd Department of General Surgery, Jagiellonian University Medical College, Krakow, Poland
| | - R. Kiguba
- 0000 0004 0620 0548grid.11194.3cDepartment of Pharmacology and Therapeutics, College of Health Sciences, Makerere University, Kampala, Uganda
| | - P. K. Kim
- 0000 0001 2152 0791grid.240283.fDepartment of Surgery, Albert Einstein College of Medicine and Jacobi Medical Center, Bronx, NY USA
| | - Y. Kluger
- 0000 0000 9950 8111grid.413731.3Department of General Surgery, Division of Surgery, Rambam Health Care Campus, Haifa, Israel
| | - V. Khokha
- Department of Emergency Surgery, City Hospital, Mozyr, Belarus
| | - K. Koike
- 0000 0004 0372 2033grid.258799.8Department of Primary Care and Emergency Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - K. Y. Kok
- Department of Surgery, The Brunei Cancer Centre, Jerudong Park, Brunei
| | - V. Kong
- 0000 0004 0576 7753grid.414386.cDepartment of Surgery, Edendale Hospital, Pietermaritzburg, South Africa
| | - M. C. Knox
- 0000 0004 1936 834Xgrid.1013.3School of Medicine, Western Sydney University, Campbelltown, NSW Australia
| | - K. Inaba
- 0000 0001 2156 6853grid.42505.36Division of Acute Care Surgery and Surgical Critical Care, Department of Surgery, Los Angeles County and University of Southern California Medical Center, University of Southern California, Los Angeles, CA USA
| | - A. Isik
- 0000 0001 1498 7262grid.412176.7Department of General Surgery, Erzincan University, Faculty of Medicine, Erzincan, Turkey
| | - K. Iskandar
- 0000 0004 0417 6142grid.444421.3Department of Pharmacy, Lebanese International University, Beirut, Lebanon
| | - R. R. Ivatury
- 0000 0004 0458 8737grid.224260.0Department of Surgery, Virginia Commonwealth University, Richmond, VA USA
| | - M. Labbate
- 0000 0004 1936 7611grid.117476.2School of Life Science and The ithree Institute, University of Technology, Sydney, NSW Australia
| | - F. M. Labricciosa
- Department of Biomedical Sciences and Public Health, Unit of Hygiene, Preventive Medicine and Public Health, UNIVMP, Ancona, Italy
| | - P. F. Laterre
- 0000 0001 2294 713Xgrid.7942.8Department of Critical Care Medicine, Cliniques Universitaires Saint Luc, Université Catholique de Louvain (UCL), Brussels, Belgium
| | - R. Latifi
- 0000 0001 2168 186Xgrid.134563.6Department of Surgery, Division of Trauma, University of Arizona, Tucson, AZ USA
| | - J. G. Lee
- 0000 0004 0470 5454grid.15444.30Department of Surgery, Yonsei University College of Medicine, Seoul, South Korea
| | - Y. R. Lee
- grid.449762.aTexas Tech University Health Sciences Center School of Pharmacy, Abilene, TX USA
| | - M. Leone
- 0000 0001 2176 4817grid.5399.6Department of Anaesthesiology and Critical Care, Hôpital Nord, Assistance Publique-Hôpitaux de Marseille, Aix Marseille Université, Marseille, France
| | - A. Leppaniemi
- Abdominal Center, University Hospital Meilahti, Helsinki, Finland
| | - Y. Li
- 0000 0001 2314 964Xgrid.41156.37Department of Surgery, Inling Hospital, Nanjing University School of Medicine, Nanjing, China
| | - S. Y. Liang
- 0000 0001 2355 7002grid.4367.6Division of Infectious Diseases, Division of Emergency Medicine, Washington University School of Medicine, St. Louis, MO USA
| | - T. Loho
- 0000000120191471grid.9581.5Division of Infectious Diseases, Department of Clinical Pathology, Faculty of Medicine, University of Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
| | - M. Maegele
- 0000 0000 9024 6397grid.412581.bDepartment for Traumatology and Orthopedic Surgery, Cologne Merheim Medical Center (CMMC), University of Witten/Herdecke (UW/H), Cologne, Germany
| | - S. Malama
- 0000 0000 8914 5257grid.12984.36Health Research Program, Institute of Economic and Social Research, University of Zambia, Lusaka, Zambia
| | - H. E. Marei
- 0000 0004 0634 1084grid.412603.2Biomedical Research Center, Qatar University, Doha, Qatar
| | - I. Martin-Loeches
- Multidisciplinary Intensive Care Research Organization (MICRO), Wellcome Trust-HRB Clinical Research, Department of Clinical Medicine, Trinity Centre for Health Sciences, St James’ University Hospital, Dublin, Ireland
| | - S. Marwah
- 0000 0004 1771 1642grid.412572.7Department of Surgery, Post-Graduate Institute of Medical Sciences, Rohtak, India
| | - A. Massele
- 0000 0004 0635 5486grid.7621.2Department of Clinical Pharmacology, School of Medicine, University of Botswana, Gaborone, Botswana
| | - M. McFarlane
- 0000 0004 0500 5353grid.412963.bDepartment of Surgery, Radiology, University Hospital of the West Indies, Kingston, Jamaica
| | - R. B. Melo
- 0000 0000 9375 4688grid.414556.7General Surgery Department, Centro Hospitalar de São João, Porto, Portugal
| | - I. Negoi
- Department of Surgery, Emergency Hospital of Bucharest, Bucharest, Romania
| | - D. P. Nicolau
- Center of Anti-Infective Research and Development, Hartford, CT USA
| | - C. E. Nord
- 0000 0000 9241 5705grid.24381.3cDepartment of Laboratory Medicine, Division of Clinical Microbiology, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | | | - A. H. Omari
- 0000 0004 0411 3985grid.460946.9Department of Surgery, King Abdullah University Hospital, Irbid, Jordan
| | - C. A. Ordonez
- 0000 0001 2295 7397grid.8271.cDepartment of Surgery and Critical Care, Universidad del Valle, Fundación Valle del Lili, Cali, Colombia
| | - M. Ouadii
- Department of Surgery, Hassan II University Hospital, Medical School of Fez, Sidi Mohamed Benabdellah University, Fez, Morocco
| | - G. A. Pereira Júnior
- Division of Emergency and Trauma Surgery, Ribeirão Preto Medical School, Ribeirão Preto, Brazil
| | - D. Piazza
- Division of Surgery, Vittorio Emanuele Hospital, Catania, Italy
| | - G. Pupelis
- Department of General and Emergency Surgery, Riga East University Hospital ‘Gailezers’, Riga, Latvia
| | - T. M. Rawson
- 0000 0001 2113 8111grid.7445.2National Institute for Health Research, Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance, Imperial College London, Hammersmith Campus, London, UK
| | - M. Rems
- Department of General Surgery, Jesenice General Hospital, Jesenice, Slovenia
| | - S. Rizoli
- 0000 0001 2157 2938grid.17063.33Trauma and Acute Care Service, St Michael’s Hospital, University of Toronto, Toronto, Canada
| | - C. Rocha
- U.S. Naval Medical Research Unit N° 6, Callao, Peru
| | - B. Sakakushev
- General Surgery Department, Medical University, University Hospital St George, Plovdiv, Bulgaria
| | - M. Sanchez-Garcia
- 0000 0001 0671 5785grid.411068.aIntensive Care Department, Hospital Clínico San Carlos, Madrid, Spain
| | - N. Sato
- 0000 0004 0372 2033grid.258799.8Department of Primary Care and Emergency Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - H. A. Segovia Lohse
- 0000 0001 2289 5077grid.412213.7II Cátedra de Clínica Quirúrgica, Hospital de Clínicas, Universidad Nacional de Asunción, San Lorenzo, Paraguay
| | - G. Sganga
- 0000 0004 1760 4193grid.411075.6Department of Surgery, Catholic University of Sacred Heart, Policlinico A Gemelli, Rome, Italy
| | - B. Siribumrungwong
- 0000 0004 1937 1127grid.412434.4Department of Surgery, Faculty of Medicine, Thammasat University Hospital, Thammasat University, Pathum Thani, Thailand
| | - V. G. Shelat
- grid.240988.fDepartment of General Surgery, Tan Tock Seng Hospital, Tan Tock Seng, Singapore, Singapore
| | - K. Soreide
- 0000 0004 1936 7443grid.7914.bDepartment of Gastrointestinal Surgery, Stavanger University Hospital, Stavanger, Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - R. Soto
- Department of Emergency Surgery and Critical Care, Centro Medico Imbanaco, Cali, Colombia
| | - P. Talving
- Department of Surgery, North Estonia Medical Center, Tallinn, Estonia
| | - J. V. Tilsed
- grid.417700.5Surgery Health Care Group, Hull and East Yorkshire Hospitals NHS Trust, Hull, UK
| | - J. F. Timsit
- 0000 0000 8588 831Xgrid.411119.dAPHP medical and infectious diseases ICU, Bichat Hospital, Paris, France
| | - G. Trueba
- 0000 0000 9008 4711grid.412251.1Institute of Microbiology, Biological and Environmental Sciences College, University San Francisco de Quito, Quito, Ecuador
| | - N. T. Trung
- Department of Molecular Biology, Tran Hung Dao Hospital, No 1, Tran Hung Dao Street, Hai Ba Trung Dist, Hanoi, Vietnam
| | - J. Ulrych
- 0000 0000 9100 9940grid.411798.21st Department of Surgery - Department of Abdominal, Thoracic Surgery and Traumatology, General University Hospital, Prague, Czech Republic
| | - H. van Goor
- 0000 0004 0444 9382grid.10417.33Department of Surgery, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - A. Vereczkei
- 0000 0001 0663 9479grid.9679.1Department of Surgery, Medical School University of Pécs, Pécs, Hungary
| | - R. S. Vohra
- 0000 0001 0440 1889grid.240404.6Nottingham Oesophago-Gastric Unit, Nottingham University Hospitals, Nottingham, UK
| | - I. Wani
- 0000 0001 0174 2901grid.414739.cDepartment of Surgery, Sheri-Kashmir Institute of Medical Sciences, Srinagar, India
| | - W. Uhl
- 0000 0004 0490 981Xgrid.5570.7Department of Surgery, St. Josef Hospital, Ruhr University Bochum, Bochum, Germany
| | - Y. Xiao
- 0000 0004 1759 700Xgrid.13402.34State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affilliated Hospital, Zhejiang University, Zhejiang, China
| | - K. C. Yuan
- 0000 0004 1756 1461grid.454210.6Trauma and Emergency Surgery Department, Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | - S. K. Zachariah
- Department of Surgery, MOSC Medical College Kolenchery, Cochin, India
| | - J. R. Zahar
- Infection Control Unit, Angers University, CHU d’Angers, Angers, France
| | - T. L. Zakrison
- 0000 0004 1936 8606grid.26790.3aDivision of Trauma and Surgical Critical Care, DeWitt Daughtry Family Department of Surgry, University of Miami, Miami, FL USA
| | - A. Corcione
- 0000 0004 1755 4122grid.416052.4Anesthesia and Intensive Care Unit, AORN dei Colli Vincenzo Monaldi Hospital, Naples, Italy
| | - R. M. Melotti
- grid.412311.4Anesthesiology and Intensive Care Unit, Sant’Orsola University Hospital, Bologna, Italy
| | - C. Viscoli
- 0000 0001 2151 3065grid.5606.5Infectious Diseases Unit, University of Genoa (DISSAL) and IRCCS San Martino-IST, Genoa, Italy
| | - P. Viale
- 0000 0004 1757 1758grid.6292.fInfectious Diseases Unit, Department of Medical and Surgical Sciences, Sant’ Orsola Hospital, University of Bologna, Bologna, Italy
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Labbate M, Seymour JR, Lauro F, Brown MV. Editorial: Anthropogenic Impacts on the Microbial Ecology and Function of Aquatic Environments. Front Microbiol 2016; 7:1044. [PMID: 27458441 PMCID: PMC4934117 DOI: 10.3389/fmicb.2016.01044] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 06/22/2016] [Indexed: 11/13/2022] Open
Affiliation(s)
- Maurizio Labbate
- School of Life Sciences and the ithree Institute, University of Technology Sydney Sydney, NSW, Australia
| | - Justin R Seymour
- Climate Change Cluster, University of Technology Sydney Sydney, NSW, Australia
| | - Federico Lauro
- Singapore Centre on Environmental Life Sciences Engineering, Nanyang Technological UniversitySingapore, Singapore; Asian School of the Environment, Nanyang Technological UniversitySingapore, Singapore
| | - Mark V Brown
- School of Biotechnology and Biomolecular Sciences, University of New South Wales Sydney, NSW, Australia
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24
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Siboni N, Balaraju V, Carney R, Labbate M, Seymour JR. Spatiotemporal Dynamics of Vibrio spp. within the Sydney Harbour Estuary. Front Microbiol 2016; 7:460. [PMID: 27148171 PMCID: PMC4829023 DOI: 10.3389/fmicb.2016.00460] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Accepted: 03/21/2016] [Indexed: 01/22/2023] Open
Abstract
Vibrio are a genus of marine bacteria that have substantial environmental and human health importance, and there is evidence that their impact may be increasing as a consequence of changing environmental conditions. We investigated the abundance and composition of the Vibrio community within the Sydney Harbour estuary, one of the most densely populated coastal areas in Australia, and a region currently experiencing rapidly changing environmental conditions. Using quantitative PCR (qPCR) and Vibrio-specific 16S rRNA amplicon sequencing approaches we observed significant spatial and seasonal variation in the abundance and composition of the Vibrio community. Total Vibrio spp. abundance, derived from qPCR analysis, was higher during the late summer than winter and within locations with mid-range salinity (5-26 ppt). In addition we targeted three clinically important pathogens: Vibrio cholerae, V. Vulnificus, and V. parahaemolyticus. While toxigenic strains of V. cholerae were not detected in any samples, non-toxigenic strains were detected in 71% of samples, spanning a salinity range of 0-37 ppt and were observed during both late summer and winter. In contrast, pathogenic V. vulnificus was only detected in 14% of samples, with its occurrence restricted to the late summer and a salinity range of 5-26 ppt. V. parahaemolyticus was not observed at any site or time point. A Vibrio-specific 16S rRNA amplicon sequencing approach revealed clear shifts in Vibrio community composition across sites and between seasons, with several Vibrio operational taxonomic units (OTUs) displaying marked spatial patterns and seasonal trends. Shifts in the composition of the Vibrio community between seasons were primarily driven by changes in temperature, salinity and NO2, while a range of factors including pH, salinity, dissolved oxygen (DO) and NOx (Nitrogen Oxides) explained the observed spatial variation. Our evidence for the presence of a spatiotemporally dynamic Vibrio community within Sydney Harbour is notable given the high levels of human use of this waterway, and the significant increases in seawater temperature predicted for this region.
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Affiliation(s)
- Nachshon Siboni
- Plant Functional Biology and Climate Change Cluster, University of Technology Sydney, UltimoNSW, Australia
| | - Varunan Balaraju
- Plant Functional Biology and Climate Change Cluster, University of Technology Sydney, UltimoNSW, Australia
- School of Life Sciences, The ithree institute, University of Technology Sydney, UltimoNSW, Australia
| | - Richard Carney
- Plant Functional Biology and Climate Change Cluster, University of Technology Sydney, UltimoNSW, Australia
| | - Maurizio Labbate
- School of Life Sciences, The ithree institute, University of Technology Sydney, UltimoNSW, Australia
| | - Justin R. Seymour
- Plant Functional Biology and Climate Change Cluster, University of Technology Sydney, UltimoNSW, Australia
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25
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Sartelli M, Weber DG, Ruppé E, Bassetti M, Wright BJ, Ansaloni L, Catena F, Coccolini F, Abu-Zidan FM, Coimbra R, Moore EE, Moore FA, Maier RV, De Waele JJ, Kirkpatrick AW, Griffiths EA, Eckmann C, Brink AJ, Mazuski JE, May AK, Sawyer RG, Mertz D, Montravers P, Kumar A, Roberts JA, Vincent JL, Watkins RR, Lowman W, Spellberg B, Abbott IJ, Adesunkanmi AK, Al-Dahir S, Al-Hasan MN, Agresta F, Althani AA, Ansari S, Ansumana R, Augustin G, Bala M, Balogh ZJ, Baraket O, Bhangu A, Beltrán MA, Bernhard M, Biffl WL, Boermeester MA, Brecher SM, Cherry-Bukowiec JR, Buyne OR, Cainzos MA, Cairns KA, Camacho-Ortiz A, Chandy SJ, Che Jusoh A, Chichom-Mefire A, Colijn C, Corcione F, Cui Y, Curcio D, Delibegovic S, Demetrashvili Z, De Simone B, Dhingra S, Diaz JJ, Di Carlo I, Dillip A, Di Saverio S, Doyle MP, Dorj G, Dogjani A, Dupont H, Eachempati SR, Enani MA, Egiev VN, Elmangory MM, Ferrada P, Fitchett JR, Fraga GP, Guessennd N, Giamarellou H, Ghnnam W, Gkiokas G, Goldberg SR, Gomes CA, Gomi H, Guzmán-Blanco M, Haque M, Hansen S, Hecker A, Heizmann WR, Herzog T, Hodonou AM, Hong SK, Kafka-Ritsch R, Kaplan LJ, Kapoor G, Karamarkovic A, Kees MG, Kenig J, Kiguba R, Kim PK, Kluger Y, Khokha V, Koike K, Kok KYY, Kong V, Knox MC, Inaba K, Isik A, Iskandar K, Ivatury RR, Labbate M, Labricciosa FM, Laterre PF, Latifi R, Lee JG, Lee YR, Leone M, Leppaniemi A, Li Y, Liang SY, Loho T, Maegele M, Malama S, Marei HE, Martin-Loeches I, Marwah S, Massele A, McFarlane M, Melo RB, Negoi I, Nicolau DP, Nord CE, Ofori-Asenso R, Omari AH, Ordonez CA, Ouadii M, Pereira Júnior GA, Piazza D, Pupelis G, Rawson TM, Rems M, Rizoli S, Rocha C, Sakakhushev B, Sanchez-Garcia M, Sato N, Segovia Lohse HA, Sganga G, Siribumrungwong B, Shelat VG, Soreide K, Soto R, Talving P, Tilsed JV, Timsit JF, Trueba G, Trung NT, Ulrych J, van Goor H, Vereczkei A, Vohra RS, Wani I, Uhl W, Xiao Y, Yuan KC, Zachariah SK, Zahar JR, Zakrison TL, Corcione A, Melotti RM, Viscoli C, Viale P. Antimicrobials: a global alliance for optimizing their rational use in intra-abdominal infections (AGORA). World J Emerg Surg 2016; 11:33. [PMID: 27429642 PMCID: PMC4946132 DOI: 10.1186/s13017-016-0089-y] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Accepted: 07/04/2016] [Indexed: 02/08/2023] Open
Abstract
Intra-abdominal infections (IAI) are an important cause of morbidity and are frequently associated with poor prognosis, particularly in high-risk patients. The cornerstones in the management of complicated IAIs are timely effective source control with appropriate antimicrobial therapy. Empiric antimicrobial therapy is important in the management of intra-abdominal infections and must be broad enough to cover all likely organisms because inappropriate initial antimicrobial therapy is associated with poor patient outcomes and the development of bacterial resistance. The overuse of antimicrobials is widely accepted as a major driver of some emerging infections (such as C. difficile), the selection of resistant pathogens in individual patients, and for the continued development of antimicrobial resistance globally. The growing emergence of multi-drug resistant organisms and the limited development of new agents available to counteract them have caused an impending crisis with alarming implications, especially with regards to Gram-negative bacteria. An international task force from 79 different countries has joined this project by sharing a document on the rational use of antimicrobials for patients with IAIs. The project has been termed AGORA (Antimicrobials: A Global Alliance for Optimizing their Rational Use in Intra-Abdominal Infections). The authors hope that AGORA, involving many of the world's leading experts, can actively raise awareness in health workers and can improve prescribing behavior in treating IAIs.
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Affiliation(s)
- Massimo Sartelli
- Department of Surgery, Macerata Hospital, Via Santa Lucia 2, 62100 Macerata, Italy
| | - Dieter G. Weber
- Department of Trauma Surgery, Royal Perth Hospital, Perth, Australia
| | - Etienne Ruppé
- Genomic Research Laboratory, Geneva University Hospitals, Geneva, Switzerland
| | - Matteo Bassetti
- Infectious Diseases Division, Santa Maria Misericordia University Hospital, Udine, Italy
| | - Brian J. Wright
- Department of Emergency Medicine and Surgery, Stony Brook University School of Medicine, Stony Brook, NY USA
| | - Luca Ansaloni
- General Surgery Department, Papa Giovanni XXIII Hospital, Bergamo, Italy
| | - Fausto Catena
- Department of General, Maggiore Hospital, Parma, Italy
| | | | - Fikri M. Abu-Zidan
- Department of Surgery, College of Medicine and Health Sciences, UAE University, Al-Ain, United Arab Emirates
| | - Raul Coimbra
- Department of Surgery, UC San Diego Medical Center, San Diego, USA
| | - Ernest E. Moore
- Department of Surgery, University of Colorado, Denver Health Medical Center, Denver, CO USA
| | - Frederick A. Moore
- Department of Surgery, Division of Acute Care Surgery, and Center for Sepsis and Critical Illness Research, University of Florida College of Medicine, Gainesville, FL USA
| | - Ronald V. Maier
- Department of Surgery, University of Washington, Seattle, WA USA
| | - Jan J. De Waele
- Department of Critical Care Medicine, Ghent University Hospital, Ghent, Belgium
| | - Andrew W. Kirkpatrick
- General, Acute Care, and Trauma Surgery, Foothills Medical Centre, Calgary, AB Canada
| | - Ewen A. Griffiths
- General and Upper GI Surgery, Queen Elizabeth Hospital, Birmingham, UK
| | - Christian Eckmann
- Department of General, Visceral, and Thoracic Surgery, Klinikum Peine, Academic Hospital of Medical University Hannover, Peine, Germany
| | - Adrian J. Brink
- Department of Clinical microbiology, Ampath National Laboratory Services, Milpark Hospital, Johannesburg, South Africa
| | - John E. Mazuski
- Department of Surgery, School of Medicine, Washington University in Saint Louis, Missouri, USA
| | - Addison K. May
- Departments of Surgery and Anesthesiology, Division of Trauma and Surgical Critical Care, Vanderbilt University Medical Center, Nashville, TN USA
| | - Rob G. Sawyer
- Department of Surgery, University of Virginia Health System, Charlottesville, VA USA
| | - Dominik Mertz
- Departments of Medicine, Clinical Epidemiology and Biostatistics, and Pathology and Molecular Medicine, McMaster University, Hamilton, ON Canada
| | - Philippe Montravers
- Département d’Anesthésie-Réanimation, CHU Bichat Claude-Bernard-HUPNVS, Assistance Publique-Hôpitaux de Paris, University Denis Diderot, Paris, France
| | - Anand Kumar
- Section of Critical Care Medicine and Section of Infectious Diseases, Department of Medicine, Medical Microbiology and Pharmacology/Therapeutics, University of Manitoba, Winnipeg, MB Canada
| | - Jason A. Roberts
- Australia Pharmacy Department, Royal Brisbane and Womens’ Hospital; Burns, Trauma, and Critical Care Research Centre, Australia School of Pharmacy, The University of Queensland, Brisbane, QLD Australia
| | - Jean-Louis Vincent
- Department of Intensive Care, Erasme Hospital, Université libre de Bruxelles, Brussels, Belgium
| | - Richard R. Watkins
- Department of Internal Medicine, Division of Infectious Diseases, Akron General Medical Center, Northeast Ohio Medical University, Akron, OH USA
| | - Warren Lowman
- Clinical Microbiology and Infectious Diseases, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Brad Spellberg
- Division of Infectious Diseases, Los Angeles County-University of Southern California (USC) Medical Center, Keck School of Medicine at USC, Los Angeles, CA USA
| | - Iain J. Abbott
- Department of Infectious Diseases, Alfred Hospital, Melbourne, VIC Australia
| | | | - Sara Al-Dahir
- Division of Clinical and Administrative Sciences, College of Pharmacy, Xavier University of Louisiana, New Orleans, LA USA
| | - Majdi N. Al-Hasan
- Department of Medicine, Division of Infectious Diseases, University of South Carolina School of Medicine, Columbia, SC USA
| | | | | | - Shamshul Ansari
- Department of Microbiology, Chitwan Medical College, and Department of Environmental and Preventive Medicine, Oita University, Oita, Japan
| | - Rashid Ansumana
- Centre for Neglected Tropical Diseases, Liverpool School of Tropical Medicine, University of Liverpool, and Mercy Hospital Research Laboratory, Njala University, Bo, Sierra Leone
| | - Goran Augustin
- Department of Surgery, University Hospital Center, Zagreb, Croatia
| | - Miklosh Bala
- Trauma and Acute Care Surgery Unit, Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | - Zsolt J. Balogh
- Department of Traumatology, John Hunter Hospital and University of Newcastle, Newcastle, NSW Australia
| | | | - Aneel Bhangu
- Academic Department of Surgery, Queen Elizabeth Hospital, Birmingham, UK
| | - Marcelo A. Beltrán
- Department of General Surgery, Hospital San Juan de Dios de La Serena, La Serena, Chile
| | | | - Walter L. Biffl
- Department of Surgery, University of Colorado, Denver, CO USA
| | | | - Stephen M. Brecher
- Department of Pathology and Laboratory Medicine, VA Boston HealthCare System, and Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Boston, MA USA
| | - Jill R. Cherry-Bukowiec
- Division of Acute Care Surgery, Department of Surgery, University of Michigan, Ann Arbor, MI USA
| | - Otmar R. Buyne
- Department of Surgery, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Miguel A. Cainzos
- Department of Surgery, Hospital Clínico Universitario, Santiago de Compostela, Spain
| | - Kelly A. Cairns
- Pharmacy Department, Alfred Health, Melbourne, VIC Australia
| | - Adrian Camacho-Ortiz
- Hospital Epidemiology and Infectious Diseases, Hospital Universitario Dr Jose Eleuterio Gonzalez, Monterrey, Mexico
| | - Sujith J. Chandy
- Department of Pharmacology, Pushpagiri Institute of Medical Sciences and Research Centre, Thiruvalla, Kerala India
| | - Asri Che Jusoh
- Department of General Surgery, Kuala Krai Hospital, Kuala Krai, Kelantan Malaysia
| | - Alain Chichom-Mefire
- Department of Surgery and Obstetrics/Gynaecology, Regional Hospital, Limbe, Cameroon
| | - Caroline Colijn
- Department of Mathematics, Imperial College London, London, UK
| | - Francesco Corcione
- Department of Laparoscopic and Robotic Surgery, Colli-Monaldi Hospital, Naples, Italy
| | - Yunfeng Cui
- Department of Surgery, Tianjin Nankai Hospital, Nankai Clinical School of Medicine, Tianjin Medical University, Tianjin, China
| | - Daniel Curcio
- Infectología Institucional SRL, Hospital Municipal Chivilcoy, Buenos Aires, Argentina
| | - Samir Delibegovic
- Department of Surgery, University Clinical Center of Tuzla, Tuzla, Bosnia and Herzegovina
| | - Zaza Demetrashvili
- Department General Surgery, Kipshidze Central University Hospital, Tbilisi, Georgia
| | | | - Sameer Dhingra
- School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Eric Williams Medical Sciences Complex, Uriah Butler Highway, Champ Fleurs, Trinidad and Tobago
| | - José J. Diaz
- Division of Acute Care Surgery, Program in Trauma, R Adams Cowley Shock Trauma Center, University of Maryland, Baltimore, MD USA
| | - Isidoro Di Carlo
- Department of Surgical Sciences, Cannizzaro Hospital, University of Catania, Catania, Italy
| | - Angel Dillip
- Ifakara Health Institute, Dar es Salaam, Tanzania
| | | | - Michael P. Doyle
- Center for Food Safety, Department of Food Science and Technology, University of Georgia, Griffin, GA USA
| | - Gereltuya Dorj
- School of Pharmacy and Biomedicine, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Agron Dogjani
- Department of Surgery, University Hospital of Trauma, Tirana, Albania
| | - Hervé Dupont
- Département d’Anesthésie-Réanimation, CHU Amiens-Picardie, and INSERM U1088, Université de Picardie Jules Verne, Amiens, France
| | - Soumitra R. Eachempati
- Department of Surgery, Division of Burn, Critical Care, and Trauma Surgery (K.P.S., S.R.E.), Weill Cornell Medical College/New York-Presbyterian Hospital, New York, USA
| | - Mushira Abdulaziz Enani
- Department of Medicine, Infectious Disease Division, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Valery N. Egiev
- Department of Surgery, Pirogov Russian National Research Medical University, Moscow, Russian Federation
| | - Mutasim M. Elmangory
- Sudan National Public Health Laboratory, Federal Ministry of Health, Khartoum, Sudan
| | - Paula Ferrada
- Department of Surgery, Virginia Commonwealth University, Richmond, VA USA
| | - Joseph R. Fitchett
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, MA USA
| | - Gustavo P. Fraga
- Division of Trauma Surgery, Department of Surgery, School of Medical Sciences, University of Campinas (Unicamp), Campinas, SP Brazil
| | | | - Helen Giamarellou
- 6th Department of Internal Medicine, Hygeia General Hospital, Athens, Greece
| | - Wagih Ghnnam
- Department of General Surgery, Mansoura Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - George Gkiokas
- 2nd Department of Surgery, Aretaieion University Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | | | - Carlos Augusto Gomes
- Department of Surgery, Hospital Universitário Terezinha de Jesus, Faculdade de Ciências Médicas e da Saúde de Juiz de Fora, Juiz de Fora, Brazil
| | - Harumi Gomi
- Center for Global Health, Mito Kyodo General Hospital, University of Tsukuba, Mito, Ibaraki Japan
| | - Manuel Guzmán-Blanco
- Hospital Privado Centro Médico de Caracas and Hospital Vargas de Caracas, Caracas, Venezuela
| | - Mainul Haque
- Unit of Pharmacology, Faculty of Medicine and Defense Health, National Defence University of Malaysia, Kuala Lumpur, Malaysia
| | - Sonja Hansen
- Institute of Hygiene, Charité-Universitätsmedizin Berlin, Hindenburgdamm 27, 12203 Berlin, Germany
| | - Andreas Hecker
- Department of General and Thoracic Surgery, University Hospital Giessen, Giessen, Germany
| | | | - Torsten Herzog
- Department of Surgery, St. Josef Hospital, Ruhr University Bochum, Bochum, Germany
| | - Adrien Montcho Hodonou
- Department of Surgery, Faculté de médecine, Université de Parakou, BP 123 Parakou, Bénin
| | - Suk-Kyung Hong
- Division of Trauma and Surgical Critical Care, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Reinhold Kafka-Ritsch
- Department of Visceral, Transplant and Thoracic Surgery, Innsbruck Medical University, Innsbruck, Austria
| | - Lewis J. Kaplan
- Department of Surgery Philadelphia VA Medical Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA USA
| | - Garima Kapoor
- Department of Microbiology, Gandhi Medical College, Bhopal, India
| | | | - Martin G. Kees
- Department of Anesthesiology and Intensive Care, Charité Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany
| | - Jakub Kenig
- 3rd Department of General Surgery, Jagiellonian University Medical College, Krakow, Poland
| | - Ronald Kiguba
- Department of Pharmacology and Therapeutics, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Peter K. Kim
- Department of Surgery, Albert Einstein College of Medicine and Jacobi Medical Center, Bronx, NY USA
| | - Yoram Kluger
- Department of General Surgery, Division of Surgery, Rambam Health Care Campus, Haifa, Israel
| | - Vladimir Khokha
- Department of Emergency Surgery, City Hospital, Mozyr, Belarus
| | - Kaoru Koike
- Department of Primary Care and Emergency Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Kenneth Y. Y. Kok
- Department of Surgery, The Brunei Cancer Centre, Jerudong Park, Brunei
| | - Victory Kong
- Department of Surgery, Edendale Hospital, Pietermaritzburg, South Africa
| | - Matthew C. Knox
- School of Medicine, Western Sydney University, Campbelltown, NSW Australia
| | - Kenji Inaba
- Division of Acute Care Surgery and Surgical Critical Care, Department of Surgery, Los Angeles County and University of Southern California Medical Center, University of Southern California, Los Angeles, CA USA
| | - Arda Isik
- Department of General Surgery, Erzincan University, Faculty of Medicine, Erzincan, Turkey
| | - Katia Iskandar
- Department of Pharmacy, Lebanese International University, Beirut, Lebanon
| | - Rao R. Ivatury
- Department of Surgery, Virginia Commonwealth University, Richmond, VA USA
| | - Maurizio Labbate
- School of Life Science and The ithree Institute, University of Technology, Sydney, NSW Australia
| | - Francesco M. Labricciosa
- Department of Biomedical Sciences and Public Health, Unit of Hygiene, Preventive Medicine and Public Health, UNIVMP, Ancona, Italy
| | - Pierre-François Laterre
- Department of Critical Care Medicine, Cliniques Universitaires Saint Luc, Université Catholique de Louvain (UCL), Brussels, Belgium
| | - Rifat Latifi
- Department of Surgery, Division of Trauma, University of Arizona, Tucson, AZ USA
| | - Jae Gil Lee
- Department of Surgery, Yonsei University College of Medicine, Seoul, South Korea
| | - Young Ran Lee
- Texas Tech University Health Sciences Center School of Pharmacy, Abilene, TX USA
| | - Marc Leone
- Department of Anaesthesiology and Critical Care, Hôpital Nord, Assistance Publique-Hôpitaux de Marseille, Aix Marseille Université, Marseille, France
| | - Ari Leppaniemi
- Abdominal Center, University Hospital Meilahti, Helsinki, Finland
| | - Yousheng Li
- Department of Surgery, Inling Hospital, Nanjing University School of Medicine, Nanjing, China
| | - Stephen Y. Liang
- Division of Infectious Diseases, Division of Emergency Medicine, Washington University School of Medicine, St. Louis, MO USA
| | - Tonny Loho
- Division of Infectious Diseases, Department of Clinical Pathology, Faculty of Medicine, University of Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
| | - Marc Maegele
- Department for Traumatology and Orthopedic Surgery, Cologne Merheim Medical Center (CMMC), University of Witten/Herdecke (UW/H), Cologne, Germany
| | - Sydney Malama
- Health Research Program, Institute of Economic and Social Research, University of Zambia, Lusaka, Zambia
| | - Hany E. Marei
- Biomedical Research Center, Qatar University, Doha, Qatar
| | - Ignacio Martin-Loeches
- Multidisciplinary Intensive Care Research Organization (MICRO), Wellcome Trust-HRB Clinical Research, Department of Clinical Medicine, Trinity Centre for Health Sciences, St James’ University Hospital, Dublin, Ireland
| | - Sanjay Marwah
- Department of Surgery, Post-Graduate Institute of Medical Sciences, Rohtak, India
| | - Amos Massele
- Department of Clinical Pharmacology, School of Medicine, University of Botswana, Gaborone, Botswana
| | - Michael McFarlane
- Department of Surgery, Radiology, University Hospital of the West Indies, Kingston, Jamaica
| | - Renato Bessa Melo
- General Surgery Department, Centro Hospitalar de São João, Porto, Portugal
| | - Ionut Negoi
- Department of Surgery, Emergency Hospital of Bucharest, Bucharest, Romania
| | - David P. Nicolau
- Center of Anti-Infective Research and Development, Hartford, CT USA
| | - Carl Erik Nord
- Department of Laboratory Medicine, Division of Clinical Microbiology, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | | | | | - Carlos A. Ordonez
- Department of Surgery and Critical Care, Universidad del Valle, Fundación Valle del Lili, Cali, Colombia
| | - Mouaqit Ouadii
- Department of Surgery, Hassan II University Hospital, Medical School of Fez, Sidi Mohamed Benabdellah University, Fez, Morocco
| | | | - Diego Piazza
- Division of Surgery, Vittorio Emanuele Hospital, Catania, Italy
| | - Guntars Pupelis
- Department of General and Emergency Surgery, Riga East University Hospital ‘Gailezers’, Riga, Latvia
| | - Timothy Miles Rawson
- National Institute for Health Research, Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance, Imperial College London, Hammersmith Campus, London, UK
| | - Miran Rems
- Department of General Surgery, Jesenice General Hospital, Jesenice, Slovenia
| | - Sandro Rizoli
- Trauma and Acute Care Service, St Michael’s Hospital, University of Toronto, Toronto, Canada
| | | | - Boris Sakakhushev
- General Surgery Department, Medical University, University Hospital St George, Plovdiv, Bulgaria
| | | | - Norio Sato
- Department of Primary Care and Emergency Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Helmut A. Segovia Lohse
- II Cátedra de Clínica Quirúrgica, Hospital de Clínicas, Universidad Nacional de Asunción, San Lorenzo, Paraguay
| | - Gabriele Sganga
- Department of Surgery, Catholic University of Sacred Heart, Policlinico A Gemelli, Rome, Italy
| | - Boonying Siribumrungwong
- Department of Surgery, Faculty of Medicine, Thammasat University Hospital, Thammasat University, Pathum Thani, Thailand
| | - Vishal G. Shelat
- Department of General Surgery, Tan Tock Seng Hospital, Tan Tock Seng, Singapore
| | - Kjetil Soreide
- Department of Gastrointestinal Surgery, Stavanger University Hospital, Stavanger, Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Rodolfo Soto
- Department of Emergency Surgery and Critical Care, Centro Medico Imbanaco, Cali, Colombia
| | - Peep Talving
- Department of Surgery, North Estonia Medical Center, Tallinn, Estonia
| | - Jonathan V. Tilsed
- Surgery Health Care Group, Hull and East Yorkshire Hospitals NHS Trust, Hull, UK
| | | | - Gabriel Trueba
- Institute of Microbiology, Biological and Environmental Sciences College, University San Francisco de Quito, Quito, Ecuador
| | - Ngo Tat Trung
- Department of Molecular Biology, Tran Hung Dao Hospital, No 1, Tran Hung Dao Street, Hai Ba Trung Dist, Hanoi, Vietnam
| | - Jan Ulrych
- 1st Department of Surgery - Department of Abdominal, Thoracic Surgery and Traumatology, General University Hospital, Prague, Czech Republic
| | - Harry van Goor
- Department of Surgery, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Andras Vereczkei
- Department of Surgery, Medical School University of Pécs, Pécs, Hungary
| | - Ravinder S. Vohra
- Nottingham Oesophago-Gastric Unit, Nottingham University Hospitals, Nottingham, UK
| | - Imtiaz Wani
- Department of Surgery, Sheri-Kashmir Institute of Medical Sciences, Srinagar, India
| | - Waldemar Uhl
- Department of Surgery, St. Josef Hospital, Ruhr University Bochum, Bochum, Germany
| | - Yonghong Xiao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affilliated Hospital, Zhejiang University, Zhejiang, China
| | - Kuo-Ching Yuan
- Trauma and Emergency Surgery Department, Chang Gung Memorial Hospital, Taoyuan City, Taiwan
| | | | - Jean-Ralph Zahar
- Infection Control Unit, Angers University, CHU d’Angers, Angers, France
| | - Tanya L. Zakrison
- Division of Trauma and Surgical Critical Care, DeWitt Daughtry Family Department of Surgry, University of Miami, Miami, FL USA
| | - Antonio Corcione
- Anesthesia and Intensive Care Unit, AORN dei Colli Vincenzo Monaldi Hospital, Naples, Italy
| | - Rita M. Melotti
- Anesthesiology and Intensive Care Unit, Sant’Orsola University Hospital, Bologna, Italy
| | - Claudio Viscoli
- Infectious Diseases Unit, University of Genoa (DISSAL) and IRCCS San Martino-IST, Genoa, Italy
| | - Perluigi Viale
- Infectious Diseases Unit, Department of Medical and Surgical Sciences, Sant’ Orsola Hospital, University of Bologna, Bologna, Italy
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Dominey-Howes D, Bajorek B, Michael CA, Betteridge B, Iredell J, Labbate M. Applying the emergency risk management process to tackle the crisis of antibiotic resistance. Front Microbiol 2015; 6:927. [PMID: 26388864 PMCID: PMC4559638 DOI: 10.3389/fmicb.2015.00927] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 08/21/2015] [Indexed: 01/21/2023] Open
Abstract
We advocate that antibiotic resistance be reframed as a disaster risk management problem. Antibiotic-resistant infections represent a risk to life as significant as other commonly occurring natural disasters (e.g., earthquakes). Despite efforts by global health authorities, antibiotic resistance continues to escalate. Therefore, new approaches and expertise are needed to manage the issue. In this perspective we: (1) make a call for the emergency management community to recognize the antibiotic resistance risk and join in addressing this problem; (2) suggest using the risk management process to help tackle antibiotic resistance; (3) show why this approach has value and why it is different to existing approaches; and (4) identify public perception of antibiotic resistance as an important issue that warrants exploration.
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Affiliation(s)
- Dale Dominey-Howes
- Asia - Pacific Natural Hazards and Disaster Risk Research Group, The School of Geosciences, The University of Sydney Sydney, NSW, Australia
| | - Beata Bajorek
- The UTS Graduate School of Health, University of Technology Sydney Sydney, NSW, Australia
| | - Carolyn A Michael
- The School of Life Sciences, University of Technology Sydney Sydney, NSW, Australia
| | - Brittany Betteridge
- Asia - Pacific Natural Hazards and Disaster Risk Research Group, The School of Geosciences, The University of Sydney Sydney, NSW, Australia
| | - Jonathan Iredell
- Westmead Millennium Institute for Medical Research and The Marie Bashir Institute, University of Sydney Sydney, NSW, Australia
| | - Maurizio Labbate
- The School of Life Sciences, University of Technology Sydney Sydney, NSW, Australia ; The ithree Institute, University of Technology Sydney Sydney, NSW, Australia
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Labbate M, Boucher Y, Luu I, Chowdhury PR, Stokes HW. Integron associated mobile genes: Just a collection of plug in apps or essential components of cell network hardware? Mob Genet Elements 2014; 2:13-18. [PMID: 22754748 PMCID: PMC3383445 DOI: 10.4161/mge.19510] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Lateral gene transfer (LGT) impacts on the evolution of prokaryotes in both the short and long-term. The short-term impacts of mobilized genes are a concern to humans since LGT explains the global rise of multi drug resistant pathogens seen in the past 70 years. However, LGT has been a feature of prokaryotes from the earliest days of their existence and the concept of a bifurcating tree of life is not entirely applicable to prokaryotes since most genes in extant prokaryotic genomes have probably been acquired from other lineages. Successful transfer and maintenance of a gene in a new host is understandable if it acts independently of cell networks and confers an advantage. Antibiotic resistance provides an example of this whereby a gene can be advantageous in virtually any cell across broad species backgrounds. In a longer evolutionary context however laterally transferred genes can be assimilated into even essential cell networks. How this happens is not well understood and we discuss recent work that identifies a mobile gene, unique to a cell lineage, which is detrimental to the cell when lost. We also present some additional data and believe our emerging model will be helpful in understanding how mobile genes integrate into cell networks.
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Laczka OF, Labbate M, Seymour JR, Bourne DG, Fielder SS, Doblin MA. Surface immuno-functionalisation for the capture and detection of Vibrio species in the marine environment: a new management tool for industrial facilities. PLoS One 2014; 9:e108387. [PMID: 25310801 PMCID: PMC4195594 DOI: 10.1371/journal.pone.0108387] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 08/20/2014] [Indexed: 11/19/2022] Open
Abstract
Bacteria from the genus Vibrio are a common and environmentally important group of bacteria within coastal environments and include species pathogenic to aquaculture organisms. Their distribution and abundance are linked to specific environmental parameters, including temperature, salinity and nutrient enrichment. Accurate and efficient detection of Vibrios in environmental samples provides a potential important indicator of overall ecosystem health while also allowing rapid management responses for species pathogenic to humans or species implicated in disease of economically important aquacultured fish and invertebrates. In this study, we developed a surface immuno-functionalisation protocol, based on an avidin-biotin type covalent binding strategy, allowing specific sandwich-type detection of bacteria from the Vibrio genus. The assay was optimized on 12 diverse Vibrio strains, including species that have implications for aquaculture industries, reaching detection limits between 7×103 to 3×104 cells mL−1. Current techniques for the detection of total Vibrios rely on laborious or inefficient analyses resulting in delayed management decisions. This work represents a novel approach for a rapid, accurate, sensitive and robust tool for quantifying Vibrios directly in industrial systems and in the environment, thereby facilitating rapid management responses.
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Affiliation(s)
- Olivier F. Laczka
- Plant Functional Biology and Climate Change Cluster (C3), University of Technology, Sydney, NSW, Australia
- * E-mail:
| | - Maurizio Labbate
- The ithree institute, University of Technology, Sydney, NSW, Australia
| | - Justin R. Seymour
- Plant Functional Biology and Climate Change Cluster (C3), University of Technology, Sydney, NSW, Australia
| | - David G. Bourne
- Australian Institute for Marine Science, Townsville, QLD, Australia
| | - Stewart S. Fielder
- Port Stephens Fisheries Institute, New South Wales Department of Primary Industries, Taylors Beach, NSW, Australia
| | - Martina A. Doblin
- Plant Functional Biology and Climate Change Cluster (C3), University of Technology, Sydney, NSW, Australia
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Michael CA, Dominey-Howes D, Labbate M. The antimicrobial resistance crisis: causes, consequences, and management. Front Public Health 2014; 2:145. [PMID: 25279369 PMCID: PMC4165128 DOI: 10.3389/fpubh.2014.00145] [Citation(s) in RCA: 421] [Impact Index Per Article: 42.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Accepted: 09/01/2014] [Indexed: 12/31/2022] Open
Abstract
The antimicrobial resistance (AMR) crisis is the increasing global incidence of infectious diseases affecting the human population, which are untreatable with any known antimicrobial agent. This crisis will have a devastating cost on human society as both debilitating and lethal diseases increase in frequency and scope. Three major factors determine this crisis: (1) the increasing frequency of AMR phenotypes among microbes is an evolutionary response to the widespread use of antimicrobials; (2) the large and globally connected human population allows pathogens in any environment access to all of humanity; and (3) the extensive and often unnecessary use of antimicrobials by humanity provides the strong selective pressure that is driving the evolutionary response in the microbial world. Of these factors, the size of the human population is least amenable to rapid change. In contrast, the remaining two factors may be affected, so offering a means of managing the crisis: the rate at which AMR, as well as virulence factors evolve in microbial world may be slowed by reducing the applied selective pressure. This may be accomplished by radically reducing the global use of current and prospective antimicrobials. Current management measures to legislate the use of antimicrobials and to educate the healthcare world in the issues, while useful, have not comprehensively addressed the problem of achieving an overall reduction in the human use of antimicrobials. We propose that in addition to current measures and increased research into new antimicrobials and diagnostics, a comprehensive education program will be required to change the public paradigm of antimicrobial usage from that of a first line treatment to that of a last resort when all other therapeutic options have failed.
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Affiliation(s)
- Carolyn Anne Michael
- School of Medical and Molecular Biosciences, University of Technology , Sydney, NSW , Australia
| | - Dale Dominey-Howes
- Asia - Pacific Natural Hazards Research Group, School of Geosciences, University of Sydney , Sydney, NSW , Australia
| | - Maurizio Labbate
- School of Medical and Molecular Biosciences, University of Technology , Sydney, NSW , Australia ; ithree Institute, University of Technology , Sydney, NSW , Australia
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Rapa RA, Islam A, Monahan LG, Mutreja A, Thomson N, Charles IG, Stokes HW, Labbate M. A genomic island integrated into recA of Vibrio cholerae contains a divergent recA and provides multi-pathway protection from DNA damage. Environ Microbiol 2014; 17:1090-102. [PMID: 24889424 PMCID: PMC4405046 DOI: 10.1111/1462-2920.12512] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 05/13/2014] [Indexed: 11/28/2022]
Abstract
Lateral gene transfer (LGT) has been crucial in the evolution of the cholera pathogen, Vibrio cholerae. The two major virulence factors are present on two different mobile genetic elements, a bacteriophage containing the cholera toxin genes and a genomic island (GI) containing the intestinal adhesin genes. Non-toxigenic V. cholerae in the aquatic environment are a major source of novel DNA that allows the pathogen to morph via LGT. In this study, we report a novel GI from a non-toxigenic V. cholerae strain containing multiple genes involved in DNA repair including the recombination repair gene recA that is 23% divergent from the indigenous recA and genes involved in the translesion synthesis pathway. This is the first report of a GI containing the critical gene recA and the first report of a GI that targets insertion into a specific site within recA. We show that possession of the island in Escherichia coli is protective against DNA damage induced by UV-irradiation and DNA targeting antibiotics. This study highlights the importance of genetic elements such as GIs in the evolution of V. cholerae and emphasizes the importance of environmental strains as a source of novel DNA that can influence the pathogenicity of toxigenic strains.
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Affiliation(s)
- Rita A Rapa
- ithree Institute, University of Technology, PO Box 123 Broadway, Sydney, NSW, 2007, Australia; Department of Medical and Molecular Biosciences, University of Technology, Sydney, NSW, Australia
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Rapa RA, Labbate M. The function of integron-associated gene cassettes in Vibrio species: the tip of the iceberg. Front Microbiol 2013; 4:385. [PMID: 24367362 PMCID: PMC3856429 DOI: 10.3389/fmicb.2013.00385] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 11/25/2013] [Indexed: 12/17/2022] Open
Abstract
The integron is a genetic element that incorporates mobile genes termed gene cassettes into a reserved genetic site via site-specific recombination. It is best known for its role in antibiotic resistance with one type of integron, the class 1 integron, a major player in the dissemination of antibiotic resistance genes across Gram negative pathogens and commensals. However, integrons are ancient structures with over 100 classes (including class 1) present in bacteria from the broader environment. While, the class 1 integron is only one example of an integron being mobilized into the clinical environment, it is by far the most successful. Unlike clinical class 1 integrons which are largely found on plasmids, other integron classes are found on the chromosomes of bacteria and carry diverse gene cassettes indicating a non-antibiotic resistance role(s). However, there is very limited knowledge on what these alternative roles are. This is particularly relevant to Vibrio species where gene cassettes make up approximately 1-3% of their entire genome. In this review, we discuss how emphasis on class 1 integron research has resulted in a limited understanding by the wider research community on the role of integrons in the broader environment. This has the capacity to be counterproductive in solving or improving the antibiotic resistance problem into the future. Furthermore, there is still a significant lack of knowledge on how gene cassettes in Vibrio species drive adaptation and evolution. From research in Vibrio rotiferianus DAT722, new insight into how gene cassettes affect cellular physiology offers new alternative roles for the gene cassette resource. At least a subset of gene cassettes are involved in host surface polysaccharide modification suggesting that gene cassettes may be important in processes such as bacteriophage resistance, adhesion/biofilm formation, protection from grazers and bacterial aggregation.
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Affiliation(s)
- Rita A Rapa
- ithree Institute, University of Technology Sydney, NSW, Australia ; Department of Medical and Molecular Biosciences, University of Technology Sydney, NSW, Australia
| | - Maurizio Labbate
- ithree Institute, University of Technology Sydney, NSW, Australia ; Department of Medical and Molecular Biosciences, University of Technology Sydney, NSW, Australia
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Robinson MW, Buchtmann KA, Jenkins C, Tacchi JL, Raymond BBA, To J, Roy Chowdhury P, Woolley LK, Labbate M, Turnbull L, Whitchurch CB, Padula MP, Djordjevic SP. MHJ_0125 is an M42 glutamyl aminopeptidase that moonlights as a multifunctional adhesin on the surface of Mycoplasma hyopneumoniae. Open Biol 2013; 3:130017. [PMID: 23594879 PMCID: PMC3718333 DOI: 10.1098/rsob.130017] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Bacterial aminopeptidases play important roles in pathogenesis by providing a source of amino acids from exogenous proteins, destroying host immunological effector peptides and executing posttranslational modification of bacterial and host proteins. We show that MHJ_0125 from the swine respiratory pathogen Mycoplasma hyopneumoniae represents a new member of the M42 class of bacterial aminopeptidases. Despite lacking a recognizable signal sequence, MHJ_0125 is detectable on the cell surface by fluorescence microscopy and LC-MS/MS of (i) biotinylated surface proteins captured by avidin chromatography and (ii) peptides released by mild trypsin shaving. Furthermore, surface-associated glutamyl aminopeptidase activity was detected by incubation of live M. hyopneumoniae cells with the diagnostic substrate H-Glu-AMC. MHJ_0125 moonlights as a multifunctional adhesin, binding to both heparin and plasminogen. Native proteomics and comparative modelling studies suggest MHJ_0125 forms a dodecameric, homopolymeric structure and provide insight into the positions of key residues that are predicted to interact with heparin and plasminogen. MHJ_0125 is the first aminopeptidase shown to both bind plasminogen and facilitate its activation by tissue plasminogen activator. Plasmin cleaves host extracellular matrix proteins and activates matrix metalloproteases, generating peptide substrates for MHJ_0125 and a source of amino acids for growth of M. hyopneumoniae. This unique interaction represents a new paradigm in microbial pathogenesis.
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Affiliation(s)
- Mark W Robinson
- Ithree institute, University of Technology, Sydney PO Box 123, Broadway, New South Wales 2007, Australia
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Rapa RA, Shimmon R, Djordjevic SP, Stokes HW, Labbate M. Deletion of integron-associated gene cassettes impact on the surface properties of Vibrio rotiferianus DAT722. PLoS One 2013; 8:e58430. [PMID: 23484028 PMCID: PMC3590141 DOI: 10.1371/journal.pone.0058430] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Accepted: 02/06/2013] [Indexed: 01/21/2023] Open
Abstract
Background The integron is a genetic recombination system that catalyses the acquisition of genes on mobilisable elements called gene cassettes. In Vibrio species, multiple acquired gene cassettes form a cassette array that can comprise 1–3% of the bacterial genome. Since 75% of these gene cassettes contain genes encoding proteins of uncharacterised function, how the integron has driven adaptation and evolution in Vibrio species remains largely unknown. A feature of cassette arrays is the presence of large indels. Using Vibrio rotiferianus DAT722 as a model organism, the aim of this study was to determine how large cassette deletions affect vibrio physiology with a view to improving understanding into how cassette arrays influence bacterial host adaptation and evolution. Methodology/Principal Findings Biological assays and proteomic techniques were utilised to determine how artificially engineered deletions in the cassette array of V. rotiferianus DAT722 affected cell physiology. Multiple phenotypes were identified including changes to growth and expression of outer membrane porins/proteins and metabolic proteins. Furthermore, the deletions altered cell surface polysaccharide with Proton Nuclear Magnetic Resonance on whole cell polysaccharide identifying changes in the carbohydrate ring proton region indicating that gene cassette products may decorate host cell polysaccharide via the addition or removal of functional groups. Conclusions/Significance From this study, it was concluded that deletion of gene cassettes had a subtle effect on bacterial metabolism but altered host surface polysaccharide. Deletion (and most likely rearrangement and acquisition) of gene cassettes may provide the bacterium with a mechanism to alter its surface properties, thus impacting on phenotypes such as biofilm formation. Biofilm formation was shown to be altered in one of the deletion mutants used in this study. Reworking surface properties may provide an advantage to the bacterium’s interactions with organisms such as bacteriophage, protozoan grazers or crustaceans.
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Affiliation(s)
- Rita A. Rapa
- The ithree Institute, University of Technology, Sydney, Australia
| | - Ronald Shimmon
- Chemical Technology and Forensic Science, University of Technology, Sydney, Australia
| | | | - H. W. Stokes
- The ithree Institute, University of Technology, Sydney, Australia
| | - Maurizio Labbate
- The ithree Institute, University of Technology, Sydney, Australia
- * E-mail:
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Islam A, Labbate M, Djordjevic SP, Alam M, Darling A, Melvold J, Holmes AJ, Johura FT, Cravioto A, Charles IG, Stokes HW. Indigenous Vibrio cholerae strains from a non-endemic region are pathogenic. Open Biol 2013; 3:120181. [PMID: 23407641 PMCID: PMC3603452 DOI: 10.1098/rsob.120181] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Of the 200+ serogroups of Vibrio cholerae, only O1 or O139 strains are reported to cause cholera, and mostly in endemic regions. Cholera outbreaks elsewhere are considered to be via importation of pathogenic strains. Using established animal models, we show that diverse V. cholerae strains indigenous to a non-endemic environment (Sydney, Australia), including non-O1/O139 serogroup strains, are able to both colonize the intestine and result in fluid accumulation despite lacking virulence factors believed to be important. Most strains lacked the type three secretion system considered a mediator of diarrhoea in non-O1/O13 V. cholerae. Multi-locus sequence typing (MLST) showed that the Sydney isolates did not form a single clade and were distinct from O1/O139 toxigenic strains. There was no correlation between genetic relatedness and the profile of virulence-associated factors. Current analyses of diseases mediated by V. cholerae focus on endemic regions, with only those strains that possess particular virulence factors considered pathogenic. Our data suggest that factors other than those previously well described are of potential importance in influencing disease outbreaks.
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Affiliation(s)
- Atiqul Islam
- The Ithree Institute, University of Technology, Broadway, Sydney, New South Wales 2007, Australia
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Scott NE, Nothaft H, Edwards AVG, Labbate M, Djordjevic SP, Larsen MR, Szymanski CM, Cordwell SJ. Modification of the Campylobacter jejuni N-linked glycan by EptC protein-mediated addition of phosphoethanolamine. J Biol Chem 2012; 287:29384-96. [PMID: 22761430 DOI: 10.1074/jbc.m112.380212] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Campylobacter jejuni is the major worldwide cause of bacterial gastroenteritis. C. jejuni possesses an extensive repertoire of carbohydrate structures that decorate both protein and non-protein surface-exposed structures. An N-linked glycosylation system encoded by the pgl gene cluster mediates the synthesis of a rigidly conserved heptasaccharide that is attached to protein substrates or released as free oligosaccharide in the periplasm. Removal of N-glycosylation results in reduced virulence and impeded host cell attachment. Since the N-glycan is conserved, the N-glycosylation system is also an attractive option for glycoengineering recombinant vaccines in Escherichia coli. To determine whether non-canonical N-glycans are present in C. jejuni, we utilized high throughput glycoproteomics to characterize C. jejuni JHH1 and identified 93 glycosylation sites, including 34 not previously reported. Interrogation of these data allowed the identification of a phosphoethanolamine (pEtN)-modified variant of the N-glycan that was attached to multiple proteins. The pEtN moiety was attached to the terminal GalNAc of the canonical N-glycan. Deletion of the pEtN transferase eptC removed all evidence of the pEtN-glycan but did not globally influence protein reactivity to patient sera, whereas deletion of the pglB oligosaccharyltransferase significantly reduced reactivity. Transfer of eptC and the pgl gene cluster to E. coli confirmed the addition of the pEtN-glycan to a target C. jejuni protein. Significantly reduced, yet above background levels of pEtN-glycan were also observed in E. coli not expressing eptC, suggesting that endogenous E. coli pEtN transferases can mediate the addition of pEtN to N-glycans. The addition of pEtN must be considered in the context of glycoengineering and may alter C. jejuni glycan-mediated structure-function interactions.
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Affiliation(s)
- Nichollas E Scott
- School of Molecular Bioscience, and Discipline of Pathology (School of Medical Sciences), The University of Sydney, Australia 2006
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Labbate M, Boucher Y, Chowdhury PR, Stokes HW. Integration of a laterally acquired gene into a cell network important for growth in a strain of Vibrio rotiferianus. BMC Microbiol 2011; 11:253. [PMID: 22093957 PMCID: PMC3262767 DOI: 10.1186/1471-2180-11-253] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Accepted: 11/18/2011] [Indexed: 12/02/2022] Open
Abstract
Background Lateral Gene Transfer (LGT) is a major contributor to bacterial evolution and up to 25% of a bacterium's genome may have been acquired by this process over evolutionary periods of time. Successful LGT requires both the physical transfer of DNA and its successful incorporation into the host cell. One system that contributes to this latter step by site-specific recombination is the integron. Integrons are found in many diverse bacterial Genera and is a genetic system ubiquitous in vibrios that captures mobile DNA at a dedicated site. The presence of integron-associated genes, contained within units of mobile DNA called gene cassettes makes up a substantial component of the vibrio genome (1-3%). Little is known about the role of this system since the vast majority of genes in vibrio arrays are highly novel and functions cannot be ascribed. It is generally regarded that strain-specific mobile genes cannot be readily integrated into the cellular machinery since any perturbation of core metabolism is likely to result in a loss of fitness. Results In this study, at least one mobile gene contained within the Vibrio rotiferianus strain DAT722, but lacking close relatives elsewhere, is shown to greatly reduce host fitness when deleted and tested in growth assays. The precise role of the mobile gene product is unknown but impacts on the regulation of outermembrane porins. This demonstrates that strain specific laterally acquired mobile DNA can be integrated rapidly into bacterial networks such that it becomes advantageous for survival and adaptation in changing environments. Conclusions Mobile genes that are highly strain specific are generally believed to act in isolation. This is because perturbation of existing cell machinery by the acquisition of a new gene by LGT is highly likely to lower fitness. In contrast, we show here that at least one mobile gene, apparently unique to a strain, encodes a product that has integrated into central cellular metabolic processes such that it greatly lowers fitness when lost under those conditions likely to be commonly encountered for the free living cell. This has ramifications for our understanding of the role mobile gene encoded products play in the cell from a systems biology perspective.
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Affiliation(s)
- Maurizio Labbate
- The ithree institute, University of Technology, Sydney, Harris Street and Broadway, Sydney, NSW 2007, Australia
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Deshpande CN, Harrop SJ, Boucher Y, Hassan KA, Leo RD, Xu X, Cui H, Savchenko A, Chang C, Labbate M, Paulsen IT, Stokes HW, Curmi PMG, Mabbutt BC. Crystal structure of an integron gene cassette-associated protein from Vibrio cholerae identifies a cationic drug-binding module. PLoS One 2011; 6:e16934. [PMID: 21390267 PMCID: PMC3048380 DOI: 10.1371/journal.pone.0016934] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Accepted: 01/05/2011] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The direct isolation of integron gene cassettes from cultivated and environmental microbial sources allows an assessment of the impact of the integron/gene cassette system on the emergence of new phenotypes, such as drug resistance or virulence. A structural approach is being exploited to investigate the modularity and function of novel integron gene cassettes. METHODOLOGY/PRINCIPAL FINDINGS We report the 1.8 Å crystal structure of Cass2, an integron-associated protein derived from an environmental V. cholerae. The structure defines a monomeric beta-barrel protein with a fold related to the effector-binding portion of AraC/XylS transcription activators. The closest homologs of Cass2 are multi-drug binding proteins, such as BmrR. Consistent with this, a binding pocket made up of hydrophobic residues and a single glutamate side chain is evident in Cass2, occupied in the crystal form by polyethylene glycol. Fluorescence assays demonstrate that Cass2 is capable of binding cationic drug compounds with submicromolar affinity. The Cass2 module possesses a protein interaction surface proximal to its drug-binding cavity with features homologous to those seen in multi-domain transcriptional regulators. CONCLUSIONS/SIGNIFICANCE Genetic analysis identifies Cass2 to be representative of a larger family of independent effector-binding proteins associated with lateral gene transfer within Vibrio and closely-related species. We propose that the Cass2 family not only has capacity to form functional transcription regulator complexes, but represents possible evolutionary precursors to multi-domain regulators associated with cationic drug compounds.
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Affiliation(s)
- Chandrika N. Deshpande
- Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, New South Wales, Australia
| | - Stephen J. Harrop
- School of Physics, University of New South Wales, Sydney, New South Wales, Australia
- St Vincent's Centre for Applied Medical Research, Sydney, New South Wales, Australia
| | - Yan Boucher
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Karl A. Hassan
- Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, New South Wales, Australia
| | - Rosa Di Leo
- Banting and Best Department of Medical Research, University of Toronto, Toronto, Ontario, Canada
| | - Xiaohui Xu
- Banting and Best Department of Medical Research, University of Toronto, Toronto, Ontario, Canada
| | - Hong Cui
- Banting and Best Department of Medical Research, University of Toronto, Toronto, Ontario, Canada
| | - Alexei Savchenko
- Banting and Best Department of Medical Research, University of Toronto, Toronto, Ontario, Canada
| | - Changsoo Chang
- Banting and Best Department of Medical Research, University of Toronto, Toronto, Ontario, Canada
| | - Maurizio Labbate
- Institute for the Biotechnology of Infectious Diseases, University of Technology, Sydney, New South Wales, Australia
| | - Ian T. Paulsen
- Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, New South Wales, Australia
| | - H. W. Stokes
- Institute for the Biotechnology of Infectious Diseases, University of Technology, Sydney, New South Wales, Australia
| | - Paul M. G. Curmi
- School of Physics, University of New South Wales, Sydney, New South Wales, Australia
- St Vincent's Centre for Applied Medical Research, Sydney, New South Wales, Australia
| | - Bridget C. Mabbutt
- Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, New South Wales, Australia
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Abstract
Background The integron/gene cassette system is a diverse and effective adaptive resource for prokaryotes. Short cassette arrays, with less than 10 cassettes adjacent to an integron, provide this resource through the expression of cassette-associated genes by an integron-borne promoter. However, the advantage provided by large arrays containing hundreds of cassettes is less obvious. In this work, using the 116-cassette array of Vibrio sp. DAT722 as a model, we investigated the theory that the majority of genes contained within large cassette arrays are widely expressed by intra-array promoters in addition to the integron-borne promoter. Results We demonstrated that the majority of the cassette-associated genes in the subject array were expressed. We further showed that cassette expression was conditional and that the conditionality varied across the array. We finally showed that this expression was mediated by a diversity of cassette-borne promoters within the array capable of responding to environmental stressors. Conclusions Widespread expression within large gene cassette arrays could provide an adaptive advantage to the host in proportion to the size of the array. Our findings explained the existence and maintenance of large cassette arrays within many prokaryotes. Further, we suggested that repeated rearrangement of cassettes containing genes and/or promoters within large arrays could result in the assembly of operon-like groups of co-expressed cassettes within an array. These findings add to our understanding of the adaptive repertoire of the integron/gene cassette system in prokaryotes and consequently, the evolutionary impact of this system.
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Affiliation(s)
- Carolyn A Michael
- Department of Biological Sciences, Macquarie University, Sydney, NSW, Australia.
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Joss MJ, Koenig JE, Labbate M, Polz MF, Gillings MR, Stokes HW, Doolittle WF, Boucher Y. ACID: annotation of cassette and integron data. BMC Bioinformatics 2009; 10:118. [PMID: 19383137 PMCID: PMC2674596 DOI: 10.1186/1471-2105-10-118] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2008] [Accepted: 04/21/2009] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Although integrons and their associated gene cassettes are present in ~10% of bacteria and can represent up to 3% of the genome in which they are found, very few have been properly identified and annotated in public databases. These genetic elements have been overlooked in comparison to other vectors that facilitate lateral gene transfer between microorganisms. DESCRIPTION By automating the identification of integron integrase genes and of the non-coding cassette-associated attC recombination sites, we were able to assemble a database containing all publicly available sequence information regarding these genetic elements. Specialists manually curated the database and this information was used to improve the automated detection and annotation of integrons and their encoded gene cassettes. ACID (annotation of cassette and integron data) can be searched using a range of queries and the data can be downloaded in a number of formats. Users can readily annotate their own data and integrate it into ACID using the tools provided. CONCLUSION ACID is a community resource providing easy access to annotations of integrons and making tools available to detect them in novel sequence data. ACID also hosts a forum to prompt integron-related discussion, which can hopefully lead to a more universal definition of this genetic element.
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Affiliation(s)
- Michael J Joss
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, 02139, USA.
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40
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Abstract
The integron includes a site-specific recombination system capable of integrating and expressing genes contained in structures called mobile gene cassettes. Integrons were originally identified on mobile elements from pathogenic bacteria and were found to be a major reservoir of antibiotic-resistance genes. Integrons are now known to be ancient structures that are phylogenetically diverse and, to date, have been found in approximately 9% of sequenced bacterial genomes. Overall, gene diversity in cassettes is extraordinarily high, suggesting that the integron/gene cassette system has a broad role in adaptation rather than being confined to simply conferring resistance to antibiotics. In this chapter, we provide a review of the integron/gene cassette system highlighting characteristics associated with this system, diversity of elements contained within it, and their importance in driving bacterial evolution and consequently adaptation. Ideas on the evolution of gene cassettes and gene cassette arrays are discussed.
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Affiliation(s)
- Maurizio Labbate
- Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, NSW, Australia
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Labbate M, Roy Chowdhury P, Stokes HW. A class 1 integron present in a human commensal has a hybrid transposition module compared to Tn402: evidence of interaction with mobile DNA from natural environments. J Bacteriol 2008; 190:5318-27. [PMID: 18502858 PMCID: PMC2493286 DOI: 10.1128/jb.00199-08] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2008] [Accepted: 05/15/2008] [Indexed: 11/20/2022] Open
Abstract
In a survey of class 1 integrons from human stools, an unusual class 1 integron from a strain of Enterobacter cloacae was isolated and characterized in detail. Sequence analysis of a fosmid containing the class 1 integron revealed a complex set of transposons which included two Tn402-like transposons. One of these transposons, Tn6007, included a class 1 integron with two non-antibiotic-resistance-type gene cassettes and a complete transposition module. This tni module is a hybrid with a boundary within the res site compared to Tn402, implying that a site-specific recombination event generated either Tn6007 or Tn402. The second Tn402-like transposon, Tn6008, possesses neither a mer operon nor an integron, and most of its tni module has been deleted. Tn6007, Tn6008, and the 2,478 bases between them, collectively designated Tn6006, have transposed into a Tn5036/Tn3926-like transposon as a single unit. Tn6006, Tn6007, and Tn6008 could all transpose as discrete entities. Database analysis also revealed that a version of Tn6008 was present in the genome of Xanthomonas campestris pv. vesicatoria. Overall, the E. cloacae isolate further demonstrated that functional class 1 integrons/transposons are probably common in bacterial communities and have the potential to add substantially to the problem of multidrug-resistant nosocomial infections.
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Affiliation(s)
- M Labbate
- Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, NSW 2109, Australia.
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Case RJ, Labbate M, Kjelleberg S. AHL-driven quorum-sensing circuits: their frequency and function among the Proteobacteria. ISME J 2008; 2:345-9. [DOI: 10.1038/ismej.2008.13] [Citation(s) in RCA: 214] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Labbate M, Boucher Y, Joss MJ, Michael CA, Gillings MR, Stokes HW. Use of chromosomal integron arrays as a phylogenetic typing system for Vibrio cholerae pandemic strains. Microbiology (Reading) 2007; 153:1488-1498. [PMID: 17464063 DOI: 10.1099/mic.0.2006/001065-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Approximately 200 serogroups of Vibrio cholerae exist, with only two, O1 and O139, responsible for epidemic and pandemic cholera. Strains from these serogroups have evolved from a common progenitor, with lateral gene transfer largely driving their emergence. These strains are so closely related that separation using single- or multi-locus phylogeny has proven difficult. V. cholerae strains contain a genetic system called the integron that is located in the chromosome and that can integrate and excise DNA elements called mobile gene cassettes (MGCs) by site-specific recombination. Large arrays of MGCs are found in V. cholerae strains. For instance, the O1 El Tor strain N16961 contains 179 MGCs. Since integron arrays are dynamic through recombination and excision of MGCs, it was hypothesized that the MGC composition in a given V. cholerae pandemic strain would be useful as a phylogenetic typing system. To address this, a PCR-based method was used to rapidly characterize the MGC composition of V. cholerae arrays. The results showed that the MGC composition of pandemic V. cholerae cassette arrays is relatively conserved, providing further evidence that these strains have evolved from a common progenitor. Comparison of MGC composition between the V. cholerae pandemic strains was also able to resolve the evolution of O139 from a subgroup of O1 El Tor. This level of differentiation of closely related V. cholerae isolates was more sensitive than conventional single-gene phylogeny or multi-locus sequence analysis. Using this method, novel MGCs from an O1 classical strain and an Argentinian O139 isolate were also identified, and a major deletion in the MGC array in all pandemic O139 strains and a subset of O1 El Tor strains was identified. Analysis of sequenced V. cholerae integron arrays showed that their evolution can proceed by rearrangements and deletions/insertions of large portions of MGCs in addition to the insertion or excision of single MGCs.
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Affiliation(s)
- M Labbate
- Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, Australia
| | - Y Boucher
- Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, Australia
| | - M J Joss
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | - C A Michael
- Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, Australia
| | - M R Gillings
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | - H W Stokes
- Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, Australia
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Boucher Y, Labbate M, Koenig JE, Stokes HW. Integrons: mobilizable platforms that promote genetic diversity in bacteria. Trends Microbiol 2007; 15:301-9. [PMID: 17566739 DOI: 10.1016/j.tim.2007.05.004] [Citation(s) in RCA: 205] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2007] [Revised: 04/13/2007] [Accepted: 05/25/2007] [Indexed: 10/23/2022]
Abstract
Integrons facilitate the capture of potentially adaptive exogenous genetic material by their host genomes. It is now clear that integrons are not limited to the clinical contexts in which they were originally discovered because approximately 10% of bacterial genomes that have been partially or completely sequenced harbour this genetic element. This wealth of sequence information has revealed that integrons are not only much more phylogenetically diverse than previously thought but also more mobilizable, with many integrons having been subjected to frequent lateral gene transfer throughout their evolutionary history. This indicates that the genetic characteristics that make integrons such efficient vectors for the spread of antibiotic resistance genes have been associated with these elements since their earliest origins. Here, we give an overview of the structural and phylogenetic diversity of integrons and describe evolutionary events that have contributed to the success of these genetic elements.
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Affiliation(s)
- Yan Boucher
- Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, NSW 2109, Australia
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45
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Labbate M, Zhu H, Thung L, Bandara R, Larsen MR, Willcox MDP, Givskov M, Rice SA, Kjelleberg S. Quorum-sensing regulation of adhesion in Serratia marcescens MG1 is surface dependent. J Bacteriol 2007; 189:2702-11. [PMID: 17237163 PMCID: PMC1855814 DOI: 10.1128/jb.01582-06] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2006] [Accepted: 01/05/2007] [Indexed: 11/20/2022] Open
Abstract
Serratia marcescens is an opportunistic pathogen and a major cause of ocular infections. In previous studies of S. marcescens MG1, we showed that biofilm maturation and sloughing were regulated by N-acyl homoserine lactone (AHL)-based quorum sensing (QS). Because of the importance of adhesion in initiating biofilm formation and infection, the primary goal of this study was to determine whether QS is important in adhesion to both abiotic and biotic surfaces, as assessed by determining the degree of attachment to hydrophilic tissue culture plates and human corneal epithelial (HCE) cells. Our results demonstrate that while adhesion to the abiotic surface was AHL regulated, adhesion to the HCE cell biotic surface was not. Type I fimbriae were identified as the critical adhesin for non-QS-mediated attachment to the biotic HCE cell surface but played no role in adhesion to the abiotic surface. While we were not able to identify a single QS-regulated adhesin essential for attachment to the abiotic surface, four AHL-regulated genes involved in adhesion to the abiotic surface were identified. Interestingly, two of these genes, bsmA and bsmB, were also shown to be involved in adhesion to the biotic surface in a non-QS-controlled fashion. Therefore, the expression of these two genes appears to be cocontrolled by regulators other than the QS system for mediation of attachment to HCE cells. We also found that QS in S. marcescens regulates other potential cell surface adhesins, including exopolysaccharide and the outer membrane protein OmpX. We concluded that S. marcescens MG1 utilizes different regulatory systems and adhesins in attachment to biotic and abiotic surfaces and that QS is a main regulatory pathway in adhesion to an abiotic surface but not in adhesion to a biotic surface.
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Affiliation(s)
- Maurizio Labbate
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
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Koh KS, Lam KW, Alhede M, Queck SY, Labbate M, Kjelleberg S, Rice SA. Phenotypic diversification and adaptation of Serratia marcescens MG1 biofilm-derived morphotypes. J Bacteriol 2006; 189:119-30. [PMID: 17071749 PMCID: PMC1797207 DOI: 10.1128/jb.00930-06] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We report here the characterization of dispersal variants from microcolony-type biofilms of Serratia marcescens MG1. Biofilm formation proceeds through a reproducible process of attachment, aggregation, microcolony development, hollow colony formation, and dispersal. From the time when hollow colonies were observed in flow cell biofilms after 3 to 4 days, at least six different morphological colony variants were consistently isolated from the biofilm effluent. The timing and pattern of variant formation were found to follow a predictable sequence, where some variants, such as a smooth variant with a sticky colony texture (SSV), could be consistently isolated at the time when mature hollow colonies were observed, whereas a variant that produced copious amounts of capsular polysaccharide (SUMV) was always isolated at late stages of biofilm development and coincided with cell death and biofilm dispersal or sloughing. The morphological variants differed extensively from the wild type in attachment, biofilm formation, and cell ultrastructure properties. For example, SSV formed two- to threefold more biofilm biomass than the wild type in batch biofilm assays, despite having a similar growth rate and attachment capacity. Interestingly, the SUMV, and no other variants, was readily isolated from an established SSV biofilm, indicating that the SUMV is a second-generation genetic variant derived from SSV. Planktonic cultures showed significantly lower frequencies of variant formation than the biofilms (5.05 x 10(-8) versus 4.83 x 10(-6), respectively), suggesting that there is strong, diversifying selection occurring within biofilms and that biofilm dispersal involves phenotypic radiation with divergent phenotypes.
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Affiliation(s)
- Kai Shyang Koh
- The Centre for Marine Biofouling and Bio-Innovation, The University of New South Wales, Sydney, NSW 2052, Australia, The School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia, Center for Biomedical Microbiology, BioCentrum-DTU, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Kin Wai Lam
- The Centre for Marine Biofouling and Bio-Innovation, The University of New South Wales, Sydney, NSW 2052, Australia, The School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia, Center for Biomedical Microbiology, BioCentrum-DTU, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Morten Alhede
- The Centre for Marine Biofouling and Bio-Innovation, The University of New South Wales, Sydney, NSW 2052, Australia, The School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia, Center for Biomedical Microbiology, BioCentrum-DTU, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Shu Yeong Queck
- The Centre for Marine Biofouling and Bio-Innovation, The University of New South Wales, Sydney, NSW 2052, Australia, The School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia, Center for Biomedical Microbiology, BioCentrum-DTU, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Maurizio Labbate
- The Centre for Marine Biofouling and Bio-Innovation, The University of New South Wales, Sydney, NSW 2052, Australia, The School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia, Center for Biomedical Microbiology, BioCentrum-DTU, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Staffan Kjelleberg
- The Centre for Marine Biofouling and Bio-Innovation, The University of New South Wales, Sydney, NSW 2052, Australia, The School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia, Center for Biomedical Microbiology, BioCentrum-DTU, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
- Corresponding author. Mailing address: The School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia. Phone: 61-2-9385-2102. Fax: 61-2-9385-1779. E-mail:
| | - Scott A. Rice
- The Centre for Marine Biofouling and Bio-Innovation, The University of New South Wales, Sydney, NSW 2052, Australia, The School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia, Center for Biomedical Microbiology, BioCentrum-DTU, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
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Rice SA, Koh KS, Queck SY, Labbate M, Lam KW, Kjelleberg S. Biofilm formation and sloughing in Serratia marcescens are controlled by quorum sensing and nutrient cues. J Bacteriol 2005; 187:3477-85. [PMID: 15866935 PMCID: PMC1111991 DOI: 10.1128/jb.187.10.3477-3485.2005] [Citation(s) in RCA: 168] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We describe here a role for quorum sensing in the detachment, or sloughing, of Serratia marcescens filamentous biofilms, and we show that nutrient conditions affect the biofilm morphotype. Under reduced carbon or nitrogen conditions, S. marcescens formed a classical biofilm consisting of microcolonies. The filamentous biofilm could be converted to a microcolony-type biofilm by switching the medium after establishment of the biofilm. Similarly, when initially grown as a microcolony biofilm, S. marcescens could be converted back to a filamentous biofilm by increasing the nutrient composition. Under high-nutrient conditions, an N-acyl homoserine lactone quorum-sensing mutant formed biofilms that were indistinguishable from the wild-type biofilms. Similarly, other quorum-sensing-dependent behaviors, such as swarming motility, could be rendered quorum sensing independent by manipulating the growth medium. Quorum sensing was also found to be involved in the sloughing of the filamentous biofilm. The biofilm formed by the bacterium consistently sloughed from the substratum after approximately 75 to 80 h of development. The quorum-sensing mutant, when supplemented with exogenous signal, formed a wild-type filamentous biofilm and sloughed at the same time as the wild type, and this was independent of surfactant production. When we removed the signal from the quorum-sensing mutant prior to the time of sloughing, the biofilm did not undergo significant detachment. Together, the data suggest that biofilm formation by S. marcescens is a dynamic process that is controlled by both nutrient cues and the quorum-sensing system.
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Affiliation(s)
- S A Rice
- The Centre for Marine Biofouling and Bio-Innovation, The University of New South Wales, Sydney, NSW 2052 Australia
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48
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Abstract
Serratia liquefaciens MG1 contains an N-acylhomoserine lactone-mediated quorum-sensing system that is known to regulate swarming motility colonization. In this study, we describe for S. liquefaciens MG1 the development of a novel biofilm consisting of cell aggregates and differentiated cell types, such as cell chains and long filamentous cells. Furthermore, quorum sensing is shown to be crucial for normal biofilm development and for elaborate differentiation. A mutant of S. liquefaciens MG1 that was incapable of synthesizing extracellular signal formed a thin and nonmature biofilm lacking cell aggregates and differentiated cell chains. Signal-based complementation of this mutant resulted in a biofilm with the wild-type architecture. Two quorum-sensing-regulated genes (bsmA and bsmB) involved in biofilm development were identified, and we propose that these genes are engaged in fine-tuning the formation of cell aggregates at a specific point in biofilm development.
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Affiliation(s)
- Maurizio Labbate
- School of Biotechnology and Biomolecular Sciences, Centre for Marine Biofouling and Bio-Innovation, University of New South Wales, Sydney, New South Wales, Australia
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