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Wu R, Payne M, Zhang L, Lan R. Uncovering the boundaries of Campylobacter species through large-scale phylogenetic and nucleotide identity analyses. mSystems 2024; 9:e0121823. [PMID: 38530055 PMCID: PMC11019964 DOI: 10.1128/msystems.01218-23] [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: 11/14/2023] [Accepted: 02/21/2024] [Indexed: 03/27/2024] Open
Abstract
Campylobacter species are typically helical shaped, Gram-negative, and non-spore-forming bacteria. Species in this genus include established foodborne and animal pathogens as well as emerging pathogens. The accumulation of genomic data from the Campylobacter genus has increased exponentially in recent years, accompanied by the discovery of putative new species. At present, the lack of a standardized species boundary complicates distinguishing established and novel species. We defined the Campylobacter genus core genome (500 loci) using publicly available Campylobacter complete genomes (n = 498) and constructed a core genome phylogeny using 2,193 publicly available Campylobacter genomes to examine inter-species diversity and species boundaries. Utilizing 8,440 Campylobacter genomes representing 33 species and 8 subspecies, we found species delineation based on an average nucleotide identity (ANI) cutoff of 94.2% is consistent with the core genome phylogeny. We identified 60 ANI genomic species that delineated Campylobacter species in concordance with previous comparative genetic studies. All pairwise ANI genomic species pairs had in silico DNA-DNA hybridization scores of less than 70%, supporting their delineation as separate species. We provide the tool Campylobacter Genomic Species typer (CampyGStyper) that assigns ANI genomic species to query genomes based on ANI similarities to medoid genomes from each ANI genomic species with an accuracy of 99.96%. The ANI genomic species definitions proposed here allow consistent species definition in the Campylobacter genus and will facilitate the detection of novel species in the future.IMPORTANCEIn recent years, Campylobacter has gained recognition as the leading cause of bacterial gastroenteritis worldwide, leading to a substantial rise in the collection of genomic data of the Campylobacter genus in public databases. Currently, a standardized Campylobacter species boundary at the genomic level is absent, leading to challenges in detecting emerging pathogens and defining putative novel species within this genus. We used a comprehensive representation of genomes of the Campylobacter genus to construct a core genome phylogenetic tree. Furthermore, we found an average nucleotide identity (ANI) of 94.2% as the optimal cutoff to define the Campylobacter species. Using this cutoff, we identified 60 ANI genomic species which provided a standardized species definition and nomenclature. Importantly, we have developed Campylobacter Genomic Species typer (CampyGStyper), which can robustly and accurately assign these ANI genomic species to Campylobacter genomes, thereby aiding pathogen surveillance and facilitating evolutionary and epidemiological studies of existing and emerging pathogens in the genus Campylobacter.
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Affiliation(s)
- Ruochen Wu
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales, Australia
| | - Michael Payne
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales, Australia
| | - Li Zhang
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales, Australia
| | - Ruiting Lan
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, New South Wales, Australia
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Harlow K, Summers KL, Oliver WT, Wells JE, Crouse M, Neville BW, Rempel LA, Rivera I, Ramsay TG, Davies CP. Weaning transition, but not the administration of probiotic candidate Kazachstania slooffiae, shaped the gastrointestinal bacterial and fungal communities in nursery piglets. Front Vet Sci 2024; 10:1303984. [PMID: 38274656 PMCID: PMC10808496 DOI: 10.3389/fvets.2023.1303984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 12/20/2023] [Indexed: 01/27/2024] Open
Abstract
As in-feed antibiotics are phased out of swine production, producers are seeking alternatives to facilitate improvements in growth typically seen from this previously common feed additive. Kazachstania slooffiae is a prominent commensal fungus in the swine gut that peaks in relative abundance shortly after weaning and has beneficial interactions with other bacteriome members important for piglet health. In this study, piglets were supplemented with K. slooffiae to characterize responses in piglet health as well as fungal and bacterial components of the microbiome both spatially (along the entire gastrointestinal tract and feces) and temporally (before, during, and after weaning). Litters were assigned to one of four treatments: no K. slooffiae (CONT); one dose of K. slooffiae 7 days before weaning (day 14; PRE); one dose of K. slooffiae at weaning (day 21; POST); or one dose of K. slooffiae 7 days before weaning and one dose at weaning (PREPOST). The bacteriome and mycobiome were analyzed from fecal samples collected from all piglets at day 14, day 21, and day 49, and from organ samples along the gastrointestinal (GI) tract at day 21 and day 49. Blood samples were taken at day 14 and day 49 for cytokine analysis, and fecal samples were assayed for antimicrobial resistance. While some regional shifts were seen in response to K. slooffiae administration in the mycobiome of the GI tract, no remarkable changes in weight gain or health of the animals were observed, and changes were more likely due to sow and the environment. Ultimately, the combined microbiome changed most considerably following the transition from suckling to nursery diets. This work describes the mycobiome along the piglet GI tract through the weaning transition for the first time. Based on these findings, K. slooffiae administered at this concentration may not be an effective tool to hasten colonization of K. slooffiae in the piglet GI tract around the weaning transition nor support piglet growth, microbial gut health, or immunity. However, diet and environment greatly influence microbial community development.
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Affiliation(s)
- KaLynn Harlow
- Oak Ridge Institute for Science and Education, Agricultural Research Service Participation Program, Oak Ridge, TN, United States
- Animal Biosciences and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD, United States
| | - Katie Lynn Summers
- Animal Biosciences and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD, United States
| | - William T. Oliver
- Meat Animal Research Center, Agricultural Research Service, United States Department of Agriculture, Clay Center, NE, United States
| | - James E. Wells
- Meat Animal Research Center, Agricultural Research Service, United States Department of Agriculture, Clay Center, NE, United States
| | - Matthew Crouse
- Meat Animal Research Center, Agricultural Research Service, United States Department of Agriculture, Clay Center, NE, United States
| | - Bryan W. Neville
- Meat Animal Research Center, Agricultural Research Service, United States Department of Agriculture, Clay Center, NE, United States
| | - Lea A. Rempel
- Meat Animal Research Center, Agricultural Research Service, United States Department of Agriculture, Clay Center, NE, United States
| | - Israel Rivera
- Animal Biosciences and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD, United States
| | - Timothy G. Ramsay
- Animal Biosciences and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD, United States
| | - Cary Pirone Davies
- Animal Biosciences and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD, United States
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Cribb DM, Moffatt CRM, Wallace RL, McLure AT, Bulach D, Jennison AV, French N, Valcanis M, Glass K, Kirk MD. Genomic and clinical characteristics of campylobacteriosis in Australia. Microb Genom 2024; 10:001174. [PMID: 38214338 PMCID: PMC10868609 DOI: 10.1099/mgen.0.001174] [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: 10/31/2023] [Accepted: 12/18/2023] [Indexed: 01/13/2024] Open
Abstract
Campylobacter spp. are a common cause of bacterial gastroenteritis in Australia, primarily acquired from contaminated meat. We investigated the relationship between genomic virulence characteristics and the severity of campylobacteriosis, hospitalisation, and other host factors.We recruited 571 campylobacteriosis cases from three Australian states and territories (2018-2019). We collected demographic, health status, risk factors, and self-reported disease data. We whole genome sequenced 422 C. jejuni and 84 C. coli case isolates along with 616 retail meat isolates. We classified case illness severity using a modified Vesikari scoring system, performed phylogenomic analysis, and explored risk factors for hospitalisation and illness severity.On average, cases experienced a 7.5 day diarrhoeal illness with additional symptoms including stomach cramps (87.1 %), fever (75.6 %), and nausea (72.0 %). Cases aged ≥75 years had milder symptoms, lower Vesikari scores, and higher odds of hospitalisation compared to younger cases. Chronic gastrointestinal illnesses also increased odds of hospitalisation. We observed significant diversity among isolates, with 65 C. jejuni and 21 C. coli sequence types. Antimicrobial resistance genes were detected in 20.4 % of isolates, but multidrug resistance was rare (0.04 %). Key virulence genes such as cdtABC (C. jejuni) and cadF were prevalent (>90 % presence) but did not correlate with disease severity or hospitalisation. However, certain genes (e.g. fliK, Cj1136, and Cj1138) appeared to distinguish human C. jejuni cases from food source isolates.Campylobacteriosis generally presents similarly across cases, though some are more severe. Genotypic virulence factors identified in the literature to-date do not predict disease severity but may differentiate human C. jejuni cases from food source isolates. Host factors like age and comorbidities have a greater influence on health outcomes than virulence factors.
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Affiliation(s)
- Danielle M. Cribb
- National Centre for Epidemiology and Population Health, the Australian National University, Canberra, Australia
| | - Cameron R. M. Moffatt
- Queensland Health Forensic and Scientific Services, Coopers Plains, Brisbane, Australia
| | - Rhiannon L. Wallace
- Agriculture and Agri-Food Canada, Agassiz Research and Development Centre, Agassiz, British Columbia, Canada
| | - Angus T. McLure
- National Centre for Epidemiology and Population Health, the Australian National University, Canberra, Australia
| | - Dieter Bulach
- Melbourne Bioinformatics, The University of Melbourne, Melbourne, Australia
- Microbiological Diagnostic Unit Public Health Laboratory, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Australia
| | - Amy V. Jennison
- Queensland Health Forensic and Scientific Services, Coopers Plains, Brisbane, Australia
| | - Nigel French
- Tāwharau Ora|School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - Mary Valcanis
- Microbiological Diagnostic Unit Public Health Laboratory, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Australia
| | - Kathryn Glass
- National Centre for Epidemiology and Population Health, the Australian National University, Canberra, Australia
| | - Martyn D. Kirk
- National Centre for Epidemiology and Population Health, the Australian National University, Canberra, Australia
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Ahmadi Z, Pakbin B, Kazemi M, Rahimi Z, Mahmoudi R. Genotyping and antibiotic susceptibility of Campylobacter species isolated from raw milk samples in Qazvin, Iran. BMC Res Notes 2023; 16:314. [PMID: 37932835 PMCID: PMC10626807 DOI: 10.1186/s13104-023-06576-9] [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: 06/23/2023] [Accepted: 10/16/2023] [Indexed: 11/08/2023] Open
Abstract
OBJECTIVE Campylobacter species are major causes of foodborne illnesses, with unpasteurized milk being a significant carrier of these bacteria, posing a public health risk. One of the challenges in managing Campylobacter infections is the emergence and spread of antibiotic resistance. We conducted a study in Qazvin, Iran, testing 84 raw cow's milk samples to determine the frequency of C. jejuni and C. coli using culture-based and multiplex PCR methods. Additionally, the disk diffusion and RAPD-PCR approaches were utilized to evaluate the phenotypic antibiotic resistance profile and genetic diversity of Campylobacter strains. RESULTS The findings indicated that Campylobacter spp. was present in 19.05% of the samples, with C. coli being the predominant isolate. We tested eight antibiotic agents, and the resistance levels of the isolates were as follows: erythromycin 100%, tetracycline 75%, doxycycline 56.25%, ceftriaxone 43.75%, chloramphenicol 37.5%, amoxicillin-clavulanic acid 25%, nalidixic acid 12.5%, and azithromycin 6.25%. Genetic diversity analysis categorized Campylobacter isolates into 39 clusters, indicating a wide diversity among strains. However, no significant correlation was observed between antibiotic resistance and cluster patterns. These findings underscore the role of raw milk as a reservoir for Campylobacter spp. and highlight the substantial antibiotic resistance and genetic diversity within the species population.
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Affiliation(s)
- Zohreh Ahmadi
- Department of Food Safety and Health, School of Public Health, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Babak Pakbin
- Werner Siemens Chair of Synthetic Biotechnology, Dept. of Chemistry, Technical University of Munich (TUM), Lichtenberg Str. 4, 85748, Garching bei München, Germany
| | - Maryam Kazemi
- Department of Food Safety and Health, School of Public Health, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Zahra Rahimi
- Department of Food Safety and Health, School of Public Health, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Razzagh Mahmoudi
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
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Teksoy N, Ilktac M, Ongen B. Investigating the Significance of Non- jejuni/ coli Campylobacter Strains in Patients with Diarrhea. Healthcare (Basel) 2023; 11:2562. [PMID: 37761759 PMCID: PMC10530337 DOI: 10.3390/healthcare11182562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 09/13/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
Campylobacter is one of the most commonly reported foodborne bacteria worldwide. Although Campylobacter jejuni and Campylobacter coli have been reported to be responsible for the great majority of campylobacteriosis, the burden of infections by species other than C. jejuni and C. coli have been increasing as a result of a transition to diagnostic test methods that enable the isolation of emerging species. The aim of the present study was to recover C. jejuni, C. coli, and emerging species from the stool samples of 500 patients with gastroenteritis and 100 healthy subjects via the use of a filtration method and culture techniques using Butzler agar and mCCDA under a microaerobic or hydrogen-enriched atmosphere, identify the species by multiplex PCR methods and assess the significance of emerging species in enteric diseases. Thirty-one (6.2%) Campylobacter spp. were isolated from the stool samples of diarrheic patients but none from healthy individuals. Of 31 isolates, 21 (67.8%), nine (29%), and one (3.2%) were identified as C. jejuni, C. coli, and Campylobacter concisus by multiplex PCR, respectively. The filtration method was superior to the culture technique using mCCDA under a microaerobic atmosphere. C. concisus was evaluated as the etiology of gastroenteritis as a result of laboratory and clinical evaluations. The present study was the first to indicate that emerging Campylobacter species are rarely detected and C. concisus is linked to acute gastroenteritis in Turkey where additional studies are warranted to clarify the significance of emerging species in gastroenteritis.
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Affiliation(s)
- Nermin Teksoy
- Medical Microbiology Department, Istanbul Faculty of Medicine, Istanbul University, 34093 Istanbul, Turkey; (N.T.); (B.O.)
| | - Mehmet Ilktac
- Faculty of Pharmacy, Eastern Mediterranean University, via Mersin 10 Turkey, Famagusta 99628, Cyprus
| | - Betigul Ongen
- Medical Microbiology Department, Istanbul Faculty of Medicine, Istanbul University, 34093 Istanbul, Turkey; (N.T.); (B.O.)
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Dias-Alves A, Espunyes J, Ayats T, Sente C, Sebulime P, Muro J, Tushabe J, Asiimwe C, Fernandez Aguilar X, Aruho R, Marco I, Planellas M, Cardells J, Cabezón O, Cerdà-Cuéllar M. Foodborne Pathogens at the Livestock-Wildlife-Human Interface in Rural Western Uganda. ECOHEALTH 2023; 20:144-149. [PMID: 37261595 DOI: 10.1007/s10393-023-01639-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 03/15/2023] [Indexed: 06/02/2023]
Abstract
Foodborne pathogens are an important cause of morbidity and mortality worldwide. To assess the presence of Salmonella, Campylobacter and Arcobacter spp. in livestock, wildlife, and humans from different regions across western Uganda, 479 faecal samples were tested by PCR. Salmonella and Campylobacter spp. were more frequently detected in livestock (5.1% and 23.5%, respectively) compared to wildlife (1.9% and 16.8%, respectively). Wildlife from remote areas showed lower Salmonella and Campylobacter spp. occurrence than in areas where interactions with livestock are common, suggesting that spill-over may exist from livestock or humans. Further studies are needed to better understand the transmission dynamics of these pathogens at the wildlife-livestock-human interface in western Uganda.
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Affiliation(s)
- Andrea Dias-Alves
- Wildlife Conservation Medicine Research Group (WildCoM), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain.
| | - Johan Espunyes
- Wildlife Conservation Medicine Research Group (WildCoM), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
- Research and Conservation Department, Zoo de Barcelona, Parc de la Ciutadella s/n, 08003, Barcelona, Spain
| | - Teresa Ayats
- Unitat mixta d'Investigació IRTA-UAB en Sanitat Animal, Centre de Recerca en Sanitat Animal (CReSA), Campus de la Universitat Autònoma de Barcelona (UAB), Bellaterra, Catalonia, Spain
- IRTA, Programa de Sanitat Animal, Centre de Recerca en Sanitat Animal (CReSA), Campus de la Universitat Autònoma de Barcelona (UAB), Bellaterra, Catalonia, Spain
| | - Celsus Sente
- Department of Wildlife and Aquatic Animal Resources (WAAR), School of Veterinary Medicine and Animal Resources (SVAR), College of Veterinary Medicine, Animal Resources and Bio-Security (COVAB), Makerere University, P.O. Box 7062, Kampala, Uganda
| | - Peregrine Sebulime
- Department of Wildlife and Aquatic Animal Resources (WAAR), School of Veterinary Medicine and Animal Resources (SVAR), College of Veterinary Medicine, Animal Resources and Bio-Security (COVAB), Makerere University, P.O. Box 7062, Kampala, Uganda
| | - Jesus Muro
- Daktari, Urb. La Solana 35, AD700, Escaldes, Andorra
| | | | | | - Xavier Fernandez Aguilar
- Wildlife Conservation Medicine Research Group (WildCoM), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Robert Aruho
- Uganda Wildlife Authority (UWA), P.O. Box 3530, Kampala, Uganda
| | - Ignasi Marco
- Wildlife Conservation Medicine Research Group (WildCoM), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Marta Planellas
- Hospital Clínic Veterinari, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Jesús Cardells
- Servicio de Análisis, Investigación, Gestión de Animales Silvestres (SAIGAS), Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, 46115, Alfara del Patriarca, Valencia, Spain
| | - Oscar Cabezón
- Wildlife Conservation Medicine Research Group (WildCoM), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Marta Cerdà-Cuéllar
- Unitat mixta d'Investigació IRTA-UAB en Sanitat Animal, Centre de Recerca en Sanitat Animal (CReSA), Campus de la Universitat Autònoma de Barcelona (UAB), Bellaterra, Catalonia, Spain
- IRTA, Programa de Sanitat Animal, Centre de Recerca en Sanitat Animal (CReSA), Campus de la Universitat Autònoma de Barcelona (UAB), Bellaterra, Catalonia, Spain
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Khemnu N, Serichantalergs O, Ruekit S, Lertsethtakarn P, Poly F, Swierczewski BE, Crawford JM. Description of novel capsule biosynthesis loci of Campylobacter jejuni clinical isolates from South and South-East Asia. PLoS One 2023; 18:e0280583. [PMID: 36662748 PMCID: PMC9858101 DOI: 10.1371/journal.pone.0280583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 01/04/2023] [Indexed: 01/21/2023] Open
Abstract
Campylobacter jejuni is a major cause of bacterial diarrhea worldwide and associated with numerous sequela, including Guillain-Barré Syndrome, inflammatory bowel disease, reactive arthritis, and irritable bowel syndrome. C. jejuni is unusual for an intestinal pathogen in its ability to coat its surface with a polysaccharide capsule (CPS). The genes responsible for the biosynthesis of the phase variable CPS is located in the hypervariable region of C. jejuni genome which has been used to develop multiplex PCR to classify CPS types based on the Penner serotypes. However, there still are non-typable CPS C. jejuni by the current multiplex PCR scheme. The application of the next generation sequencing and whole genome analysis software were used for the identification of novel capsule biosynthesis of C. jejuni isolates. Unique PCR primers were designed to identify these new capsule biosynthesis loci. The designed primers sets were combined in a new multiplex mix called epsilon. The unique sequences provide an additional information of the biosynthesis loci responsible for some of the common CPS sugars/residues such as heptose, deoxtyheptose and MeOPN among C. jejuni in this new group of CPS multiplex assay. This new primer complements the current C. jejuni multiplex capsule typing system and will help in identifying previously untypeable capsule locus of C. jejuni isolates.
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Affiliation(s)
- Nuanpan Khemnu
- Department of Bacteria and Parasitic Diseases, Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok, Thailand
| | - Oralak Serichantalergs
- Department of Bacteria and Parasitic Diseases, Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok, Thailand
| | - Sirigade Ruekit
- Department of Bacteria and Parasitic Diseases, Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok, Thailand
| | - Paphavee Lertsethtakarn
- Department of Bacteria and Parasitic Diseases, Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok, Thailand
| | - Frédéric Poly
- Enteric Diseases Department, Naval Medical Research Center, San Diego, MD, United States of America
| | - Brett E. Swierczewski
- Department of Bacteria and Parasitic Diseases, Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok, Thailand
| | - John M. Crawford
- Department of Bacteria and Parasitic Diseases, Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok, Thailand
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Kelly GC, Rachmat A, Hontz RD, Sklar MJ, Tran LK, Supaprom C, Luy M, Lina S, Gregory MJ, Sopheab H, Brooks JS, Sutherland IW, Corson KS, Letizia AG. Etiology and risk factors for diarrheal disease amongst rural and peri-urban populations in Cambodia, 2012-2018. PLoS One 2023; 18:e0283871. [PMID: 37000848 PMCID: PMC10065300 DOI: 10.1371/journal.pone.0283871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 03/19/2023] [Indexed: 04/03/2023] Open
Abstract
Diarrheal diseases are a leading cause of mortality and morbidity, disproportionally affecting persons residing in low and middle-income countries. Accessing high-resolution surveillance data to understand community-level etiology and risk remains challenging, particularly in remote and resource limited populations. A multi-year prospective cohort study was conducted in two rural and two peri-urban villages in Cambodia from 2012 to 2018 to describe the epidemiology and etiology of acute diarrheal diseases within the population. Suspected diarrheal episodes among participants were self-reported or detected via routine weekly household visits. Fresh stool and fecal swabs were tested, and acute-illness and follow-up participant questionnaires collected. Of 5027 enrolled participants, 1450 (28.8%) reported at least one diarrheal incident. A total of 4266 individual diarrhea case events were recorded. Diarrhea incidence rate was calculated to be 281.5 persons per 1000 population per year, with an event rate of 664.3 individual diarrhea events occurring per 1000 population per year. Pathogenic Escherichia coli, Aeromonas spp., and Plesiomonas shigelloides were the most prevalent bacterial infections identified. Hookworm and Strongyloides stercoralis were the predominant helminth species, while Blastocystis hominis and Giardia lamblia were the predominant protozoan species found. Norovirus genotype 2 was the predominant virus identified. Mixed infections of two or more pathogens were detected in 36.2% of positive cases. Risk analyses identified unemployed status increased diarrhea risk by 63% (HR = 1.63 [95% CI 1.46, 1.83]). Individuals without access to protected water sources or sanitation facilities were 59% (HR = 1.59 [95% CI 1.49, 1.69]) and 19% (HR = 1.19 [95% CI 1.12, 1.28]) greater risk of contracting diarrhea, respectively. Patient-level surveillance data captured in this long-term study has generated a unique spatiotemporal profile of diarrheal disease in Cambodia. Understanding etiologies, together with associated epidemiological and community-level risk, provides valuable public health insight to support effective planning and delivery of appropriate local population-targeted interventions.
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Affiliation(s)
- Gerard C. Kelly
- Vysnova Partners, Inc., Landover, Maryland, United States of America
- * E-mail:
| | - Agus Rachmat
- AC Investment Co, Contractor for NAMRU-2 Phnom Penh, Phnom Penh, Cambodia
| | | | | | - Long Khanh Tran
- Vysnova Partners, Inc., Landover, Maryland, United States of America
| | - Chonthida Supaprom
- AC Investment Co, Contractor for NAMRU-2 Phnom Penh, Phnom Penh, Cambodia
| | - Malen Luy
- AC Investment Co, Contractor for NAMRU-2 Phnom Penh, Phnom Penh, Cambodia
| | - Sin Lina
- AC Investment Co, Contractor for NAMRU-2 Phnom Penh, Phnom Penh, Cambodia
| | | | - Heng Sopheab
- National Institute of Public Health, Ministry of Health, Cambodia
| | - John S. Brooks
- U.S. Naval Medical Research Unit TWO, Phnom Penh, Cambodia
| | | | - Karen S. Corson
- U.S. Naval Medical Research Unit TWO, Singapore, Singapore
- U.S. Naval Medical Research Unit TWO, Phnom Penh, Cambodia
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Lanzl M, Zwietering M, Abee T, den Besten H. Combining enrichment with multiplex real-time PCR leads to faster detection and identification of Campylobacter spp. in food compared to ISO 10272–1:2017. Food Microbiol 2022; 108:104117. [DOI: 10.1016/j.fm.2022.104117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 07/26/2022] [Accepted: 08/14/2022] [Indexed: 11/16/2022]
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10
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Teixeira JS, Boras VF, Hetman BM, Taboada EN, Inglis GD. Molecular Epidemiological Evidence Implicates Cattle as a Primary Reservoir of Campylobacter jejuni Infecting People via Contaminated Chickens. Pathogens 2022; 11:1366. [PMID: 36422616 PMCID: PMC9698452 DOI: 10.3390/pathogens11111366] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/07/2022] [Accepted: 11/08/2022] [Indexed: 09/10/2024] Open
Abstract
The study aimed to determine the relative contribution of cattle to the burden of illness in a model agroecosystem with high rates of human campylobacteriosis (≥ 115 cases/100 K), and high densities of cattle, including large numbers of cattle housed in confined feeding operations (i.e., in southwestern Alberta, Canada). To accomplish this, a large-scale molecular epidemiological analysis of Campylobacter jejuni circulating within the study location was completed. In excess of 8000 isolates of C. jejuni from people (n = 2548 isolates), chickens (n = 1849 isolates), cattle (n = 2921 isolates), and water (n = 771 isolates) were subtyped. In contrast to previous studies, the source attribution estimates of clinical cases attributable to cattle vastly exceeded those attributed to chicken (i.e., three- to six-fold). Moreover, cattle were often colonized by C. jejuni (51%) and shed the bacterium in their feces. A large proportion of study isolates were found in subtypes primarily associated with cattle (46%), including subtypes infecting people and those associated with chickens (19%). The implication of cattle as a primary amplifying reservoir of C. jejuni subtypes in circulation in the study location is supported by the strong cattle association with subtypes that were found in chickens and in people, a lack of evidence indicating the foodborne transmission of C. jejuni from beef and dairy, and the large number of cattle and the substantial quantities of untreated manure containing C. jejuni cells. Importantly, the evidence implicated cattle as a source of C. jejuni infecting people through a transmission pathway from cattle to people via the consumption of chicken. This has implications for reducing the burden of campylobacteriosis in the study location and elsewhere.
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Affiliation(s)
- Januana S. Teixeira
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada
| | - Valerie F. Boras
- Chinook Regional Hospital, Alberta Health Services, Lethbridge, AB T1J 1W5, Canada
| | - Benjamin M. Hetman
- Office of Public Health Field Services and Training, Public Health Agency of Canada, Winnipeg, MB R3C 0P4, Canada
| | - Eduardo N. Taboada
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB R3E 3R2, Canada
| | - G. Douglas Inglis
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada
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11
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Espunyes J, Illera L, Dias-Alves A, Lobato L, Ribas MP, Manzanares A, Ayats T, Marco I, Cerdà-Cuéllar M. Eurasian griffon vultures carry widespread antimicrobial resistant Salmonella and Campylobacter of public health concern. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 844:157189. [PMID: 35803423 DOI: 10.1016/j.scitotenv.2022.157189] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 06/30/2022] [Accepted: 07/02/2022] [Indexed: 06/15/2023]
Abstract
The global emergence of antimicrobial-resistant (AMR) strains of Salmonella and Campylobacter is a serious public health concern. Both bacteria are leading causes of human gastrointestinal foodborne infections and the two most reported zoonoses in the European Union. By feeding on livestock carcasses, especially from intensive farming, as well as on landfill sites, obligate avian scavengers can become infected with zoonotic pathogens and AMR strains, and can be considered large-scale sentinels of the environmental burden. In this study, we assessed the occurrence and AMR of Salmonella spp. and Campylobacter spp. in 218 Eurasian griffon vultures (Gyps fulvus) captured in north-eastern Spain. We isolated Salmonella from 8.1 % of individuals and Campylobacter lari from 4.7 %. Among the 10 different Salmonella serovars found, monophasic S. Typhimurium was the most frequent. Genotyping analysis revealed same strains of monophasic S. Typhimurium shared by gulls, livestock and humans. Isolates from both bacterial species presented AMR to important antimicrobials (tetracyclines, fluoroquinolones and β-lactams). In conclusion, this study shows that Eurasian griffon vultures in north-eastern Spain are carriers of widespread AMR zoonotic Salmonella and Campylobacter. More comprehensive analyses are still needed to understand the potential risk of spill-over from those wild birds to humans.
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Affiliation(s)
- Johan Espunyes
- Wildlife Conservation Medicine Research Group (WildCoM), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
| | - Lucía Illera
- Wildlife Conservation Medicine Research Group (WildCoM), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Andrea Dias-Alves
- Wildlife Conservation Medicine Research Group (WildCoM), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Lourdes Lobato
- Wildlife Conservation Medicine Research Group (WildCoM), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Maria Puig Ribas
- Wildlife Conservation Medicine Research Group (WildCoM), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Alicia Manzanares
- Unitat mixta d'Investigació IRTA-UAB en Sanitat Animal, Centre de Recerca en Sanitat Animal (CReSA), Campus de la Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Spain
| | - Teresa Ayats
- Unitat mixta d'Investigació IRTA-UAB en Sanitat Animal, Centre de Recerca en Sanitat Animal (CReSA), Campus de la Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Spain
| | - Ignasi Marco
- Wildlife Conservation Medicine Research Group (WildCoM), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Marta Cerdà-Cuéllar
- Unitat mixta d'Investigació IRTA-UAB en Sanitat Animal, Centre de Recerca en Sanitat Animal (CReSA), Campus de la Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Spain; IRTA, Programa de Sanitat Animal, Centre de Recerca en Sanitat Animal (CReSA), Campus de la Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Spain
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12
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Urdaneta S, Lorca-Oró C, Dolz R, López-Soria S, Cerdà-Cuéllar M. In a warm climate, ventilation, indoor temperature and outdoor relative humidity have significant effects on Campylobacter spp. colonization in chicken broiler farms which can occur in only 2 days. Food Microbiol 2022; 109:104118. [DOI: 10.1016/j.fm.2022.104118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 08/13/2022] [Accepted: 08/15/2022] [Indexed: 10/15/2022]
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13
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Murawska M, Sypecka M, Bartosik J, Kwiecień E, Rzewuska M, Sałamaszyńska-Guz A. Should We Consider Them as a Threat? Antimicrobial Resistance, Virulence Potential and Genetic Diversity of Campylobacter spp. Isolated from Varsovian Dogs. Antibiotics (Basel) 2022; 11:antibiotics11070964. [PMID: 35884218 PMCID: PMC9311969 DOI: 10.3390/antibiotics11070964] [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] [Received: 06/29/2022] [Revised: 07/14/2022] [Accepted: 07/15/2022] [Indexed: 12/10/2022] Open
Abstract
Campylobacteriosis seems to be a growing problem worldwide. Apart from the most common sources of numerous Campylobacter species, such as poultry and other farm animals, dogs may be an underrated reservoir of this pathogen. Our goal was to establish the frequency of occurrence, antimicrobial resistance, and detection of chosen virulence factor genes in genomes of canine Campylobacter isolates. Campylobacter isolates frequency in dogs from shelters, and private origin was 13%. All of the tested virulence factor genes were found in 28 of 31 isolates. We determined high resistance levels to the ciprofloxacin and ampicillin and moderate tetracycline resistance. For C. jejuni shelter isolates, genetic diversity was also determined using PFGE. Our results indicate that dogs may be the reservoir of potentially diverse, potentially virulent, and antimicrobial-resistant Campylobacter strains.
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Affiliation(s)
- Małgorzata Murawska
- Division of Microbiology, Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786 Warsaw, Poland; (E.K.); (M.R.)
- Correspondence: (M.M.); (A.S.-G.)
| | - Monika Sypecka
- Translational Platform for Regenerative Medicine, Mossakowski Medical Research Institute, Polish Academy of Sciences, Pawińskiego 5, 02-106 Warsaw, Poland;
| | - Justyna Bartosik
- Division of Parasitology and Invasive Diseases, Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786 Warsaw, Poland;
| | - Ewelina Kwiecień
- Division of Microbiology, Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786 Warsaw, Poland; (E.K.); (M.R.)
| | - Magdalena Rzewuska
- Division of Microbiology, Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786 Warsaw, Poland; (E.K.); (M.R.)
| | - Agnieszka Sałamaszyńska-Guz
- Division of Microbiology, Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786 Warsaw, Poland; (E.K.); (M.R.)
- Correspondence: (M.M.); (A.S.-G.)
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14
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Rangaraju V, Malla BA, Milton AAP, Madesh A, Madhukar KB, Kadwalia A, Vinodhkumar OR, Kumar MS, Dubal ZB. Occurrence, antimicrobial resistance and virulence properties of thermophilic Campylobacter coli originating from two different poultry settings. GENE REPORTS 2022. [DOI: 10.1016/j.genrep.2022.101618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Castillo-Contreras R, Marín M, López-Olvera JR, Ayats T, Fernandez Aguilar X, Lavín S, Mentaberre G, Cerdà-Cuéllar M. Zoonotic Campylobacter spp. and Salmonella spp. carried by wild boars in a metropolitan area: occurrence, antimicrobial susceptibility and public health relevance. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 822:153444. [PMID: 35092769 DOI: 10.1016/j.scitotenv.2022.153444] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 01/18/2022] [Accepted: 01/22/2022] [Indexed: 06/14/2023]
Abstract
Campylobacter spp. and Salmonella spp. are the most reported zoonotic agents in Europe. They can be transmitted from wildlife to humans, and wild boars (Sus scrofa) can harbour them. In the Metropolitan Area of Barcelona (MAB, NE Spain) wild boars are found in urbanized areas. To assess the potential public health risk of this increasing wild boar population, we collected stool samples from 130 wild boars from the MAB (June 2015 - February 2016), to determine the Campylobacter and Salmonella occurrence and the antimicrobial susceptibility of the isolates. We also investigated the genetic diversity and virulence potential of Campylobacter. Campylobacter prevalence in wild boars was 61%. Forty six percent of wild boars carried Campylobacter lanienae, 16% carried Campylobacter coli, and 1% carried Campylobacter hyointestinalis; 4% carried both C. lanienae and C. coli, and 1% carried both C. lanienae and C. hyointestinalis. This is the first report of C. hyointestinalis in wildlife in Spain. Using pulse-field gel electrophoresis and multilocus sequence typing, we observed a high genetic diversity of Campylobacter and identified new sequence types. Thirty-three percent of C. coli and 14% of C. lanienae isolates showed a high virulence potential. All of the Campylobacter isolates analysed were resistant to at least one antimicrobial agent. Multidrug resistance was only detected in C. coli (67%). Salmonella enterica subsp. enterica was detected in four wild boars (3%) and included a S. Enteritidis serovar (1/4 wild boars) and a multidrug-resistant (ASSuT) monophasic S. Typhimurium serovar (1/4 wild boars) which is associated with human infections and pig meat in Europe. The characteristics of some of the Campylobacter and Salmonella isolates recovered suggest an anthropogenic origin. Wild boars are a reservoir of Campylobacter and have the potential to spread antimicrobial resistant Campylobacter and Salmonella in urbanized areas in the MAB.
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Affiliation(s)
- Raquel Castillo-Contreras
- Wildlife Ecology and Health group (WE&H) and Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Marta Marín
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Jorge Ramón López-Olvera
- Wildlife Ecology and Health group (WE&H) and Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Teresa Ayats
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Xavier Fernandez Aguilar
- Wildlife Ecology and Health group (WE&H) and Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Santiago Lavín
- Wildlife Ecology and Health group (WE&H) and Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Gregorio Mentaberre
- Wildlife Ecology and Health group (WE&H) and Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain; Serra Húnter fellow; Wildlife Ecology & Health group (WE&H) and Departament de Ciència Animal, Escola Tècnica Superior d'Enginyeria Agrària (ETSEA), Universitat de Lleida (UdL), Av. Rovira Roure 191, E-25098 Lleida, Spain
| | - Marta Cerdà-Cuéllar
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain; OIE Collaborating Centre for the Research and Control of Emerging and Re-Emerging Swine Diseases in Europe (IRTA-CReSA), 08193, Bellaterra, Barcelona, Spain.
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16
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Suman Kumar M, Ramees TP, Dhanze H, Gupta S, Dubal ZB, Kumar A. Occurrence and antimicrobial resistance of Campylobacter isolates from broiler chicken and slaughter house environment in India. Anim Biotechnol 2021; 34:199-207. [PMID: 34352178 DOI: 10.1080/10495398.2021.1953514] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Campylobacteriosis is among the most frequently reported foodborne zoonoses. A total of 848 samples were screened for Campylobacter spp. and occurrence was found to be 8.7%, 2.3% and 1.65% in broiler cecum samples, chicken meat samples and slaughter house environment swabs, respectively. High level of antimicrobial resistance was found against tetracycline (64.1%), doxycycline (54.4%), ampicillin (46.6%), nalidixic acid (42.7%), kanamycin (35.9%), and ciprofloxacin (33.33%). Resistance to co-amoxiclav (19.4%) and erythromycin (21.4%) was less common. The MAR index of the isolates was in the range of 0.11-0.78. Multi-drug resistance was observed in 54.4% of the isolates, with 53.2% C. jejuni and 55.3% C. coli isolates found resistant against three or more classes of antimicrobials. Presence of mutations in gyrA and 23S rRNA genes was investigated, which revealed that all the fluoroquinolone resistant isolates possessed Thr-86-Ile point mutation, whereas only 68% of erythromycin resistant isolates had A2075G mutation. The tetO gene was present in 91.7% tetracycline resistant isolates and blaOXA-61 gene was detected in 97.9% of the ampicillin resistant isolates. The occurrence of antimicrobial resistant Campylobacter spp. in broiler chicken samples and slaughter house settings is a public health risk and calls for judicial use of antimicrobials.
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Affiliation(s)
- M Suman Kumar
- Division of Veterinary Public Health, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - T P Ramees
- Division of Veterinary Public Health, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - H Dhanze
- Division of Veterinary Public Health, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - S Gupta
- Division of Veterinary Public Health, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - Z B Dubal
- Division of Veterinary Public Health, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - A Kumar
- Indian Council of Agricultural Research, New Delhi, India
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17
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Inglis GD, Teixeira JS, Boras VF. Comparative prevalence and diversity of Campylobacter jejuni strains in water and human beings over a 1-year period in southwestern Alberta, Canada. Can J Microbiol 2021; 67:851-863. [PMID: 34233129 DOI: 10.1139/cjm-2021-0158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Campylobacter jejuni was isolated from diarrheic people, river water (Oldman River watershed), wastewater, and drinking water over a 1-year period in southwestern Alberta (2008-2009). High rates of campylobacteriosis were observed during the study period (≥115 cases/100K). Infections occurred throughout the year, with a peak in late summer and early autumn. The majority of infections occurred in people living in Lethbridge. Campylobacter jejuni was not isolated from municipal drinking water. In contrast, the bacterium was isolated from untreated and treated wastewater, and river water (all sites). There were no correlations between C. jejuni recovery/detection from water and river flow rates, water turbidity, or fecal coliforms. Campylobacter jejuni recovery from water did not correspond with the peak periods of campylobacteriosis. The bacterium was most commonly isolated downstream of wastewater outfalls; waterfowl congregated at these sites, particularly during the winter months. A comparison of subtypes from people and water revealed that the vast majority of subtypes in water did not correspond to subtypes recovered from diarrheic people, and were linked to waterfowl and other non-human animal sources. We conclude that water-borne C. jejuni did not contribute significantly to the high rates of campylobacteriosis observed in people during the study period.
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Affiliation(s)
- G Douglas Inglis
- Agriculture and Agri-Food Canada, 5403-1st Avenue S, Lethbridge, Alberta, Canada, T1J 4B1;
| | - Januana S Teixeira
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta, Canada;
| | - Valerie F Boras
- Chinook Regional Hospital, 89546, Department of Laboratory Medicine, Lethbridge, Alberta, Canada;
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18
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Valeris-Chacin R, Pieters M, Hwang H, Johnson TJ, Singer RS. Association of Broiler Litter Microbiome Composition and Campylobacter Isolation. Front Vet Sci 2021; 8:654927. [PMID: 34109233 PMCID: PMC8180553 DOI: 10.3389/fvets.2021.654927] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 04/19/2021] [Indexed: 12/31/2022] Open
Abstract
Infection with Campylobacter species is one of the leading causes of bacterial diarrhea in humans in the US. Chickens, which become colonized on the farm, are important reservoirs of this bacterium. Campylobacter can establish itself in the broiler house via a variety of sources, can survive in the litter of the house, and possibly persist over successive flock cycles. However, the role of the broiler litter microbiome on Campylobacter persistence is not clear. A matched case-control study was conducted to determine whether the broiler litter microbiome composition was associated with Campylobacter isolation within the broiler house. Flocks were classified as cases when either Campylobacter jejuni or Campylobacter coli was isolated in boot sock samples, or as controls otherwise. Case and control flocks were matched at the broiler house level. Composite broiler litter samples were collected and used for DNA extraction and 16S rRNA gene V4 region sequencing. Reads were processed using the DADA2 pipeline to obtain a table of amplicon sequence variants. Alpha diversity and differential bacterial relative abundance were used as predictors of Campylobacter isolation status in conditional logistic regression models adjusting for flock age and sampling season. Beta diversity distances were used as regressors in stratified PERMANOVA with Campylobacter isolation status as predictor, and broiler house as stratum. When Campylobacter was isolated in boot socks, broiler litter microbiome richness and evenness were lower and higher, respectively, without reaching statistical significance. Campylobacter isolation status significantly explained a small proportion of the beta diversity (genus-level Aitchison dissimilarity distance). Clostridium and Anaerostipes were positively associated with Campylobacter isolation status, whereas Bifidobacterium, Anaerosporobacter, and Stenotrophomonas were negatively associated. Our results suggest the presence of bacterial interactions between Campylobacter and the broiler litter microbiome. The negative association of Campylobacter with Bifidobacterium, Anaerosporobacter, and Stenotrophomonas in litter could be potentially exploited as a pre-harvest control strategy.
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Affiliation(s)
- Robert Valeris-Chacin
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN, United States
| | - Maria Pieters
- Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN, United States.,Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN, United States
| | - Haejin Hwang
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN, United States
| | - Timothy J Johnson
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN, United States
| | - Randall S Singer
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN, United States
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19
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Antimicrobial Resistance of Campylobacter spp. Causing Human Infection in Australia: An International Comparison. Microb Drug Resist 2021; 27:518-528. [DOI: 10.1089/mdr.2020.0082] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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20
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Ramos AP, Leonhard SE, Halstead SK, Cuba MA, Castañeda CC, Dioses JA, Tipismana MA, Abanto JT, Llanos A, Gourlay D, Grogl M, Ramos M, Rojas JD, Meza R, Puiu D, Sherman RM, Salzberg SL, Simner PJ, Willison HJ, Jacobs BC, Cornblath DR, Umeres HF, Pardo CA. Guillain-Barré Syndrome Outbreak in Peru 2019 Associated With Campylobacter jejuni Infection. NEUROLOGY(R) NEUROIMMUNOLOGY & NEUROINFLAMMATION 2021; 8:e952. [PMID: 33547152 PMCID: PMC8057064 DOI: 10.1212/nxi.0000000000000952] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 11/23/2020] [Indexed: 12/02/2022]
Abstract
OBJECTIVE To identify the clinical phenotypes and infectious triggers in the 2019 Peruvian Guillain-Barré syndrome (GBS) outbreak. METHODS We prospectively collected clinical and neurophysiologic data of patients with GBS admitted to a tertiary hospital in Lima, Peru, between May and August 2019. Molecular, immunologic, and microbiological methods were used to identify causative infectious agents. Sera from 41 controls were compared with cases for antibodies to Campylobacter jejuni and gangliosides. Genomic analysis was performed on 4 C jejuni isolates. RESULTS The 49 included patients had a median age of 44 years (interquartile range [IQR] 30-54 years), and 28 (57%) were male. Thirty-two (65%) had symptoms of a preceding infection: 24 (49%) diarrhea and 13 (27%) upper respiratory tract infection. The median time between infectious to neurologic symptoms was 3 days (IQR 2-9 days). Eighty percent had a pure motor form of GBS, 21 (43%) had the axonal electrophysiologic subtype, and 18% the demyelinating subtype. Evidence of recent C jejuni infection was found in 28/43 (65%). No evidence of recent arbovirus infection was found. Twenty-three cases vs 11 controls (OR 3.3, confidence interval [CI] 95% 1.2-9.2, p < 0.01) had IgM and/or IgA antibodies against C jejuni. Anti-GM1:phosphatidylserine and/or anti-GT1a:GM1 heteromeric complex antibodies were strongly positive in cases (92.9% sensitivity and 68.3% specificity). Genomic analysis showed that the C jejuni strains were closely related and had the Asn51 polymorphism at cstII gene. CONCLUSIONS Our study indicates that the 2019 Peruvian GBS outbreak was associated with C jejuni infection and that the C jejuni strains linked to GBS circulate widely in different parts of the world.
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Affiliation(s)
- Ana P. Ramos
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Sonja E. Leonhard
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Susan K. Halstead
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Mireya A. Cuba
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Carlos C. Castañeda
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Jose A. Dioses
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Martin A. Tipismana
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Jesus T. Abanto
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Alejandro Llanos
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Dawn Gourlay
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Max Grogl
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Mariana Ramos
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Jesus D. Rojas
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Rina Meza
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Daniela Puiu
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Rachel M. Sherman
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Steven L. Salzberg
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Patricia J. Simner
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Hugh J. Willison
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - Bart C. Jacobs
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
| | - David R. Cornblath
- From the Departamento de Medicina (A.P.R., M.A.C., C.C.C., J.A.D., M.A.T., J.T.A., H.F.U.), Servicio de Neurología y Neuropsiquiatría, Hospital Cayetano Heredia, Lima, Perú; Department of Neurology (S.E.L.) and Department of Neurology and Department of Immunology (B.C.J.), Erasmus MC, University Medical Center Rotterdam, Netherlands; Institute of Infection, Immunity and Inflammation (S.K.H., D.G., H.J.W.), University of Glasgow, United Kingdom; Departamento de Enfermedades Infecciosas Tropicales y Dermatológicas (A.L.), Hospital Cayetano Heredia, Lima, Perú; U.S. Naval Medical Research Unit-6 (M.G., M.R., J.D.R., R.M.), Lima, Peru; Center for Computational Biology (D.P., R.M.S., S.L.S.), Department of Computer Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD; and Department of Pathology (P.J.S.), Department of Neurology (D.R.C.), and Department of Neurology and Department of Pathology (C.A.P.), Johns Hopkins University School of Medicine, Baltimore, MD
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Espunyes J, Cabezón O, Dias-Alves A, Miralles P, Ayats T, Cerdà-Cuéllar M. Assessing the role of livestock and sympatric wild ruminants in spreading antimicrobial resistant Campylobacter and Salmonella in alpine ecosystems. BMC Vet Res 2021; 17:79. [PMID: 33588859 PMCID: PMC7885356 DOI: 10.1186/s12917-021-02784-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 02/02/2021] [Indexed: 11/10/2022] Open
Abstract
Background Livestock play an important role as reservoir of enteric pathogens and antimicrobial resistance (AMR), a health and economic concern worldwide. However, little is known regarding the transmission and maintenance of these pathogens at the wildlife-livestock interface. In this study, we assessed the occurrence, genetic diversity and AMR of Campylobacter spp. and Salmonella spp. shed by sympatric free-ranging livestock and a wild herbivore in an alpine ecosystem. Results Campylobacter spp. was isolated from 23.3 % of cattle and 7.7 % of sheep but was not isolated from horses nor Pyrenean chamois (Rupicapra pyrenaica). Campylobacter jejuni was the most frequent species. A high genetic diversity and certain host specificity of C. jejuni isolates was observed. The main AMR detected in Campylobacter isolates was to nalidixic acid (88.2 %), ciprofloxacin (82.4 %) and tetracycline (82.4 %); only 11.7 % of the isolates were pan-susceptible and 17.6 % were multi-resistant. Salmonella ser. Newport was isolated only from one Pyrenean chamois and was pan-susceptible. Conclusions Results show that free-ranging cattle and sheep are spreaders of Campylobacter as well as their AMR strains in the alpine environment. Therefore, contaminated alpine pastures or streams may constitute a source for the dissemination of AMR enteropathogens. However, apparently, alpine wild ungulates such as Pyrenean chamois play a negligible role in the epidemiology of zoonotic enteropathogens and AMR, and are not potential bioindicators of the burden of alpine environments.
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Affiliation(s)
- Johan Espunyes
- Wildlife Conservation Medicine Research Group (WildCoM), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, Bellaterra, Spain. .,Research and Conservation Department, Zoo de Barcelona, Barcelona, Spain.
| | - Oscar Cabezón
- Wildlife Conservation Medicine Research Group (WildCoM), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, Bellaterra, Spain.,UAB, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Andrea Dias-Alves
- Wildlife Conservation Medicine Research Group (WildCoM), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Pol Miralles
- UAB, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Teresa Ayats
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Marta Cerdà-Cuéllar
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
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Analysis of Campylobacter jejuni Subtype Distribution in the Chicken Broiler Production Continuum: a Longitudinal Examination To Identify Primary Contamination Points. Appl Environ Microbiol 2021; 87:AEM.02001-20. [PMID: 33158900 DOI: 10.1128/aem.02001-20] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 11/04/2020] [Indexed: 01/13/2023] Open
Abstract
Significant knowledge gaps exist in our understanding of Campylobacter jejuni contamination of the poultry production continuum. Microbiological surveillance and genotypic characterization were undertaken on C. jejuni isolates longitudinally recovered from three poultry farms (weekly samples), the abattoir at which birds were processed, and at retail over a 542-day period in southwestern Alberta, Canada, as a model location. Subtypes were compared to concurrent isolates from diarrheic humans living in the study region. Barn outbreaks in broiler chickens occurred infrequently. Subtypes from colonized birds, including clinically relevant subtypes of C. jejuni, were recovered within barns and from subsequent production stages. When C. jejuni was detected in barns, most birds rapidly became colonized by a limited number of subtypes late in the cycle. However, the diversity of subtypes recovered from birds in the abattoir increased substantially. Moreover, birds deemed free of C. jejuni upon exit from the barn became contaminated within the abattoir environment, and a high prevalence of meat at retail was contaminated with C. jejuni, including subtypes that had not been previously observed in the barns. The observed increase in prevalence of contamination and diversity of C. jejuni subtypes along the chicken production continuum indicates that birds from a relatively small number of barns contaminate transport trucks and the abattoir with C. jejuni strains, which are collectively transferred to poultry within the abattoir and conveyed to and persist on retail products. We conclude that the abattoir was the primary contamination point of poultry by C. jejuni but only a subset of subtypes were a high risk to human beings.IMPORTANCE The longitudinal examination of Campylobacter jejuni subtypes throughout the broiler production continuum is required to determine transmission mechanisms and to identify potential reservoirs and the foodborne risk posed. We showed that a limited number of C. jejuni subtypes are responsible for infrequent outbreaks in broilers within production barns and that colonized birds from a small number of farms are introduced into the abattoir where a high prevalence of carcasses are subsequently contaminated with a diversity of subtypes, which are transferred onto poultry in retail settings. However, only a subset of strains on poultry was determined to be clinically relevant. The study findings showed that resolving C. jejuni at the subtype level is important to ascertain health risks, and the knowledge obtained in the study provides information to mitigate clinically relevant subtypes to reduce the burden of campylobacteriosis.
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Abstract
Enteric viral and bacterial infections continue to be a leading cause of mortality and morbidity in young children in low-income and middle-income countries, the elderly, and immunocompromised individuals. Vaccines are considered an effective and practical preventive approach against the predominantly fecal-to-oral transmitted gastroenteritis particularly in the resource-limited countries or regions where implementation of sanitation systems and supply of safe drinking water are not quickly achievable. While vaccines are available for a few enteric pathogens including rotavirus and cholera, there are no vaccines licensed for many other enteric viral and bacterial pathogens. Challenges in enteric vaccine development include immunological heterogeneity among pathogen strains or isolates, a lack of animal challenge models to evaluate vaccine candidacy, undefined host immune correlates to protection, and a low protective efficacy among young children in endemic regions. In this article, we briefly updated the progress and challenges in vaccines and vaccine development for the leading enteric viral and bacterial pathogens including rotavirus, human calicivirus, Shigella, enterotoxigenic Escherichia coli (ETEC), cholera, nontyphoidal Salmonella, and Campylobacter, and introduced a novel epitope- and structure-based vaccinology platform known as MEFA (multiepitope fusion antigen) and the application of MEFA for developing broadly protective multivalent vaccines against heterogenous pathogens.
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Affiliation(s)
- Hyesuk Seo
- University of Illinois at Urbana-Champaign, Department of Pathobiology, Urbana, Illinois, USA
| | - Qiangde Duan
- University of Yangzhou, Institute of Comparative Medicine, Yangzhou, PR China
| | - Weiping Zhang
- University of Illinois at Urbana-Champaign, Department of Pathobiology, Urbana, Illinois, USA,CONTACT Weiping Zhang, University of Illinois at Urbana-Champaign, Department of Pathobiology, Urbana, Illinois, USA
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Gitahi N, Gathura PB, Gicheru MM, Wandia BM, Nordin A. Multidrug-resistant Campylobacter jejuni, Campylobacter coli and Campylobacter lari isolated from asymptomatic school-going children in Kibera slum, Kenya. F1000Res 2020; 9:92. [PMID: 37363437 PMCID: PMC10285328 DOI: 10.12688/f1000research.21299.2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/25/2020] [Indexed: 10/10/2023] Open
Abstract
Background: The objective of this study was to determine the prevalence of thermophilic Campylobacter spp. in asymptomatic school-going children and establish the antibiotic resistance patterns of the isolates towards the drugs used to treat campylobacteriosis, including macrolides, quinolones and tetracycline. Campylobacter spp. are a leading cause of enteric illness and have only recently shown resistance to antibiotics. Methods: This study isolated Campylobacter spp., including Campylobacter coli, Campylobacter jejuni and Campylobacter lari, in stool samples from asymptomatic school-going children in one of the biggest urban slums in Kenya. The disc diffusion method using EUCAST breakpoints was used to identify antibiotic-resistant isolates, which were further tested for genes encoding for tetracycline resistance using primer-specific polymerase chain reaction. Results: In total, 580 stool samples were collected from 11 primary schools considering both gender and age. Subjecting 294 biochemically characterized Campylobacter spp. isolates to genus-specific PCR, 106 (18.27% of stool samples) isolates were confirmed Campylobacter spp. Out of the 106 isolates, 28 (4.83%) were Campylobacter coli, 44 (7.58%) were Campylobacter jejuni while 11 (1.89%) were Campylobacter lari. Campylobacter jejuni had the highest number of isolates that were multi-drug resistant, with 26 out of the 28 tested isolates being resistant to ciprofloxacin (5 mg), nalidixic acid (30 mg), tetracycline (30 mg) and erythromycin (15 mg). Conclusions: In conclusion, asymptomatic school going children in the study area were found to be carriers of multidrug resistant Campylobacter coli, Campylobacter jejuni and Campylobacter lari at 84%. A one-health approach, which considers overlaps in environment, animals and human ecosystems, is recommended in addressing multidrug resistane in Campylobacter, since animals are the main reservoirs and environmental contamination is evident.
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Affiliation(s)
- Nduhiu Gitahi
- Department of Public Health, Pharmacology & Toxicology, University of Nairobi, Nairobi, 00100, Kenya
| | - Peter B. Gathura
- Department of Public Health, Pharmacology & Toxicology, University of Nairobi, Nairobi, 00100, Kenya
| | - Michael M. Gicheru
- Department of Zoological Sciences, Kenyatta University, Nairobi, 00100, Kenya
| | - Beautice M. Wandia
- Department of Public Health, Pharmacology & Toxicology, University of Nairobi, Nairobi, 00100, Kenya
| | - Annika Nordin
- Department of Energy and Technology, Swedish University of Agricultural Science, Uppsala, Sweden
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25
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Inglis GD, Taboada EN, Boras VF. Rates of fluoroquinolone resistance in domestically acquired Campylobacter jejuni are increasing in people living within a model study location in Canada. Can J Microbiol 2020; 67:37-52. [PMID: 32805182 DOI: 10.1139/cjm-2020-0146] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Antimicrobial resistance was evaluated in Campylobacter jejuni isolated from 1291 diarrheic people over a 15-year period (2004-2018) in southwestern Alberta, a model location in Canada with a high rate of campylobacteriosis. The prevalence of resistance to chloramphenicol, clindamycin, erythromycin, and gentamicin was low during the examination period (≤4.8%). Resistance to tetracycline remained consistently high (41.6%-65.1%), and resistance was primarily conferred by plasmid-borne tetO (96.2%). Resistance rates to ciprofloxacin and nalidixic acid increased substantially over the examination period, with a maximal fluoroquinolone resistance (FQR) prevalence of 28.9% in 2016. The majority of C. jejuni isolates resistant to ciprofloxacin (93.9%) contained a C257T single nucleotide polymorphism within the gyrA chromosomal gene. Follow up with infected people indicated that the observed increase in FQR was primarily due to domestically acquired infections. Moreover, the majority of FQ-resistant C. jejuni subtypes (82.6%) were endemic in Canada, primarily linked to cattle and chicken reservoirs; 18.4% of FQ-resistant isolates were assigned to three subtypes, predominantly associated with cattle. Study findings indicate the need to prioritize FQR monitoring in C. jejuni infections in Canada and to elucidate the dynamics of the emergence and transmission of resistant C. jejuni strains within and from cattle and chicken reservoirs.
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Affiliation(s)
- G Douglas Inglis
- Agriculture and Agri-Food Canada, 5403-1st Avenue South, Lethbridge, AB T1J 4B1, Canada
| | - Eduardo N Taboada
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB R3E 3M4, Canada
| | - Valerie F Boras
- Department of Laboratory Medicine, Chinook Regional Hospital, 960-19th Street South, Lethbridge, AB T1J 1W5, Canada
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26
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Zhang L, Li Y, Shao Y, Hu Y, Lou H, Chen X, Wu Y, Mei L, Zhou B, Zhang X, Yao W, Fang L, Zhang Y. Molecular Characterization and Antibiotic Resistant Profiles of Campylobacter Species Isolated From Poultry and Diarrheal Patients in Southeastern China 2017-2019. Front Microbiol 2020; 11:1244. [PMID: 32655522 PMCID: PMC7324532 DOI: 10.3389/fmicb.2020.01244] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Accepted: 05/15/2020] [Indexed: 01/02/2023] Open
Abstract
Campylobacter is a zoonotic pathogen that causes foodborne diarrheal illness globally. To better understand health risks in Southeastern China, Campylobacter spp. were surveyed in humans and representative poultry products over 3 years. One hundred and ninety-five representative isolates (n = 148, Campylobacter jejuni; n = 45, Campylobacter coli; n = 2 Campylobacter hyointestinalis) were examined for genetic relatedness and antimicrobial susceptibility. Nearly all Campylobacter isolates (99.0%, 193/195) were resistant to at least one class of antimicrobials, and 45.6% (89/195) of the isolates exhibited multidrug resistance. Genotypic analysis revealed high diversity among tested strains. Multilocus sequence typing (MLST) displayed 120 sequence types (STs) including 42 novel STs being added to the PubMLST international database. Sixty-two STs belonged to 16 previously characterized clonal complexes (CCs), of which CC-21, CC-45, CC-464, CC-574, CC-353, and CC-828 were most frequently identified. In addition, pulsed-field gel electrophoresis (PFGE) fingerprinting resulted in 66 PFGE SmaI patterns among the 125 isolates, with eight patterns shared between human and poultry sources. Subtyping data did not correlate with antimicrobial resistance phenotypes. Taken together, this large-scale surveillance study highlights high antimicrobial resistance and molecular features of Campylobacter isolates in Southeastern China.
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Affiliation(s)
- Leyi Zhang
- Wenzhou Center for Disease Control and Prevention, Wenzhou, China
| | - Yi Li
- Wenzhou Center for Disease Control and Prevention, Wenzhou, China
| | - Yongqiang Shao
- Wenzhou Center for Disease Control and Prevention, Wenzhou, China
| | - Yuqin Hu
- Wenzhou Center for Disease Control and Prevention, Wenzhou, China
| | - Huihuang Lou
- Wenzhou Center for Disease Control and Prevention, Wenzhou, China
| | - Xiaonan Chen
- Ouhai Center for Disease Control and Prevention, Ouhai, China
| | - Yuejin Wu
- Wenzhou Center for Disease Control and Prevention, Wenzhou, China
| | - Lingling Mei
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Biao Zhou
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | | | - Wenwu Yao
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Lei Fang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Yanjun Zhang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
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27
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Golz JC, Epping L, Knüver MT, Borowiak M, Hartkopf F, Deneke C, Malorny B, Semmler T, Stingl K. Whole genome sequencing reveals extended natural transformation in Campylobacter impacting diagnostics and the pathogens adaptive potential. Sci Rep 2020; 10:3686. [PMID: 32111893 PMCID: PMC7048796 DOI: 10.1038/s41598-020-60320-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 02/05/2020] [Indexed: 11/09/2022] Open
Abstract
Campylobacter is the major bacterial agent of human gastroenteritis worldwide and represents a crucial global public health burden. Species differentiation of C. jejuni and C. coli and phylogenetic analysis is challenged by inter-species horizontal gene transfer. Routine real-time PCR on more than 4000 C. jejuni and C. coli field strains identified isolates with ambiguous PCR results for species differentiation, in particular, from the isolation source eggs. K-mer analysis of whole genome sequencing data indicated the presence of C. coli hybrid strains with huge amounts of C. jejuni introgression. Recombination events were distributed over the whole chromosome. MLST typing was impaired, since C. jejuni sequences were also found in six of the seven housekeeping genes. cgMLST suggested that the strains were phylogenetically unrelated. Intriguingly, the strains shared a stress response set of C. jejuni variant genes, with proposed roles in oxidative, osmotic and general stress defence, chromosome maintenance and repair, membrane transport, cell wall and capsular biosynthesis and chemotaxis. The results have practical impact on routine typing and on the understanding of the functional adaption to harsh environments, enabling successful spreading and persistence of Campylobacter.
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Affiliation(s)
- Julia C Golz
- German Federal Institute for Risk Assessment, Department of Biological Safety, National Reference Laboratory for Campylobacter, Berlin, Germany
| | - Lennard Epping
- Robert Koch Institute, Microbial Genomics, Berlin, Germany
| | - Marie-Theres Knüver
- German Federal Institute for Risk Assessment, Department of Biological Safety, National Reference Laboratory for Campylobacter, Berlin, Germany
| | - Maria Borowiak
- German Federal Institute for Risk Assessment, Department of Biological Safety, Study Centre for Genome Sequencing and Analysis, Berlin, Germany
| | - Felix Hartkopf
- Robert Koch Institute, Microbial Genomics, Berlin, Germany
| | - Carlus Deneke
- German Federal Institute for Risk Assessment, Department of Biological Safety, Study Centre for Genome Sequencing and Analysis, Berlin, Germany
| | - Burkhard Malorny
- German Federal Institute for Risk Assessment, Department of Biological Safety, Study Centre for Genome Sequencing and Analysis, Berlin, Germany
| | | | - Kerstin Stingl
- German Federal Institute for Risk Assessment, Department of Biological Safety, National Reference Laboratory for Campylobacter, Berlin, Germany.
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28
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Hwang H, Isaacson RE, Singer RS. Comparison of relative expressions of genes involved in iron acquisition and regulation in fluoroquinolone-resistant and wild-type Campylobacter jejuni. Vet Microbiol 2020; 243:108615. [PMID: 32273001 DOI: 10.1016/j.vetmic.2020.108615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 02/16/2020] [Accepted: 02/17/2020] [Indexed: 11/16/2022]
Abstract
Campylobacteriosis caused by C. jejuni is a serious yet common foodborne disease in the U.S. The prevalence of fluoroquinolone-resistant C. jejuni from poultry has continued to increase despite the withdrawal of fluoroquinolone use in the U.S. poultry industry in 2005. To date, no clear selective pressures that explain this effect have been documented. In this study, we investigated limited bioavailability of iron in poultry and enhanced iron uptake and regulation as potential indirect selective pressures conferring fitness advantages in fluoroquinolone-resistant C. jejuni compared to its susceptible wild-type counterpart. Five fluoroquinolone-susceptible C. jejuni isolates were selected from litter collected from commercial broiler farms. Using antibiotic selection, five fluoroquinolone-resistant strains were created. Relative expressions of six genes involved in iron acquisition and regulation were compared between the resistant and susceptible strains using RT-qPCR under normal and iron-limiting conditions. High variability in the relative gene expressions was observed among the strains, with only one resistant strain showing the consistent upregulation of the measured genes compared to the matching susceptible wild-type. Our results suggest that the hypothesis tested in the study may not be an adequate explanation of the molecular mechanism behind the enhanced fitness of fluoroquinolone-resistant C. jejuni compared to susceptible C. jejuni. This study highlights the need for a better understanding of the complex ecology and dynamics of fluoroquinolone resistance in C. jejuni in poultry environment and warrants an examination of fluoroquinolone-resistant C. jejuni strains recovered from the natural broiler chicken environment.
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Affiliation(s)
- Haejin Hwang
- Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, MN, USA
| | - Richard E Isaacson
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN, USA
| | - Randall S Singer
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN, USA.
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29
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Palomares Velosa JE, Salman MD, Roman-Muniz IN, Reynolds S, Linke L, Magnuson R, McConnel CS, Rao S. Socio-ecological Factors of Zoonotic Diseases Exposure in Colorado Dairy Workers. J Agromedicine 2020; 26:151-161. [PMID: 32052708 DOI: 10.1080/1059924x.2020.1725700] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Objectives: Zoonotic pathogens on dairy farms are a known risk for people who work and live there. Exposure and/or transmission of Salmonella serovars, E. coli (O157; H7), Campylobacter jejuni, and Cryptosporidium parvum have been documented to occur in the dairy farm environment. Social ecological factors have been identified as determinants of preventive behaviors of people at risk of infectious diseases.Methods: This study described the effect of socio-ecological factors on selected zoonotic bacterial and protozoal diseases in 42 workers of two dairy farms.Results: Occupational exposure to Salmonella ser. Dublin, E. coli, and Campylobacter spp. was confirmed. Self-efficacy and negative workplace perceptions were risk factors for Salmonella Dublin exposure (OR = 1.43[95% CI 1.11-2.22] & 1.22 [95% CI 1.02-1.53] respectively,). Additionally, safety knowledge and risk perceptions were protective factors of exposure (OR = 0.90 [95% CI 0.79-1.00]). Positive perceptions of supervisors and coworkers was a protective factor of Campylobacter exposure (OR = 0.89 [95% CI 0.79-0.98]).Conclusion: Results indicated that the presence of a supporting organizational environment, good communication with supervisors and coworkers, and training on prevention of zoonotic diseases would potentially reduce occupational exposures to zoonotic diseases on these farms.
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Affiliation(s)
| | - Mo D Salman
- Animal Population Health Institute, Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA
| | | | - Stephen Reynolds
- Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, CO, USA
| | - Lyndsey Linke
- Animal Population Health Institute, Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA
| | - Roberta Magnuson
- Animal Population Health Institute, Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA
| | - Craig S McConnel
- Department of Veterinary Clinical Sciences, Washington State University, Pullman, WA, USA
| | - Sangeeta Rao
- Animal Population Health Institute, Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA
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30
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Bian X, Garber JM, Cooper KK, Huynh S, Jones J, Mills MK, Rafala D, Nasrin D, Kotloff KL, Parker CT, Tennant SM, Miller WG, Szymanski CM. Campylobacter Abundance in Breastfed Infants and Identification of a New Species in the Global Enterics Multicenter Study. mSphere 2020; 5:e00735-19. [PMID: 31941810 PMCID: PMC6968651 DOI: 10.1128/msphere.00735-19] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 12/09/2019] [Indexed: 12/15/2022] Open
Abstract
Campylobacter jejuni is a leading cause of bacterial diarrhea worldwide and is associated with high rates of mortality and growth stunting in children inhabiting low- to middle-resource countries. To better understand the impact of breastfeeding on Campylobacter infection in infants in sub-Saharan Africa and South Asia, we examined fecal microbial compositions, bacterial isolates, and their carbohydrate metabolic pathways in Campylobacter-positive infants <1 year of age from the Global Enterics Multicenter Study. Exclusively breastfed infants with diarrhea exhibited high Campylobacter abundances, and this negatively correlated with bacterial carbohydrate metabolism. Although C. jejuni and Campylobacter coli are prevalent among these infants, the second most abundant Campylobacter species was a new species, which we named "Candidatus Campylobacter infans." Asymptomatic Campylobacter carriers also possess significantly different proportions of specific gut microbes compared to diarrheal cases. These findings provide insight into Campylobacter infections in infants in sub-Saharan Africa and South Asia and help inform strategies aimed at eliminating campylobacteriosis in these areas.IMPORTANCECampylobacter is the primary cause of bacterial diarrhea in the United States and can lead to the development of the postinfectious autoimmune neuropathy known as Guillain-Barré syndrome. Also, drug-resistant campylobacters are becoming a serious concern both locally and abroad. In low- and middle-income countries (LMICs), infection with Campylobacter is linked to high rates of morbidity, growth stunting, and mortality in children, and breastfeeding is important for infant nutrition, development, and protection against infectious diseases. In this study, we examined the relationship between breastfeeding and Campylobacter infection and demonstrate the increased selection for C. jejuni and C. coli strains unable to metabolize fucose. We also identify a new Campylobacter species coinfecting these infants with a high prevalence in five of the seven countries in sub-Saharan Africa and South Asia examined. These findings indicate that more detailed studies are needed in LMICs to understand the Campylobacter infection process in order to devise a strategy for eliminating this pathogenic microbe.
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Affiliation(s)
- Xiaoming Bian
- Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia, USA
- Department of Microbiology, University of Georgia, Athens, Georgia, USA
| | - Jolene M Garber
- Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia, USA
- Department of Microbiology, University of Georgia, Athens, Georgia, USA
| | - Kerry K Cooper
- School of Animal and Comparative Biomedical Sciences, University of Arizona, Tucson, Arizona, USA
| | - Steven Huynh
- Produce Safety and Microbiology Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Albany, California, USA
| | - Jennifer Jones
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Michael K Mills
- Department of Microbiology, University of Georgia, Athens, Georgia, USA
| | - Daniel Rafala
- Department of Microbiology, University of Georgia, Athens, Georgia, USA
| | - Dilruba Nasrin
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Karen L Kotloff
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Craig T Parker
- Produce Safety and Microbiology Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Albany, California, USA
| | - Sharon M Tennant
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - William G Miller
- Produce Safety and Microbiology Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Albany, California, USA
| | - Christine M Szymanski
- Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia, USA
- Department of Microbiology, University of Georgia, Athens, Georgia, USA
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31
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Karama M, Kambuyi K, Cenci-Goga BT, Malahlela M, Jonker A, He C, Ombui J, Tshuma T, Etter E, Kalake A. Occurrence and Antimicrobial Resistance Profiles of Campylobacter jejuni, Campylobacter coli, and Campylobacter upsaliensis in Beef Cattle on Cow-Calf Operations in South Africa. Foodborne Pathog Dis 2020; 17:440-446. [PMID: 31934792 DOI: 10.1089/fpd.2019.2703] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
This study investigated occurrence and antimicrobial resistance profiles of Campylobacter spp. isolates in beef cattle on five cow-calf operations in South Africa. A total of 537 fecal samples from adult beef cattle (n = 435) and rectal swabs from calves (n = 102) were screened for Campylobacter jejuni, Campylobacter coli, and Campylobacter upsaliensis by culture and polymerase chain reaction. Furthermore, 86 Campylobacter spp. isolates including 46 C. jejuni, 24 C. coli, and 16 C. upsaliensis were tested for antimicrobial resistance against a panel of 9 antimicrobials. Overall, Campylobacter spp. was detected in 29.7% of cattle. Among the 158 Campylobacter spp.-positive cattle, 61.8% carried C. jejuni, 25% carried C. coli, and 10% carried C. upsaliensis. Five animals (3.1%) had mixed infections: three cows carried C. jejuni and C. coli concurrently, one cow had both C. jejuni and C. upsaliensis, and one cow harbored C. coli and C. upsaliensis. Antimicrobial resistance profiling among 86 Campylobacter spp. isolates revealed that 52.3% of the isolates were resistant to one or more antimicrobials. Antimicrobial resistance was observed in 46.7% of C. jejuni isolates, 35.6% of C. coli, and 17.8% of C. upsaliensis. Thirty-six percent of isolates were resistant to clindamycin, 19.7% to nalidixic acid, 18.6% to tetracycline, and 17.4% to erythromycin. Lower resistance rates were recorded for azithromycin (8.1%), florfenicol (3.4%), gentamicin (4.8%), and telithromycin and ciprofloxacin (5.8%). Multidrug resistance (MDR) was observed in 32.5% of isolates. Significantly higher levels of MDR were detected among C. jejuni (36.9%) and C. coli (33.3%) isolates in comparison to C. upsaliensis (18.7%). Two main multiresistance patterns were detected: nalidixic acid/clindamycin (17.8%) and tetracycline/clindamycin (14.2%). To the best of our knowledge, this is the first study which has shown that beef cattle on cow-calf operations in South Africa constitute an important reservoir and a potential source of clinically relevant and antimicrobial resistant Campylobacter spp. strains.
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Affiliation(s)
- Musafiri Karama
- Veterinary Public Health Section, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - Katembue Kambuyi
- Veterinary Public Health Section, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - Beniamino T Cenci-Goga
- Laboratorio di Ispezione degli Alimenti di Origine Animale, Dipartimento di Medicina Veterinaria, University of Perugia, Perugia, Italy
| | - Mogaugedi Malahlela
- Veterinary Public Health Section, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - Annelize Jonker
- Department of Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - Cheng He
- College of Life Science and Engineering, Foshan University, Foshan, China.,Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Jackson Ombui
- Department of Public Health, Pharmacology and Toxicology, College of Agriculture and Veterinary Sciences, University of Nairobi, Nairobi, Kenya
| | - Takula Tshuma
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - Eric Etter
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa.,Centre de Coopération Internationale en Recherche Agronomique pour le Développement-INRA, UMR ASTRE Baillarguet International Campus, University of Montpellier, Montpellier, France
| | - Alan Kalake
- Gauteng Department of Agriculture and Rural Development, Johannesburg, South Africa
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32
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Du J, Luo J, Huang J, Wang C, Li M, Wang B, Wang B, Chang H, Ji J, Sen K, He H. Emergence of Genetic Diversity and Multi-Drug Resistant Campylobacter jejuni From Wild Birds in Beijing, China. Front Microbiol 2019; 10:2433. [PMID: 31736887 PMCID: PMC6829156 DOI: 10.3389/fmicb.2019.02433] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 10/09/2019] [Indexed: 01/21/2023] Open
Abstract
Campylobacter jejuni (C. jejuni) is considered as an opportunistic zoonotic pathogen that may cause gastroenteritis in humans and other animals. Wild birds may be as potential vectors of C. jejuni around urban and suburban areas. Here, 520 samples were collected from 33 wild bird species in urban and suburban areas, Beijing. In total 57 C. jejuni were isolated from seven species. It was found that Nineteen (33.33%, 19/57) isolates were resistant to at least one of 11 antibiotics, especially streptomycin (36.84%) and four isolates resistant to all. Nineteen (33.33%, 19/57) isolates were multi-drug resistance. Multilocus sequence typing (MLST) analysis of the isolates showed that 36 different sequence types (STs) belonged to four Clonal complexes and unassigned. Twenty STs (55.56%) and six alleles among them were first detected. Virulence genes including flaA, cadF, and the cytolethal distending toxin (CDT) gene cluster, were detected in all isolates, but truncated cdt gene clusters only detected in the isolates from the crow, daurian jackdaw and silver pheasant. In conclusion, it was the first detection of C. jejuni involved truncated cdt gene clusters from the silver pheasant. These wild birds around urban and suburban areas may pose potential public health problems as reservoir vectors of C. jejuni.
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Affiliation(s)
- Juan Du
- National Research Center for Wildlife Borne Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of the Chinese Academy of Sciences, Beijing, China
| | - Jing Luo
- National Research Center for Wildlife Borne Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Jingjing Huang
- National Research Center for Wildlife Borne Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of the Chinese Academy of Sciences, Beijing, China
| | - Chengmin Wang
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public, Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou, China
| | - Meng Li
- National Research Center for Wildlife Borne Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Bojun Wang
- Beijing Wildlife Rescue Center, Beijing Municipal Bureau of Landscape and Forestry, Beijing, China
| | - Bo Wang
- National Research Center for Wildlife Borne Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Han Chang
- National Research Center for Wildlife Borne Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Jianwei Ji
- Beijing Wildlife Rescue Center, Beijing Municipal Bureau of Landscape and Forestry, Beijing, China
| | - Keya Sen
- Division of Biological Sciences, Science, Technology, Engineering and Mathematics, University of Washington, Bothell, WA, United States
| | - Hongxuan He
- National Research Center for Wildlife Borne Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
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33
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Rimmer JE, Harro C, Sack DA, Talaat KR, Gutierrez RL, DeNearing B, Brubaker J, Laird RM, Poly F, Maue AC, Jaep K, Alcala A, Mochalova Y, Gariepy CL, Chakraborty S, Guerry P, Tribble DR, Porter CK, Riddle MS. Rifaximin Fails to Prevent Campylobacteriosis in the Human Challenge Model: A Randomized, Double-Blind, Placebo-Controlled Trial. Clin Infect Dis 2019; 66:1435-1441. [PMID: 29145631 DOI: 10.1093/cid/cix1014] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 11/13/2017] [Indexed: 12/15/2022] Open
Abstract
Background Campylobacter species are a leading cause of diarrheal disease globally with significant morbidity. Primary prevention efforts have yielded limited results. Rifaximin chemoprophylaxis decreases rates of travelers' diarrhea and may be suitable for high-risk persons. We assessed the efficacy of rifaximin in the controlled human infection model for Campylobacter jejuni. Methods Twenty-eight subjects were admitted to an inpatient facility and randomized to a twice-daily dose of 550 mg rifaximin or placebo. The following day, subjects ingested 1.7 × 105 colony-forming units of C. jejuni strain CG8421. Subjects continued prophylaxis for 3 additional days, were followed for campylobacteriosis for 144 hours, and were subsequently treated with azithromycin and ciprofloxacin. Samples were collected to assess immunologic responses to CG8421. Results There was no difference (P = 1.0) in the frequency of campylobacteriosis in those receiving rifaximin (86.7%) or placebo (84.6%). Additionally, there were no differences in the clinical signs and symptoms of C. jejuni infection to include abdominal pain/cramps (P = 1.0), nausea (P = 1.0), vomiting (P = .2), or fever (P = 1.0) across study groups. Immune responses to the CG8421 strain were comparable across treatment groups. Conclusions Rifaximin did not prevent campylobacteriosis in this controlled human infection model. Given the morbidity associated with Campylobacter infection, primary prevention efforts remain a significant need. Clinical Trials Registration NCT02280044.
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Affiliation(s)
- Joanna E Rimmer
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland.,School of Immunity and Infection, University of Birmingham.,Academic Department of Military Medicine, Royal Centre for Defence Medicine (Academia and Research), Medical Directorate, Joint Medical Command, Information and Communications Technology Centre, Birmingham Research Park, United Kingdom
| | - Clayton Harro
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore
| | - David A Sack
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore
| | - Kawsar R Talaat
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore
| | - Ramiro L Gutierrez
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - Barbara DeNearing
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore
| | - Jessica Brubaker
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore
| | - Renee M Laird
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - Frédéric Poly
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - Alexander C Maue
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - Kayla Jaep
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - Ashley Alcala
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - Yelizaveta Mochalova
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - Christina L Gariepy
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - Subhra Chakraborty
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore
| | - Patricia Guerry
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - David R Tribble
- Infectious Disease Clinical Research Program, Uniformed Services University of the Health Sciences, Bethesda, Maryland
| | - Chad K Porter
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - Mark S Riddle
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
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Karama M, Cenci-Goga BT, Prosperi A, Etter E, El-Ashram S, McCrindle C, Ombui JN, Kalake A. Prevalence and risk factors associated with Campylobacter spp. occurrence in healthy dogs visiting four rural community veterinary clinics in South Africa. ACTA ACUST UNITED AC 2019; 86:e1-e6. [PMID: 31170781 PMCID: PMC6556946 DOI: 10.4102/ojvr.v86i1.1673] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 01/14/2019] [Accepted: 01/17/2019] [Indexed: 11/01/2022]
Abstract
Reports on the occurrence of Campylobacter spp. in dogs in South Africa are non-existent. This study investigated the prevalence of Campylobacter spp. in 481 dogs visiting four rural community veterinary clinics in South Africa. Dogs were screened for Campylobacter spp. by culture and polymerase chain reaction (PCR), and logistic regression analysis was performed to assess the association between sex, clinic, breed and age and the occurrence of Campylobacter spp. in dogs. The prevalence of Campylobacter spp. was 41.50% (95% confidence interval [CI], 37.39% - 46.04%). Campylobacter jejuni, C. upsaliensis and C. coli were detected in 29.31% (95% CI, 25.42% - 33.54%), 13.10% (95% CI, 10.37% - 16.42%) and 5.41% (95% CI, 3.71% - 7.82%) of dogs, respectively. Dogs carrying more than one species of Campylobacter spp. accounted for 6.23% (95% CI, 4.40% - 8.78%). Campylobacter upsaliensis and C. jejuni were detected in 3.74% (95% CI, 2.37% - 5.86%), whereas C. coli and C. jejuni were found in 2.49% (95% CI, 1.42% - 4.34%) of dogs. Age and clinic were the risk factors significantly associated with Campylobacter spp. occurrence, while age, breed and clinic were predictors of C. jejuni carriage. Furthermore, age was the only risk factor associated with a higher likelihood of carrying C. upsaliensis. The prevalence of Campylobacter spp. C. jejuni and C. upsaliensis increased significantly as dogs grew older. In addition, the odds of carrying Campylobacter spp. were higher in the Staffordshire bull terrier breed compared to crossbreed dogs. In conclusion, this study shows that dogs visiting rural community veterinary clinics in South Africa are reservoirs of Campylobacter spp. and may be potential sources of Campylobacter spp. for humans living in close proximity of the dog populations under study.
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Affiliation(s)
- Musafiri Karama
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Onderstepoort.
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Inglis GD, Boras VF, Webb AL, Suttorp VV, Hodgkinson P, Taboada EN. Enhanced microbiological surveillance reveals that temporal case clusters contribute to the high rates of campylobacteriosis in a model agroecosystem. Int J Med Microbiol 2019; 309:232-244. [PMID: 31076242 DOI: 10.1016/j.ijmm.2019.04.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 02/26/2019] [Accepted: 04/18/2019] [Indexed: 10/26/2022] Open
Abstract
Infections by pathogenic Campylobacter species were determined in diarrheic (n = 2,217) and non-diarrheic control (n = 104) people in Southwestern Alberta (SWA), Canada over a 1-year period using specialized and conventional isolation, and direct PCR. Overall, 9.9% of diarrheic individuals were positive for C. jejuni (9.1%), C. upsaliensis (0.6%), and C. coli (0.5%). No C. lari was detected. Four diarrheic individuals were co-infected with C. jejuni and C. coli, and four different individuals were co-infected with C. jejuni and C. upsaliensis. Two control individuals were positive for C. jejuni. Approximately 50% of stools containing C. jejuni and/or C. coli were deemed negative by conventional isolation. Direct PCR for C. jejuni was less effective than culture-based detection. Most C. jejuni infections occurred in people living in the urban centers, but the prevalence of the bacterium was lower in females than males living in urban locations, and both males and females living in rural locations. Although C. jejuni was detected throughout the year, a trend for higher infection rates was observed in the late spring to early fall with a peak in August. Forty-six C. jejuni subtype clusters were identified, including 44 temporal case clusters attributed to 28 subtype groupings. The majority of infections (70.3%) were linked to subtypes associated with beef cattle. We conclude that many occurrences of pathogenic Campylobacter species were not detected by the conventional laboratory methodology, and temporal case clusters of C. jejuni subtypes associated with cattle contribute to the high rates of campylobacteriosis in SWA.
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Affiliation(s)
- G Douglas Inglis
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada.
| | - Valerie F Boras
- Department of Laboratory Medicine, Chinook Regional Hospital, Lethbridge, AB, Canada
| | - Andrew L Webb
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada
| | - Vivien V Suttorp
- Medical Officer of Health, Alberta Health Services, Lethbridge, AB, Canada
| | - Pamela Hodgkinson
- Environmental Public Health, Alberta Health Services, Medicine Hat, AB, Canada
| | - Eduardo N Taboada
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
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Cerdà-Cuéllar M, Moré E, Ayats T, Aguilera M, Muñoz-González S, Antilles N, Ryan PG, González-Solís J. Do humans spread zoonotic enteric bacteria in Antarctica? THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 654:190-196. [PMID: 30445320 DOI: 10.1016/j.scitotenv.2018.10.272] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 10/19/2018] [Accepted: 10/19/2018] [Indexed: 05/21/2023]
Abstract
Reports of enteric bacteria in Antarctic wildlife have suggested its spread from people to seabirds and seals, but evidence is scarce and fragmentary. We investigated the occurrence of zoonotic enteric bacteria in seabirds across the Antarctic and subantarctic region; for comparison purposes, in addition to seabirds, poultry in a subantarctic island was also sampled. Three findings suggest reverse zoonosis from humans to seabirds: the detection of a zoonotic Salmonella serovar (ser. Enteritidis) and Campylobacter species (e.g. C. jejuni), typical of human infections; the resistance of C. lari isolates to ciprofloxacin and enrofloxacin, antibiotics commonly used in human and veterinary medicine; and most importantly, the presence of C. jejuni genotypes mostly found in humans and domestic animals but rarely or never found in wild birds so far. We also show further spread of zoonotic agents among Antarctic wildlife is facilitated by substantial connectivity among populations of opportunistic seabirds, notably skuas (Stercorarius). Our results highlight the need for even stricter biosecurity measures to limit human impacts in Antarctica.
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Affiliation(s)
- Marta Cerdà-Cuéllar
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
| | - Elisabet Moré
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Teresa Ayats
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Mònica Aguilera
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Sara Muñoz-González
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Noelia Antilles
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Peter G Ryan
- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, Rondebosch 7701, South Africa
| | - Jacob González-Solís
- Institut de Recerca de la Biodiversitat (IRBio) and Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Universitat de Barcelona, 08028 Barcelona, Spain
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Ricke SC, Feye KM, Chaney WE, Shi Z, Pavlidis H, Yang Y. Developments in Rapid Detection Methods for the Detection of Foodborne Campylobacter in the United States. Front Microbiol 2019; 9:3280. [PMID: 30728816 PMCID: PMC6351486 DOI: 10.3389/fmicb.2018.03280] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 12/17/2018] [Indexed: 12/27/2022] Open
Abstract
The accurate and rapid detection of Campylobacter spp. is critical for optimal surveillance throughout poultry processing in the United States. The further development of highly specific and sensitive assays to detect Campylobacter in poultry matrices has tremendous utility and potential for aiding the reduction of foodborne illness. The introduction and development of molecular methods such as polymerase chain reaction (PCR) have enhanced the diagnostic capabilities of the food industry to identify the presence of foodborne pathogens throughout poultry production. Further innovations in various methodologies, such as immune-based typing and detection as well as high throughput analyses, will provide important epidemiological data such as the identification of unique or region-specific Campylobacter. Comparable to traditional microbiology and enrichment techniques, molecular techniques/methods have the potential to have improved sensitivity and specificity, as well as speed of data acquisition. This review will focus on the development and application of rapid molecular methods for identifying and quantifying Campylobacter in U.S. poultry and the emergence of novel methods that are faster and more precise than traditional microbiological techniques.
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Affiliation(s)
- Steven C. Ricke
- Department of Food Science, Center of Food Safety, University of Arkansas, Fayetteville, AR, United States
| | - Kristina M. Feye
- Department of Food Science, Center of Food Safety, University of Arkansas, Fayetteville, AR, United States
| | | | - Zhaohao Shi
- Department of Food Science, Center of Food Safety, University of Arkansas, Fayetteville, AR, United States
| | | | - Yichao Yang
- Department of Poultry Science, University of Arkansas, Fayetteville, AR, United States
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38
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He K, Zhang X, Chen L, Zhao R, Wang L. Sensitive detection of Campylobacter jejuni using one-step strategy based on functional nanospheres of immunomagnetic capture and quantum dots. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 163:274-278. [PMID: 30056341 DOI: 10.1016/j.ecoenv.2018.07.050] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 07/04/2018] [Accepted: 07/12/2018] [Indexed: 06/08/2023]
Abstract
Campylobacter jejuni has emerged as the most common bacterial foodborne illness in the developed world. Here, we demonstrate a convenient one-step strategy for detecting C. jejuni. Immunomagnetic nanospheres (IMNS) and immunofluorescent nanospheres (IFNS, quantum dots) were used for the simultaneous, sensitive capture and recognition of C. jejuni. After magnetic separation with the IMNS, detection of C. jejuni was achieved with fluorescence measurement of the IFNS in the sandwich complexes (IMNS-bacteria-IFNS). The limit of detection of this assay was 103 CFU/mL, and the linear range was from 105 to 107 CFU/mL (R2 = 0.9994). When compared with a conventional two-step detection strategy, in which C. jejuni was first captured with the IMNS and then detected using the IFNS, this one-step detection strategy enhance sensitivity and save time. This suggested that the developed method has the potential for use as an alternative to the standard method for food quality assurance, as it provides rapid detection of C. jejuni in foodstuffs and the environment.
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Affiliation(s)
- Kuo He
- Food Safety Centre, Hebei North University, Zhangjiakou 075000, China
| | - Xiuyuan Zhang
- Food Safety Centre, Hebei North University, Zhangjiakou 075000, China; College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Lin Chen
- College of Food Engineering, Henan University of Animal Husbandry and Economy, Zhenzhou, 450046, China
| | - Ruiping Zhao
- Food Safety Centre, Hebei North University, Zhangjiakou 075000, China
| | - Lixia Wang
- Food Safety Centre, Hebei North University, Zhangjiakou 075000, China
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Kabir SML, Chowdhury N, Asakura M, Shiramaru S, Kikuchi K, Hinenoya A, Neogi SB, Yamasaki S. Comparison of Established PCR Assays for Accurate Identification of Campylobacter jejuni and Campylobacter coli. Jpn J Infect Dis 2018; 72:81-87. [PMID: 30381691 DOI: 10.7883/yoken.jjid.2018.340] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Proper surveillance of Campylobacter jejuni and Campylobacter coli, major pathogens associated with human gastroenteritis, is necessary to tackle the increasing disease burden. To detect these pathogenic species, a variety of PCR assays have been developed. This study examined the sensitivity and specificity of 12 PCR assays targeting 23S rRNA, ceuE, lpxA, hipO, mapA, ask, and cdt genes of C. jejuni and C. coli. The sensitivities of PCR assays were 85.2-100%, and 97-100%, and the specificities were 90.5-100%, and 94.3-100% for the tested C. jejuni (n = 61) and C. coli (n = 33) strains, respectively. Two PCR assays, targeting cdtC and hipO genes, were found to be 100% sensitive and/or specific for all C. jejuni strains, while 3 assays, targeting cdtB, cdtA, and ask genes, were 100% sensitive and/or specific for C. coli strains. However, PCR assays for hipO and ask genes are problematic to conduct simultaneously due to the differences in PCR conditions. Overall, multiplex PCR assays targeting cdtC and cdtB genes, encoding 2 subunits of the same toxin, were concluded to be the most reliable. The results of this study would aid in proper surveillance of C. jejuni and C. coli and adopting intervention strategies in the near future.
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Affiliation(s)
- S M Lutful Kabir
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University.,Department of Microbiology and Hygiene, Bangladesh Agricultural University
| | | | - Masahiro Asakura
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University
| | - Sachi Shiramaru
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University
| | - Ken Kikuchi
- Department of Infection Control Science, Faculty of Medicine, Juntendo University
| | - Atsushi Hinenoya
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University
| | - Sucharit Basu Neogi
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University
| | - Shinji Yamasaki
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University
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Iglesias-Torrens Y, Miró E, Guirado P, Llovet T, Muñoz C, Cerdà-Cuéllar M, Madrid C, Balsalobre C, Navarro F. Population Structure, Antimicrobial Resistance, and Virulence-Associated Genes in Campylobacter jejuni Isolated From Three Ecological Niches: Gastroenteritis Patients, Broilers, and Wild Birds. Front Microbiol 2018; 9:1676. [PMID: 30116225 PMCID: PMC6083060 DOI: 10.3389/fmicb.2018.01676] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 07/04/2018] [Indexed: 11/13/2022] Open
Abstract
Campylobacter jejuni is the causal agent of the food-borne infection with the highest incidence in Europe. Both poultry and wild birds are a major reservoir. To gain insight into the population structure, virulence potential, and antimicrobial resistance (AMR), a collection of 150 isolates from three different ecological niches (broilers, wild birds, and human patients) was studied. Despite the high genetic diversity found, the population structure defined two distinct clusters, one formed mostly by broiler and human isolates and another one by most wild bird isolates. The ST-21 complex exhibits highest prevalence (in humans and broilers), followed by ST-1275 complex (only in wild birds). The ST-48, -45, and -354 complexes were found in all three niches, but represent only 22 out of 150 studied strains. A higher occurrence of AMR and multidrug resistance was detected among broiler and human isolates. Moreover, significant differences were found in the distribution of certain putative virulence genes. Remarkably, many wild bird strains were negative for either cdtA, cdtB, or cdtC from the canonical strain 81-176, whereas all broiler and human strains were positive. These data suggest that the different variants of the cdt genes might be relevant for the efficient colonization of certain hosts by C. jejuni. Our study contributes to the understanding of the role of the diverse Campylobacter reservoirs in the transmission of campylobacteriosis to humans.
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Affiliation(s)
- Yaidelys Iglesias-Torrens
- Hospital de la Santa Creu i Sant Pau, Institut d’Investigació Biomèdica Sant Pau (IIB Sant Pau), Barcelona, Spain
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Elisenda Miró
- Hospital de la Santa Creu i Sant Pau, Institut d’Investigació Biomèdica Sant Pau (IIB Sant Pau), Barcelona, Spain
| | - Pedro Guirado
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Barcelona, Spain
| | - Teresa Llovet
- Hospital de la Santa Creu i Sant Pau, Institut d’Investigació Biomèdica Sant Pau (IIB Sant Pau), Barcelona, Spain
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Carmen Muñoz
- Hospital de la Santa Creu i Sant Pau, Institut d’Investigació Biomèdica Sant Pau (IIB Sant Pau), Barcelona, Spain
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Marta Cerdà-Cuéllar
- Centre de Recerca en Sanitat Animal (CReSA)-IRTA, Campus de la Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Cristina Madrid
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Barcelona, Spain
| | - Carlos Balsalobre
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Barcelona, Spain
| | - Ferran Navarro
- Hospital de la Santa Creu i Sant Pau, Institut d’Investigació Biomèdica Sant Pau (IIB Sant Pau), Barcelona, Spain
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, Barcelona, Spain
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Carron M, Chang YM, Momanyi K, Akoko J, Kiiru J, Bettridge J, Chaloner G, Rushton J, O’Brien S, Williams N, Fèvre EM, Häsler B. Campylobacter, a zoonotic pathogen of global importance: Prevalence and risk factors in the fast-evolving chicken meat system of Nairobi, Kenya. PLoS Negl Trop Dis 2018; 12:e0006658. [PMID: 30102697 PMCID: PMC6122836 DOI: 10.1371/journal.pntd.0006658] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 09/04/2018] [Accepted: 07/02/2018] [Indexed: 11/18/2022] Open
Abstract
Campylobacteriosis is a leading foodborne zoonosis worldwide, and is frequently associated with handling and consumption of poultry meat. Various studies indicate that Campylobacter causes a substantial human disease burden in low to middle-income countries, but data regarding the organism's epidemiology in countries like Kenya are scarce. In sub-Saharan Africa, 3.8 million deaths of children under-5 years of age are reported annually. Of those, 25% are caused by diarrheal diseases, and Campylobacter is one of the most frequently isolated bacteria from diarrheic children. With the growth of urban conglomerates, such as Kenya's capital, Nairobi, changes in diets, food production systems, and retailing dynamics, it is likely that exposure and susceptibility to this pathogen will change. Therefore, the importance of Campylobacter disease burden in Kenya may increase further. The objectives of this study were: 1) to determine the prevalence of Campylobacter spp. in Nairobi's small-scale chicken farms and meat retailers, and 2) to identify potential risk factors associated with its presence in those sites. The prevalence data provides the first detailed baseline for this pathogen in the urban Kenyan context. The risk factors provide context-specific insights for disease managers. A cross-sectional study of broiler, indigenous chicken farms, and chicken meat retailers, was conducted in a peri-urban, low to middle-income area (Dagoretti), and a very-low income informal settlement (Kibera) of Nairobi. Chicken faeces were collected using one pair of boot socks per farm, and 3 raw chicken meat samples were purchased per retailer. Samples were cultured for viable Campylobacter spp. using mCCDA, followed by blood agar plates in aerobic/microaerobic conditions for prevalence calculations. A questionnaire-based survey on sanitary, sourcing and selling practices was conducted at each site for risk factor identification using logistic regression analyses. A total of 171 farm premises and 53 retailers were sampled and interviewed. The prevalence results for Campylobacter spp. were between 33 to 44% for broiler and indigenous chicken farms, 60% and 64% for retailers, in Dagoretti and Kibera, respectively. Univariable logistic regression showed an association between Campylobacter spp. presence and the easiness of cleaning the display material used by the retailer. Restricting access to the flock was also associated with the pathogen's presence. Multivariable logistic regression identified the selling of defrosted meat as a retailer risk factor (OR: 4.69; 95% CI: 1.31-19.97), calling for more investigation of the reported repetitive freezing-thawing processes and cold chain improvement options. At the farm-level, having a pen floor of material not easy to clean was found to increase the risk (OR: 2.31; 95%CI: 1.06-5.37). The relatively high prevalence of Campylobacter spp. across different areas and value chain nodes indicates a clear human exposure risk. The open nature of both small-scale broiler and indigenous chicken production practices with low biosecurity, hygiene and informal transactions, likely plays a role in this. While gradual improvement of farm biosecurity is recommended, risk factors identified suggest that consumer education and enforcement of basic food safety principles at the retailer end of the food continuum represent key targets for risk reduction in informal settings.
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Affiliation(s)
- Maud Carron
- Royal Veterinary College (RVC), Pathobiology and Population Sciences, Hatfield, United Kingdom
- Leverhulme Centre for Integrative Research on Agriculture and Health (LCIRAH), London, United Kingdom
| | - Yu-Mei Chang
- Royal Veterinary College (RVC), Pathobiology and Population Sciences, Hatfield, United Kingdom
| | - Kelvin Momanyi
- International Livestock Research Institute (ILRI), Animal and Human Health Programme, Nairobi, Kenya
| | - James Akoko
- International Livestock Research Institute (ILRI), Animal and Human Health Programme, Nairobi, Kenya
| | - John Kiiru
- Centre for Microbiology Research, Kenya Medical Research Institute (KEMRI), Nairobi, Kenya
| | - Judy Bettridge
- International Livestock Research Institute (ILRI), Animal and Human Health Programme, Nairobi, Kenya
- Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Neston, United Kingdom
| | - Gemma Chaloner
- Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Neston, United Kingdom
| | - Jonathan Rushton
- Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Neston, United Kingdom
| | - Sarah O’Brien
- Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Neston, United Kingdom
| | - Nicola Williams
- Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Neston, United Kingdom
| | - Eric M. Fèvre
- International Livestock Research Institute (ILRI), Animal and Human Health Programme, Nairobi, Kenya
- Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Neston, United Kingdom
| | - Barbara Häsler
- Royal Veterinary College (RVC), Pathobiology and Population Sciences, Hatfield, United Kingdom
- Leverhulme Centre for Integrative Research on Agriculture and Health (LCIRAH), London, United Kingdom
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de Castro Burbarelli MF, do Valle Polycarpo G, Deliberali Lelis K, Granghelli CA, Carão de Pinho AC, Ribeiro Almeida Queiroz S, Fernandes AM, Moro de Souza RL, Gaglianone Moro ME, de Andrade Bordin R, de Albuquerque R. Cleaning and disinfection programs against Campylobacter jejuni for broiler chickens: productive performance, microbiological assessment and characterization. Poult Sci 2018; 96:3188-3198. [PMID: 28854757 PMCID: PMC5850738 DOI: 10.3382/ps/pex153] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 05/10/2017] [Indexed: 12/14/2022] Open
Abstract
Detailed cleaning and disinfection programs aims to reduce infection pressure from microorganisms from one flock to the next. However, studies evaluating the benefits to poultry performance, the sanitary status of the facilities, and the sanitary quality of the meat are rarely found. Thus, this study was designed to evaluate 2 cleaning and disinfecting programs regarding their influence on productive performance, elimination of Campylobacter, and characterization of Campylobacter jejuni strains when applied to broiler chickens’ facilities. Two subsequent flocks with 960 birds each were distributed into 32 pens containing 30 birds each. In the first, the whole flock was inoculated with a known strain of Campylobacter jejuni in order to contaminate the environment. In the second flock, performance and microbiological evaluations were done, characterizing an observational study between 2 cleaning and disinfection programs, regular and proposed. The regular program consisted of sweeping facilities, washing equipment and environment with water and neutral detergent. The proposed cleaning program consisted of dry and wet cleaning, application of 2 detergents (one acid and one basic) and 2 disinfectants (250 g/L glutaraldehyde and 185 g/L formaldehyde at 0.5% and 210 g/L para-chloro-meta-cresol at 4%). Total microorganism count in the environment and Campylobacter spp. identification were done for the microbiological assessment of the environment and carcasses. The positive samples were submitted to molecular identification of Campylobacter spp. and posterior genetic sequencing of the species identified as Campylobacter jejuni. The birds housed in the facilities and submitted to the proposed treatment had better performance when compared to the ones in the regular treatment, most likely because there was a smaller total microorganism count on the floor, walls, feeders and drinkers. The proposed program also resulted in a reduction of Campylobacter spp. on floors, drinkers and birds. Moreover, it was possible to identify 6 different Campylobacter jejuni strains in the facilities. The proposed treatment resulted in a positive influence on the birds’ performance and reduction of environment contamination for broiler chickens.
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Affiliation(s)
- Maria Fernanda de Castro Burbarelli
- Department of Animal Nutrition and Production (VNP), Faculty of Veterinary Medicine and Animal Science, University of São Paulo (FMVZ-USP), Pirassununga, Brazil.
| | | | - Karoline Deliberali Lelis
- Department of Animal Nutrition and Production (VNP), Faculty of Veterinary Medicine and Animal Science, University of São Paulo (FMVZ-USP), Pirassununga, Brazil
| | - Carlos Alexandre Granghelli
- Department of Animal Nutrition and Production (VNP), Faculty of Veterinary Medicine and Animal Science, University of São Paulo (FMVZ-USP), Pirassununga, Brazil
| | - Agatha Cristina Carão de Pinho
- Department of Animal Nutrition and Production (VNP), Faculty of Veterinary Medicine and Animal Science, University of São Paulo (FMVZ-USP), Pirassununga, Brazil
| | - Sabrina Ribeiro Almeida Queiroz
- Department of Veterinary Medicine, Faculty of Veterinary Medicine and Animal Science, University of São Paulo (FZEA-USP), Pirassununga, Brazil
| | - Andrezza Maria Fernandes
- Department of Veterinary Medicine, Faculty of Veterinary Medicine and Animal Science, University of São Paulo (FZEA-USP), Pirassununga, Brazil
| | - Ricardo Luiz Moro de Souza
- Department of Veterinary Medicine, Faculty of Veterinary Medicine and Animal Science, University of São Paulo (FZEA-USP), Pirassununga, Brazil
| | - Maria Estela Gaglianone Moro
- Department of Veterinary Medicine, Faculty of Veterinary Medicine and Animal Science, University of São Paulo (FZEA-USP), Pirassununga, Brazil
| | | | - Ricardo de Albuquerque
- Department of Animal Nutrition and Production (VNP), Faculty of Veterinary Medicine and Animal Science, University of São Paulo (FMVZ-USP), Pirassununga, Brazil
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Campylobacter jejuni Colonization in the Crow Gut Involves Many Deletions within the Cytolethal Distending Toxin Gene Cluster. Appl Environ Microbiol 2018; 84:AEM.01893-17. [PMID: 29330183 DOI: 10.1128/aem.01893-17] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 12/13/2017] [Indexed: 01/13/2023] Open
Abstract
Campylobacter spp. are major causes of gastroenteritis worldwide. The virulence potential of Campylobacter shed in crow feces obtained from a roost area in Bothell, Washington, was studied and compared with that from isolates from other parts of Washington and from a different crow species 7,000 miles away in Kolkata, India. Campylobacter organisms were isolated from 61% and 69% of the fecal samples obtained from Washington and Kolkata, respectively, and were confirmed to be C. jejuni The cytolethal distending toxin (CDT) gene cluster from these isolates revealed a truncated sequence of approximately 1,350 bp. Sequencing of the gene cluster revealed two types of mutations: a 668-bp deletion across cdtA and cdtB and a 51-bp deletion within cdtB Some strains had additional 20-bp deletions in cdtB In either case, a functional toxin is not expected; a functional toxin is produced by the expression of three tandem genes, cdtA, cdtB, and cdtC Reverse transcriptase PCR with total RNA extracted from the isolates showed no expression of cdtB A toxin assay performed with these isolates on HeLa cells failed to show cytotoxic effects on the cells. However, the isolates were able to colonize the chicken ceca for a period of at least 4 weeks, similar to that of a clinical isolate. Other virulence gene markers, flagellin A and CadF, were present in 100% of the isolates. Our study suggests that crows carry the bacterium C. jejuni but with a dysfunctional toxin protein that is expected to drastically reduce its potential to cause diarrhea.IMPORTANCE Campylobacters are a major cause of gastroenteritis in humans. Since outbreaks have most often been correlated with poultry or unpasteurized dairy products, contact with farm animals, or contaminated water, historically, the majority of the studies have been with campylobacter isolates from poultry, domestic animals, and human patients. However, the bacterium has a broad host range that includes birds. These reservoirs need to be investigated, because the identification of the source and a determination of the transmission routes for a pathogen are important for the development of evidence-based disease control programs. In this study, two species of the human-commensal crow, from two different geographical regions separated by 7,000 miles of land and water, have been examined for their ability to cause disease by shedding campylobacters. Our results show that the crow may not play a significant role in campylobacteriosis, because the campylobacter organisms they shed produce a nonfunctional toxin.
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Abstract
Preharvest food safety research and activities have advanced over time with the recognition of the importance and complicated nature of the preharvest phase of food production. In developed nations, implementation of preharvest food safety procedures along with strict monitoring and containment at various postharvest stages such as slaughter, processing, storage, and distribution have remarkably reduced the burden of foodborne pathogens in humans. Early detection and adequate surveillance of pathogens at the preharvest stage is of the utmost importance to ensure a safe meat supply. There is an urgent need to develop rapid, cost-effective, and point-of-care diagnostics which could be used at the preharvest stage and would complement postmortem and other quality checks performed at the postharvest stage. With newer methods and technologies, more efforts need to be directed toward developing rapid, sensitive, and specific methods for detection or screening of foodborne pathogens at the preharvest stage. In this review, we will discuss the molecular methods available for detection and molecular typing of bacterial foodborne pathogens at the farm. Such methods include conventional techniques such as endpoint PCR, real-time PCR, DNA microarray, and more advanced techniques such as matrix-assisted layer desorption ionization-time of flight mass spectrometry and whole-genome sequencing.
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Jones AK, Rigby D, Burton M, Millman C, Williams NJ, Jones TR, Wigley P, O'Brien SJ, Cross P. Restaurant Cooking Trends and Increased Risk for Campylobacter Infection. Emerg Infect Dis 2018; 22:1208-15. [PMID: 27314748 PMCID: PMC4918174 DOI: 10.3201/eid2207.151775] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Perceived consumer preferences for rare chicken liver are increasing risk for campylobacteriosis. In the United Kingdom, outbreaks of Campylobacter infection are increasingly attributed to undercooked chicken livers, yet many recipes, including those of top chefs, advocate short cooking times and serving livers pink. During 2015, we studied preferences of chefs and the public in the United Kingdom and investigated the link between liver rareness and survival of Campylobacter. We used photographs to assess chefs’ ability to identify chicken livers meeting safe cooking guidelines. To investigate the microbiological safety of livers chefs preferred to serve, we modeled Campylobacter survival in infected chicken livers cooked to various temperatures. Most chefs correctly identified safely cooked livers but overestimated the public’s preference for rareness and thus preferred to serve them more rare. We estimated that 19%–52% of livers served commercially in the United Kingdom fail to reach 70°C and that predicted Campylobacter survival rates are 48%–98%. These findings indicate that cooking trends are linked to increasing Campylobacter infections.
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Lopes GV, Landgraf M, Destro MT. Occurrence of Campylobacter
in raw chicken and beef from retail outlets in São Paulo, Brazil. J Food Saf 2018. [DOI: 10.1111/jfs.12442] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Graciela Volz Lopes
- Laboratory of Food Microbiology, Department of Science and Food Technology, Faculty of Agronomy; Federal University of Pelotas, Campus Capão do Leão; Pelotas RS 96010-900 Brazil
| | - Mariza Landgraf
- Department of Food and Experimental Nutrition, Faculty of Pharmaceutical Sciences; University of São Paulo, Av. Professor Lineu Prestes 580; São Paulo SP 05058-000 Brazil
| | - Maria Teresa Destro
- Department of Food and Experimental Nutrition, Faculty of Pharmaceutical Sciences; University of São Paulo, Av. Professor Lineu Prestes 580; São Paulo SP 05058-000 Brazil
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Monteiro MA, Noll A, Laird RM, Pequegnat B, Ma Z, Bertolo L, DePass C, Omari E, Gabryelski P, Redkyna O, Jiao Y, Borrelli S, Poly F, Guerry P. Campylobacter jejuniCapsule Polysaccharide Conjugate Vaccine. CARBOHYDRATE-BASED VACCINES: FROM CONCEPT TO CLINIC 2018. [DOI: 10.1021/bk-2018-1290.ch011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mario A. Monteiro
- Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Alexander Noll
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland 20910, United States
| | - Renee M. Laird
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland 20910, United States
| | - Brittany Pequegnat
- Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Zuchao Ma
- Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Lisa Bertolo
- Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Christina DePass
- Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Eman Omari
- Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Pawel Gabryelski
- Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Olena Redkyna
- Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Yuening Jiao
- Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Silvia Borrelli
- Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Frederic Poly
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland 20910, United States
| | - Patricia Guerry
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland 20910, United States
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Sainato R, ElGendy A, Poly F, Kuroiwa J, Guerry P, Riddle MS, Porter CK. Epidemiology of Campylobacter Infections among Children in Egypt. Am J Trop Med Hyg 2017; 98:581-585. [PMID: 29260646 DOI: 10.4269/ajtmh.17-0469] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Campylobacter is a frequently isolated bacterial pathogen among children with diarrhea. Data are lacking on the distribution and spectrum of disease associated with Campylobacter species and Campylobacter jejuni capsular polysaccharide (CPS) types. This information is essential because current vaccine research seeks to target specific CPS types. An effective CPS-conjugate vaccine will need to cover CPS types that are both common and associated with severe disease. The US Naval Medical Research Unit-3 conducted several prospective cohort studies researching diarrheal disease in Egypt from 1995 to 2003. In total, 1,057 children were enrolled and followed to a maximum age of 36 months. We analyzed Campylobacter-positive stool samples that were collected while subjects were symptomatic, along with corresponding clinical data. Of 441 Campylobacter isolates, 322 represented primary infections (189 C. jejuni, 127 Campylobacter coli, six unspeciated). There were 19 C. jejuni CPS types identified; eight accounted for 63.5% of primary C. jejuni infections. We also screened for the presence of the type-6 secretion system (T6SS), a putative virulence determinant. The T6SS was found in 18.0% of C. coli isolates and 57.6% of C. jejuni isolates (P < 0.001), and was not uniformly distributed among CPS types (P < 0.001). Strains with the T6SS were not associated with more severe disease. Clinical presentations across species and CPS types appeared similar. This study adds to the growing epidemiological data and also provides some analysis of the clinical spectrum associated with infection by specific Campylobacter species, C. jejuni capsule types, and possible virulence determinants.
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Affiliation(s)
- Rebecca Sainato
- Department of Pediatrics, Walter Reed National Military Medical Center, Bethesda, Maryland
| | - Atef ElGendy
- United States Naval Medical Research Unit-3, Cairo, Egypt
| | - Frédéric Poly
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - Janelle Kuroiwa
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - Patricia Guerry
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - Mark S Riddle
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
| | - Chad K Porter
- Enteric Diseases Department, Naval Medical Research Center, Silver Spring, Maryland
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Moré E, Ayats T, Ryan PG, Naicker PR, Keddy KH, Gaglio D, Witteveen M, Cerdà-Cuéllar M. Seabirds (Laridae) as a source of Campylobacter spp., Salmonella spp. and antimicrobial resistance in South Africa. Environ Microbiol 2017; 19:4164-4176. [PMID: 28752962 DOI: 10.1111/1462-2920.13874] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2017] [Accepted: 07/24/2017] [Indexed: 11/28/2022]
Abstract
Zoonotic thermophilic Campylobacter and nontyphoidal Salmonella enterica are a major cause of foodborne human gastroenteritis worldwide. There is little information about reservoirs of these zoonotic agents in Africa. Thus, chicks of kelp gulls (Larus dominicanus, n = 129) and greater crested terns (Thalasseus bergii, n = 100) were studied at five colonies on the Western Cape coast (South Africa) during summer 2013/2014. Campylobacter spp. occurrence was 14.0% (CI95% : 9.9-19.3), with C. jejuni the most frequently isolated species, whilst that of Salmonella was 27.5% (CI95% : 21.9-33.9) overall, with a higher prevalence in gulls (43.0%, CI95% : 34.8-52.4) than terns (7.0%, CI95% : 3.1-14.4). Among the 16 different S. enterica serovars found, Anatum, Enteritidis and Hadar were the most frequent. The same or highly similar pulsed-field gel electrophoresis genotype was found in some Salmonella isolates from seabirds and humans presenting with salmonellosis in Cape Town hospitals. Both Campylobacter and Salmonella isolates exhibited antimicrobial resistance to several agents, including critically important antimicrobials (quinolones, tetracyclines and β-lactams) and multidrug resistance in Salmonella serovars from kelp gulls. Our results highlight the importance of seabirds as reservoirs of Campylobacter and Salmonella resistant strains and their role in the maintenance and transmission of these bacteria in the environment, with implications for public health.
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Affiliation(s)
- Elisabet Moré
- Centre de Recerca en Sanitat Animal (CReSA), IRTA, Campus Universitat Autònoma de Barcelona, Bellaterra 08193, Barcelona, Spain
| | - Teresa Ayats
- Centre de Recerca en Sanitat Animal (CReSA), IRTA, Campus Universitat Autònoma de Barcelona, Bellaterra 08193, Barcelona, Spain
| | - Peter G Ryan
- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, Rondebosch 7701, South Africa
| | - Preneshni R Naicker
- Division of Medical Microbiology, University of Cape Town, National Health Laboratory Service (NHLS) Groote Schuur Hospital, Cape Town 7925, South Africa
| | - Karen H Keddy
- National Institute for Communicable Diseases and Faculty of Health Sciences, University of the Witwatersrand, Centre for Enteric Diseases (CED), Johannesburg 2131, South Africa
| | - Davide Gaglio
- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, Rondebosch 7701, South Africa
| | - Minke Witteveen
- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, Rondebosch 7701, South Africa
| | - Marta Cerdà-Cuéllar
- Centre de Recerca en Sanitat Animal (CReSA), IRTA, Campus Universitat Autònoma de Barcelona, Bellaterra 08193, Barcelona, Spain
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50
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Jones NR, Millman C, van der Es M, Hukelova M, Forbes KJ, Glover C, Haldenby S, Hunter PR, Jackson K, O'Brien SJ, Rigby D, Strachan NJC, Williams N, Lake IR. Novel Sampling Method for Assessing Human-Pathogen Interactions in the Natural Environment Using Boot Socks and Citizen Scientists, with Application to Campylobacter Seasonality. Appl Environ Microbiol 2017; 83:e00162-17. [PMID: 28500040 PMCID: PMC5494624 DOI: 10.1128/aem.00162-17] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 04/06/2017] [Indexed: 01/08/2023] Open
Abstract
This paper introduces a novel method for sampling pathogens in natural environments. It uses fabric boot socks worn over walkers' shoes to allow the collection of composite samples over large areas. Wide-area sampling is better suited to studies focusing on human exposure to pathogens (e.g., recreational walking). This sampling method is implemented using a citizen science approach: groups of three walkers wearing boot socks undertook one of six routes, 40 times over 16 months in the North West (NW) and East Anglian (EA) regions of England. To validate this methodology, we report the successful implementation of this citizen science approach, the observation that Campylobacter bacteria were detected on 47% of boot socks, and the observation that multiple boot socks from individual walks produced consistent results. The findings indicate higher Campylobacter levels in the livestock-dominated NW than in EA (55.8% versus 38.6%). Seasonal differences in the presence of Campylobacter bacteria were found between the regions, with indications of winter peaks in both regions but a spring peak in the NW. The presence of Campylobacter bacteria on boot socks was negatively associated with ambient temperature (P = 0.011) and positively associated with precipitation (P < 0.001), results consistent with our understanding of Campylobacter survival and the probability of material adhering to boot socks. Campylobacter jejuni was the predominant species found; Campylobacter coli was largely restricted to the livestock-dominated NW. Source attribution analysis indicated that the potential source of C. jejuni was predominantly sheep in the NW and wild birds in EA but did not differ between peak and nonpeak periods of human incidence.IMPORTANCE There is debate in the literature on the pathways through which pathogens are transferred from the environment to humans. We report on the success of a novel method for sampling human-pathogen interactions using boot socks and citizen science techniques, which enable us to sample human-pathogen interactions that may occur through visits to natural environments. This contrasts with traditional environmental sampling, which is based on spot sampling techniques and does not sample human-pathogen interactions. Our methods are of practical value to scientists trying to understand the transmission of pathogens from the environment to people. Our findings provide insight into the risk of Campylobacter exposure from recreational visits and an understanding of seasonal differences in risk and the factors behind these patterns. We highlight the Campylobacter species predominantly encountered and the potential sources of C. jejuni.
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Affiliation(s)
- Natalia R Jones
- School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom
| | - Caroline Millman
- Department of Economics, School of Social Sciences, University of Manchester, Manchester, United Kingdom
| | - Mike van der Es
- Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - Miroslava Hukelova
- Department of Economics, School of Social Sciences, University of Manchester, Manchester, United Kingdom
| | - Ken J Forbes
- School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Aberdeen, United Kingdom
| | - Catherine Glover
- Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
| | - Sam Haldenby
- Centre for Genomic Research, University of Liverpool, Liverpool, United Kingdom
| | - Paul R Hunter
- Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - Kathryn Jackson
- Centre for Genomic Research, University of Liverpool, Liverpool, United Kingdom
| | - Sarah J O'Brien
- Institute of Psychology, Health & Society, University of Liverpool, Liverpool, United Kingdom
| | - Dan Rigby
- Department of Economics, School of Social Sciences, University of Manchester, Manchester, United Kingdom
| | - Norval J C Strachan
- School of Natural and Computing Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Nicola Williams
- Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
| | - Iain R Lake
- School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom
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