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Klopper KB, Bester E, van Schalkwyk M, Wolfaardt GM. Mixed species biofilms act as planktonic cell factories despite isothiazolinone exposure under continuous-flow conditions. ENVIRONMENTAL MICROBIOLOGY REPORTS 2024; 16:e70010. [PMID: 39351641 PMCID: PMC11443163 DOI: 10.1111/1758-2229.70010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Accepted: 08/30/2024] [Indexed: 10/04/2024]
Abstract
The primary approach to managing biofouling in industrial water systems involves the large-scale use of biocides. It is well-established that biofilms are 'cell factories' that release planktonic cells even when challenged with antimicrobials. The effect of isothiazolinone on the metabolic activity and biomass of mixed Pseudomonas biofilms was monitored in real-time using the CEMS-BioSpec system. The exposure of biofilms to the minimum inhibitory concentration (1.25 mg L-1) of biocide did not impact planktonic cell production (log 7.5 CFU mL-1), while whole-biofilm metabolic activity and biomass accumulation increased. Only the maximum biocide concentration (80 mg L-1) resulted in a change in planktonic cell yields and temporal inhibition of biofilm activity and biomass, a factor that needs due consideration in view of dilution in industrial settings. Interfacing the real-time measurement of metabolic activity and biomass with dosing systems is especially relevant to optimizing the use of biocides in industrial water systems.
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Affiliation(s)
- Kyle B. Klopper
- Department of MicrobiologyStellenbosch UniversityStellenboschSouth Africa
| | - Elanna Bester
- Department of MicrobiologyStellenbosch UniversityStellenboschSouth Africa
| | | | - Gideon M. Wolfaardt
- Department of MicrobiologyStellenbosch UniversityStellenboschSouth Africa
- Department of Chemistry and BiologyToronto Metropolitan UniversityTorontoOntarioCanada
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2
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Sachdeva S, Sarethy IP. Diving into freshwater microbial metabolites: Pioneering research and future prospects. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2024:1-19. [PMID: 38887995 DOI: 10.1080/09603123.2024.2351153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 04/30/2024] [Indexed: 06/20/2024]
Abstract
In practically every facet of life, especially nutrition, agriculture, and healthcare, microorganisms offer a prospective origin for abundant natural substances and products. Among these microorganisms, bacteria also possess the capability to rapidly acclimate to diverse environments, utilize varied resources, and effectively respond to environmental fluctuations, including those influenced by human activities like pollution and climate change. The ever-changing environment of freshwater bodies influences bacterial communities, offering opportunities for improving health and environmental conservation that remain unexplored. Herein, the study discusses the bacterial taxa along with specialised metabolites with antioxidant, antibacterial, and anticancer activity that have been identified from freshwater environments, thus achieving Sustainable Development Goals addressing health and wellbeing (SDG-3), economic growth (SDG-8) along with industrial development (SDG-9). The present review is intended as a compendium for research teams working in the fields of medicinal chemistry, organic chemistry, clinical research, and natural product chemistry.
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Affiliation(s)
- Saloni Sachdeva
- Department of Biotechnology, Jaypee Institute of Information Technology, Noida, India
| | - Indira P Sarethy
- Department of Biotechnology, Jaypee Institute of Information Technology, Noida, India
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3
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Ranjit S, Deblais L, Poelstra JW, Bhandari M, Rotondo F, Scaria J, Miller SA, Rajashekara G. In vitro, in planta, and comparative genomic analyses of Pseudomonas syringae pv. syringae strains of pepper ( Capsicum annuum var. annuum). Microbiol Spectr 2024; 12:e0006424. [PMID: 38712940 PMCID: PMC11237606 DOI: 10.1128/spectrum.00064-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Accepted: 04/15/2024] [Indexed: 05/08/2024] Open
Abstract
Pseudomonas syringae pv. syringae (Pss) is an emerging phytopathogen that causes Pseudomonas leaf spot (PLS) disease in pepper plants. Pss can cause serious economic damage to pepper production, yet very little is known about the virulence factors carried by Pss that cause disease in pepper seedlings. In this study, Pss strains isolated from pepper plants showing PLS symptoms in Ohio between 2013 and 2021 (n = 16) showed varying degrees of virulence (Pss populations and disease symptoms on leaves) on 6-week-old pepper seedlings. In vitro studies assessing growth in nutrient-limited conditions, biofilm production, and motility also showed varying degrees of virulence, but in vitro and in planta variation in virulence between Pss strains did not correlate. Comparative whole-genome sequencing studies identified notable virulence genes including 30 biofilm genes, 87 motility genes, and 106 secretion system genes. Additionally, a total of 27 antimicrobial resistance genes were found. A multivariate correlation analysis and Scoary analysis based on variation in gene content (n = 812 variable genes) and single nucleotide polymorphisms within virulence genes identified no significant correlations with disease severity, likely due to our limited sample size. In summary, our study explored the virulence and antimicrobial gene content of Pss in pepper seedlings as a first step toward understanding the virulence and pathogenicity of Pss in pepper seedlings. Further studies with additional pepper Pss strains will facilitate defining genes in Pss that correlate with its virulence in pepper seedlings, which can facilitate the development of effective measures to control Pss in pepper and other related P. syringae pathovars. IMPORTANCE Pseudomonas leaf spot (PLS) caused by Pseudomonas syringae pv. syringae (Pss) causes significant losses to the pepper industry. Highly virulent Pss strains under optimal environmental conditions (cool-moderate temperatures, high moisture) can cause severe necrotic lesions on pepper leaves that consequently can decrease pepper yield if the disease persists. Hence, it is important to understand the virulence mechanisms of Pss to be able to effectively control PLS in peppers. In our study, in vitro, in planta, and whole-genome sequence analyses were conducted to better understand the virulence and pathogenicity characteristics of Pss strains in peppers. Our findings fill a knowledge gap regarding potential virulence and pathogenicity characteristics of Pss in peppers, including virulence and antimicrobial gene content. Our study helps pave a path to further identify the role of specific virulence genes in causing disease in peppers, which can have implications in developing strategies to effectively control PLS in peppers.
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Affiliation(s)
- Sochina Ranjit
- Department of Animal Sciences, The Ohio State University, Wooster, Ohio, USA
| | - Loïc Deblais
- Department of Animal Sciences, The Ohio State University, Wooster, Ohio, USA
| | | | - Menuka Bhandari
- Department of Animal Sciences, The Ohio State University, Wooster, Ohio, USA
| | - Francesca Rotondo
- Department of Plant Pathology, The Ohio State University, Wooster, Ohio, USA
| | - Joy Scaria
- Department of Veterinary Pathobiology, Oklahoma State University, Stillwater, Oklahoma, USA
| | - Sally A. Miller
- Department of Plant Pathology, The Ohio State University, Wooster, Ohio, USA
| | - Gireesh Rajashekara
- Department of Animal Sciences, The Ohio State University, Wooster, Ohio, USA
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Tuytschaevers S, Aden L, Greene Z, Nixon C, Shaw W, Hatch D, Kumar G, Miranda RR, Hudson AO. Isolation, whole-genome sequencing, and annotation of two antibiotic-producing and antibiotic-resistant bacteria, Pantoea rodasii RIT 836 and Pseudomonas endophytica RIT 838, collected from the environment. PLoS One 2024; 19:e0293943. [PMID: 38412159 PMCID: PMC10898753 DOI: 10.1371/journal.pone.0293943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 10/22/2023] [Indexed: 02/29/2024] Open
Abstract
Antimicrobial resistance (AMR) is a global threat to human health since infections caused by antimicrobial-resistant bacteria are life-threatening conditions with minimal treatment options. Bacteria become resistant when they develop the ability to overcome the compounds that are meant to kill them, i.e., antibiotics. The increasing number of resistant pathogens worldwide is contrasted by the slow progress in the discovery and production of new antibiotics. About 700,000 global deaths per year are estimated as a result of drug-resistant infections, which could escalate to nearly 10 million by 2050 if we fail to address the AMR challenge. In this study, we collected and isolated bacteria from the environment to screen for antibiotic resistance. We identified several bacteria that showed resistance to multiple clinically relevant antibiotics when tested in antibiotic susceptibility disk assays. We also found that two strains, identified as Pantoea rodasii RIT 836 and Pseudomonas endophytica RIT 838 via whole genome sequencing and annotation, produce bactericidal compounds against both Gram-positive and Gram-negative bacteria in disc-diffusion inhibitory assays. We mined the two strains' whole-genome sequences to gain more information and insights into the antibiotic resistance and production by these bacteria. Subsequently, we aim to isolate, identify, and further characterize the novel antibiotic compounds detected in our assays and bioinformatics analysis.
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Affiliation(s)
- Serena Tuytschaevers
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, New York, United States of America
| | - Leila Aden
- Rochester Prep High School, Rochester, New York, United States of America
| | - Zacchaeus Greene
- Rochester Prep High School, Rochester, New York, United States of America
| | - Chanei Nixon
- Rochester Prep High School, Rochester, New York, United States of America
| | - Wade Shaw
- Rochester Prep High School, Rochester, New York, United States of America
| | - Dillan Hatch
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, New York, United States of America
| | - Girish Kumar
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, New York, United States of America
| | - Renata Rezende Miranda
- School of Chemistry and Materials Science, Rochester Institute of Technology, Rochester, New York, United States of America
| | - André O. Hudson
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, New York, United States of America
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5
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Klopper KB, Bester E, van Schalkwyk M, Wolfaardt GM. Highlighting the limitations of static microplate biofilm assays for industrial biocide effectiveness compared to dynamic flow conditions. ENVIRONMENTAL MICROBIOLOGY REPORTS 2024; 16:e13214. [PMID: 38015101 PMCID: PMC10866068 DOI: 10.1111/1758-2229.13214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 11/01/2023] [Indexed: 11/29/2023]
Abstract
The minimal inhibitory concentration of an antimicrobial required to inhibit the growth of planktonic populations (minimum inhibitory concentration [MIC]) remains the 'gold standard' even though biofilms are acknowledged to be recalcitrant to concentrations that greatly exceed the MIC. As a result, most studies focus on biofilm tolerance to high antimicrobial concentrations, whereas the effect of environmentally relevant sub-MIC on biofilms is neglected. The effect of the MIC and sub-MIC of an isothiazolinone biocide on a microbial community isolated from an industrial cooling system was assessed under static and flow conditions. The differential response of planktonic and sessile populations to these biocide concentrations was discerned by modifying the broth microdilution assay. However, the end-point analysis of biofilms cultivated in static microplates obscured the effect of sub-MIC and MIC on biofilms. A transition from batch to the continuous flow system revealed a more nuanced response of biofilms to these biocide concentrations, where biofilm-derived planktonic cell production was maintained despite an increase in the frequency and extent of biofilm sloughing. A holistic, 'best of both worlds' approach that combines the use of static and continuous flow systems is useful to investigate the potential for the development of persistent biofilms under conditions where exposure to sub-MIC and MIC may occur.
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Affiliation(s)
- Kyle B. Klopper
- Department of MicrobiologyStellenbosch UniversityStellenboschSouth Africa
| | - Elanna Bester
- Department of MicrobiologyStellenbosch UniversityStellenboschSouth Africa
| | | | - Gideon M. Wolfaardt
- Department of MicrobiologyStellenbosch UniversityStellenboschSouth Africa
- Department of Chemistry and BiologyToronto Metropolitan UniversityTorontoOntarioCanada
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6
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Isolation, Whole-Genome Sequencing, and Annotation of Two Antibiotic-Producing and -Resistant Bacteria, Enterobacter roggenkampii RIT 834 and Acinetobacter pittii RIT 835, from Disposable Masks Collected from the Environment. Microbiol Resour Announc 2022; 11:e0075722. [PMID: 36094212 PMCID: PMC9583802 DOI: 10.1128/mra.00757-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We report the whole-genome sequence and annotation of two antibiotic-resistant bacteria, Enterobacter roggenkampii RIT 834 and Acinetobacter pittii RIT 835, isolated from disposed masks. We found that these strains are resistant to five of seven commonly used antibiotics and that they produce bactericidal compounds against Escherichia coli.
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Draft Genome Sequences of Three Antibiotic-Producing Soil Bacteria, Staphylococcus pasteuri WAM01, Peribacillus butanolivorans WAM04, and Micrococcus yunnanensis WAM06, with Growth-Inhibiting Effects against Commensal
Neisseria
Strains. Microbiol Resour Announc 2022; 11:e0062722. [PMID: 36094179 PMCID: PMC9583798 DOI: 10.1128/mra.00627-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We report the isolation, identification, and assemblies of three antibiotic-producing soil bacteria (
Staphylococcus pasteuri
,
Peribacillus butanolivorans
, and
Micrococcus yunnanensis
) that inhibit the growth of
Neisseria
commensals in coculture. With pathogenic
Neisseria
strains becoming increasingly resistant to antibiotics, bioprospecting for novel antimicrobials using commensal relatives may facilitate discovery of clinically useful drugs.
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Parthasarathy A, Miranda RR, Eddingsaas NC, Chu J, Freezman IM, Tyler AC, Hudson AO. Polystyrene Degradation by Exiguobacterium sp. RIT 594: Preliminary Evidence for a Pathway Containing an Atypical Oxygenase. Microorganisms 2022; 10:1619. [PMID: 36014041 PMCID: PMC9416434 DOI: 10.3390/microorganisms10081619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/06/2022] [Accepted: 08/07/2022] [Indexed: 11/16/2022] Open
Abstract
The widespread use of plastics has led to their increasing presence in the environment and subsequent pollution. Some microorganisms degrade plastics in natural ecosystems and the associated metabolic pathways can be studied to understand the degradation mechanisms. Polystyrene (PS) is one of the more recalcitrant plastic polymers that is degraded by only a few bacteria. Exiguobacterium is a genus of Gram-positive poly-extremophilic bacteria known to degrade PS, thus being of biotechnological interest, but its biochemical mechanisms of degradation have not yet been elucidated. Based solely on genome annotation, we initially proposed PS degradation by Exiguobacterium sp. RIT 594 via depolymerization and epoxidation catalyzed by a ring epoxidase. However, Fourier transform infrared (FTIR) spectroscopy analysis revealed an increase of carboxyl and hydroxyl groups with biodegradation, as well as of unconjugated C-C double bonds, both consistent with dearomatization of the styrene ring. This excludes any aerobic pathways involving side chain epoxidation and/or hydroxylation. Subsequent experiments confirmed that molecular oxygen is critical to PS degradation by RIT 594 because degradation ceased under oxygen-deprived conditions. Our studies suggest that styrene breakdown by this bacterium occurs via the sequential action of two enzymes encoded in the genome: an orphan aromatic ring-cleaving dioxygenase and a hydrolase.
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Affiliation(s)
- Anutthaman Parthasarathy
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, NY 14623, USA
- School of Chemistry and Biosciences, University of Bradford, Bradford BD7 1DP, UK
| | - Renata Rezende Miranda
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, NY 14623, USA
| | - Nathan C. Eddingsaas
- School of Chemistry and Materials Science, Rochester Institute of Technology, Rochester, NY 14623, USA
| | - Jonathan Chu
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, NY 14623, USA
| | - Ian M. Freezman
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, NY 14623, USA
| | - Anna C. Tyler
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, NY 14623, USA
| | - André O. Hudson
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, Rochester, NY 14623, USA
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9
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Phukon LC, Chourasia R, Padhi S, Abedin MM, Godan TK, Parameswaran B, Singh SP, Rai AK. Cold-adaptive traits identified by comparative genomic analysis of a lipase-producing Pseudomonas sp. HS6 isolated from snow-covered soil of Sikkim Himalaya and molecular simulation of lipase for wide substrate specificity. Curr Genet 2022; 68:375-391. [PMID: 35532798 DOI: 10.1007/s00294-022-01241-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/16/2022] [Accepted: 04/17/2022] [Indexed: 11/26/2022]
Abstract
The genomic analysis of industrially important bacteria can help in understanding their capability to withstand extreme environments and shed light on their metabolic capabilities. The whole genome of a previously reported broad temperature active lipase-producing Pseudomonas sp. HS6, isolated from snow-covered soil of the Sikkim Himalayan Region, was analyzed to understand the capability of the bacterium to withstand cold temperatures and study its lipolytic nature. Pseudomonas sp. HS6 was found to be psychrotolerant with an optimal growth temperature ranging between 25 and 30 °C, with the ability to grow at 5 °C. The genome harbours various cold-adaptation genes, such as cold-shock proteins, fatty acid alteration, and cold stress-tolerance genes, supporting the psychrotolerant nature of the organism. The comparative analysis of Pseudomonas sp. HS6 genome showed the presence of amino acid substitutions in genes that favor efficient functioning and flexibility at cold temperatures. Genome mining revealed the presence of four triacylglycerol lipases, among which the putative lipase 3 was highly similar to the broad temperature-active lipase purified and characterized in our previous study. In silico studies of putative lipase 3 revealed broad substrate specificity with partial and no inhibition of the enzyme activity in the presence of PMSF and orlistat. The presence of genes associated with cold adaptations and true lipases with activity at broad temperature and substrate specificity in the genome of Pseudomonas sp. HS6 makes this bacterium a suitable candidate for industrial applications.
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Affiliation(s)
- Loreni Chiring Phukon
- Institute of Bioresources and Sustainable Development, Regional Centre, Tadong, Sikkim, India
| | - Rounak Chourasia
- Institute of Bioresources and Sustainable Development, Regional Centre, Tadong, Sikkim, India
| | - Srichandan Padhi
- Institute of Bioresources and Sustainable Development, Regional Centre, Tadong, Sikkim, India
| | - Md Minhajul Abedin
- Institute of Bioresources and Sustainable Development, Regional Centre, Tadong, Sikkim, India
| | | | - Binod Parameswaran
- CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala, India
| | - Sudhir P Singh
- Center of Innovative and Applied Bioprocessing, SAS Nagar, Mohali, India
| | - Amit Kumar Rai
- Institute of Bioresources and Sustainable Development, Regional Centre, Tadong, Sikkim, India.
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10
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Isolation, Whole-Genome Sequencing, and Annotation of Three Unclassified Antibiotic-Producing Bacteria, Enterobacter sp. Strain RIT 637, Pseudomonas sp. Strain RIT 778, and Deinococcus sp. Strain RIT 780. Microbiol Resour Announc 2021; 10:e0086321. [PMID: 34854720 PMCID: PMC8638586 DOI: 10.1128/mra.00863-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
We report the isolation, whole-genome sequencing, and annotation of Enterobacter sp. strain RIT 637, Pseudomonas sp. strain RIT 778, and Deinococcus sp. strain RIT 780. Disk diffusion assays using spent medium demonstrated that all bacteria produced bactericidal compounds against Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, and Staphylococcus aureus ATCC 25923.
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11
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Ali A, Tariq H, Abbas S, Arshad M, Li S, Dong L, Li L, Li WJ, Ahmed I. Draft genome sequence of a multidrug-resistant novel candidate Pseudomonas sp. NCCP-436 T isolated from faeces of a bovine host in Pakistan. J Glob Antimicrob Resist 2021; 27:91-94. [PMID: 34492399 DOI: 10.1016/j.jgar.2021.08.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 08/05/2021] [Accepted: 08/19/2021] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVES Here we describe the first draft genome analysis of a CRISPR-carrying, multidrug-resistant, candidate novel Pseudomonas sp. NCCP-436T isolated from faeces of a neonatal diarrhoeic calf. METHODS The genome of strain NCCP-436T was sequenced using an Illumina NovaSeq PE150 platform and analysed using various bioinformatic tools. The virulence factors and resistome were identified using PATRIC and CARD servers, while CGView Server was used to construct a circular genome map. Antimicrobial susceptibility was determined by the disk diffusion technique. RESULTS The draft genome of strain NCCP-436T contains 43 contigs with a total genome size of 3,683,517 bp (61.4% GC content). There are 3,452 predicted genes, including 60 tRNAs, 7 rRNAs and 12 sRNAs. CRISPR analysis revealed two CRISPR arrays with lengths of 1103 bp and 867 bp. Strain NCCP-436T was highly resistant to fluoroquinolone, β-lactam, cephalosporin, aminoglycoside, penicillin, rifamycin, macrolide, glycopeptide, trimethoprim/sulfonamide and tetracycline antibiotic classes. Additionally, 22 antibiotic resistance genes, 313 virulence genes and 253 pathogen-host interactor genes were predicted. Comparison of the average nucleotide identity and digital DNA-DNA hybridisation values with the closely-related strain Pseudomonas khazarica (TBZ2) was found to be 82.08% and 34.90%, respectively, illustrating strain NCCP-436T as a potentially new species of Pseudomonas. CONCLUSION Substantial number of antibiotic resistance and virulence genes and homology with human pathogens were predicted, exposing the pathogenic and zoonotic potential of strain NCCP-436T to public health. These findings may be used to better understand the genomic epidemiological features and drug resistance mechanisms of pathogenic Pseudomonas spp. in Pakistan.
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Affiliation(s)
- Ahmad Ali
- National Culture Collection of Pakistan (NCCP), Bio-resources Conservation Institute (BCI), National Agricultural Research Centre (NARC), Park Road, Islamabad, Pakistan
| | - Hamza Tariq
- National Culture Collection of Pakistan (NCCP), Bio-resources Conservation Institute (BCI), National Agricultural Research Centre (NARC), Park Road, Islamabad, Pakistan
| | - Saira Abbas
- Department of Zoology, University of Science and Technology, Bannu, Pakistan
| | - Muhammad Arshad
- Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Science and Technology (NUST), Islamabad, Pakistan
| | - Shuai Li
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
| | - Lei Dong
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
| | - Li Li
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, PR China
| | - Wen-Jun Li
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China; State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, PR China
| | - Iftikhar Ahmed
- National Culture Collection of Pakistan (NCCP), Bio-resources Conservation Institute (BCI), National Agricultural Research Centre (NARC), Park Road, Islamabad, Pakistan.
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12
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Cavanaugh NT, Parthasarathy A, Wong NH, Steiner KK, Chu J, Adjei J, Hudson AO. Exiguobacterium sp. is endowed with antibiotic properties against Gram positive and negative bacteria. BMC Res Notes 2021; 14:230. [PMID: 34103082 PMCID: PMC8186047 DOI: 10.1186/s13104-021-05644-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 06/02/2021] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE In order to isolate and identify bacteria that produce potentially novel bactericidal/bacteriostatic compounds, two ponds on the campus of the Rochester Institute of Technology (RIT) were targeted as part of a bioprospecting effort. RESULTS One of the unique isolates, RIT 452 was identified as Exiguobacterium sp. and subjected to whole-genome sequencing. The genome was assembled and in silico analysis was performed to predict the secondary metabolite gene clusters, which suggested the potential of Exiguobacterium RIT452 for producing antibiotic compounds. Extracts of spent growth media of RIT452 were active in disc diffusion assays performed against four reference strains, two Gram-negative (E. coli ATCC 25922 and P. aeruginosa ATCC 27853) and two Gram-positive (B. subtilis BGSC 168 and S. aureus ATCC 25923). Differential extraction and liquid chromatography was used to fractionate the extracts. Efforts to identify and elucidate the structure of the active compound(s) are still ongoing.
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Affiliation(s)
- Nicole T. Cavanaugh
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, 85 Lomb Memorial Drive, Rochester, NY 14623 USA
| | - Anutthaman Parthasarathy
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, 85 Lomb Memorial Drive, Rochester, NY 14623 USA
| | - Narayan H. Wong
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, 85 Lomb Memorial Drive, Rochester, NY 14623 USA
| | - KayLee K. Steiner
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, 85 Lomb Memorial Drive, Rochester, NY 14623 USA
| | - Jonathan Chu
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, 85 Lomb Memorial Drive, Rochester, NY 14623 USA
| | - Joseph Adjei
- National Technical Institute for the Deaf, Rochester Institute of Technology, 52 Lomb Memorial Drive, Rochester, NY 14623 USA
| | - André O. Hudson
- Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology, 85 Lomb Memorial Drive, Rochester, NY 14623 USA
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