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Flores-Villaseñor H, Velázquez-Román J, León-Sicairos N, Angulo-Zamudio UA, Lira-Morales C, Martínez-García JJ, Acosta-Smith E, Valdés-Flores J, Tapia-Pastrana G, Canizalez-Román A. Serodiversity, antibiotic resistance, and virulence genes of Vibrio parahaemolyticus in oysters collected in coastal areas of northwestern Mexico between 2012 and 2020. Food Microbiol 2024; 123:104567. [PMID: 39038901 DOI: 10.1016/j.fm.2024.104567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 05/23/2024] [Accepted: 05/24/2024] [Indexed: 07/24/2024]
Abstract
This study aimed to determine the prevalence of V. parahaemolyticus in oysters from the northwestern coast of Mexico and to identify the serotypes, virulence factors, and antibiotic resistance of the strains. Oyster samples were collected from 2012 to 2020 from the northwest coast of Mexico; biochemical and molecular methods were used to identify V. parahaemolyticus from oysters; antiserum reaction to determine V. parahaemolyticus serotypes, and PCR assays were performed to identify pathogenic (tdh and/or trh) or pandemic (toxRS/new, and/or orf8) strains and antibiotic resistance testing. A total of 441 oyster samples were collected and tested for V. parahaemolyticus. Forty-seven percent of oyster samples were positive for V. parahaemolyticus. Ten different O serogroups and 72 serovars were identified, predominantly serotype O1:KUT with 22.2% and OUT:KUT with 17.3%. Twenty new serotypes that had not been previously reported in our region were identified. We detected 4.3% of pathogenic clones but no pandemic strains. About 73.5% of strains were resistant to at least one antibiotic, mainly ampicillin and ciprofloxacin; 25% were multi-drug resistant. In conclusion, the pathogenic strains in oysters and antibiotic resistance are of public health concern, as the potential for outbreaks throughout northwestern Mexico is well established.
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Affiliation(s)
- Hector Flores-Villaseñor
- School of Medicine, Autonomous University of Sinaloa, 80019, Culiacan, Sinaloa, Mexico; The Sinaloa State Public Health Laboratory, Secretariat of Health, 80058, Culiacan, Sinaloa, Mexico
| | - Jorge Velázquez-Román
- School of Medicine, Autonomous University of Sinaloa, 80019, Culiacan, Sinaloa, Mexico
| | - Nidia León-Sicairos
- School of Medicine, Autonomous University of Sinaloa, 80019, Culiacan, Sinaloa, Mexico; Pediatric Hospital of Sinaloa, 80200, Culiacan, Sinaloa, Mexico
| | | | - Carolina Lira-Morales
- School of Medicine, Autonomous University of Sinaloa, 80019, Culiacan, Sinaloa, Mexico
| | - Jesús J Martínez-García
- School of Medicine, Autonomous University of Sinaloa, 80019, Culiacan, Sinaloa, Mexico; Pediatric Hospital of Sinaloa, 80200, Culiacan, Sinaloa, Mexico
| | - Erika Acosta-Smith
- School of Medicine, Autonomous University of Sinaloa, 80019, Culiacan, Sinaloa, Mexico
| | - Jorge Valdés-Flores
- Programa Doctorado en Ciencias Biológicas, Facultad de Biología, Universidad Autónoma de Sinaloa, 80040, Culiacán, Sinaloa, Mexico
| | - Gabriela Tapia-Pastrana
- Laboratorio de Investigación Biomédica, Hospital Regional de Alta Especialidad de Oaxaca, IMSS-BIENESTAR, Oaxaca, 71256, Mexico
| | - Adrian Canizalez-Román
- School of Medicine, Autonomous University of Sinaloa, 80019, Culiacan, Sinaloa, Mexico; The Women's Hospital, Secretariat of Health, 80020, Culiacan, Sinaloa, Mexico.
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Ren H, Liu T, Hou H, Qi X, Fang L, Yang Y, Ma R. Risk Factors and Effects of Climate Lag on Vibrio Parahaemolyticus Infection in Eastern Coastal Cities of China: A Study Based on Hangzhou City. Foods 2024; 13:2116. [PMID: 38998622 PMCID: PMC11241442 DOI: 10.3390/foods13132116] [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: 05/21/2024] [Revised: 06/26/2024] [Accepted: 06/28/2024] [Indexed: 07/14/2024] Open
Abstract
Bacterial foodborne diseases caused by Vibrio parahaemolyticus pose persistent challenges to coastal cities in China. In this study, we employed multiple logistic regression analysis and distributed lag non-linear models (DLNM) to investigate the epidemiological characteristics and associated risk factors of vibriosis in the metropolitan area of Hangzhou from 2014 to 2018. Analysis of foodborne cases indicated that certain demographics and occupational factors, including age between 16 and 44 years; houseworkers or unemployed individuals; preference for aquatic and meat products; and dining in collective canteens or catering services contribute to an increased likelihood of V. parahaemolyticus infection. Moreover, a higher per capita GDP and exposure to high temperatures were identified as risk factors for vibriosis. This study highlights the significance of the daily mean temperature as a meteorological factor influencing V. parahaemolyticus infection, with varying lag effects observed depending on temperature conditions. At low temperatures, the risk of infection occurs after a lag of 21 days, whereas at high temperatures, the risk is highest on the same day, while the second infection risk period occurs after a lag of 21 days. These findings provide a spatiotemporal perspective of the risk analysis of foodborne diseases, with a daily timescale and street spatial scale, which contributes to the development of public health strategies and food safety protocols in coastal cities.
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Affiliation(s)
- Hangqi Ren
- Zhejiang Provincial Key Laboratory of Urban Wetlands and Regional Change, Hangzhou Normal University, Hangzhou 311121, China; (H.R.); (H.H.); (R.M.)
| | - Ting Liu
- Zhejiang Provincial Key Laboratory of Urban Wetlands and Regional Change, Hangzhou Normal University, Hangzhou 311121, China; (H.R.); (H.H.); (R.M.)
| | - Hao Hou
- Zhejiang Provincial Key Laboratory of Urban Wetlands and Regional Change, Hangzhou Normal University, Hangzhou 311121, China; (H.R.); (H.H.); (R.M.)
| | - Xiaojuan Qi
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China;
| | - Lei Fang
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China;
| | - Yinyi Yang
- Institute of Science, Technology and Society, South China Normal University, Guangzhou 510006, China;
| | - Rong Ma
- Zhejiang Provincial Key Laboratory of Urban Wetlands and Regional Change, Hangzhou Normal University, Hangzhou 311121, China; (H.R.); (H.H.); (R.M.)
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Recovery of Pasteurization-Resistant Vibrio parahaemolyticus from Seafoods Using a Modified, Two-Step Enrichment. Foods 2022; 11:foods11050764. [PMID: 35267397 PMCID: PMC8909376 DOI: 10.3390/foods11050764] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 03/01/2022] [Accepted: 03/04/2022] [Indexed: 12/28/2022] Open
Abstract
Persistent Vibrio-parahaemolyticus-associated vibriosis cases, attributed, in part, to the inefficient techniques for detecting viable-but-non-culturable (VBNC) Vibrio pathogens and the ingestion of undercooked seafood, is the leading cause of bacterial seafood-borne outbreaks, hospitalizations, and deaths in the United States. The effect of extreme heat processing on Vibrio biology and its potential food safety implication has been underexplored. In the present work, environmental samples from the wet market, lagoon, and estuarine environments were analyzed for V. parahaemolyticus recovery using a modified, temperature-dependent, two-step enrichment method followed by culture-based isolation, phenotype, and genotype characterizations. The work recovered novel strains (30% of 12 isolates) of V. parahaemolyticus from prolonged-heat-processing conditions (80 °C, 20 min), as confirmed by 16S rDNA bacterial identification. Select strains, VHT1 and VHT2, were determined to be hemolysis- and urease-positive pathogens. PCR analyses of chromosomal DNA implicated the tdh-independent, tlh-associated hemolysis in these strains. Both strains exhibited significant, diverse antibiotic profiles (p < 0.05). Turbidimetric and viable count assays revealed the pasteurization-resistant V. parahaemolyticus VHT1/VHT2 (62 °C, 8 h). These findings disclose the efficiency of Vibrio extremist recovery by the modified, two-step enrichment technique and improve knowledge of Vibrio biology essential to food safety reformation.
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Ali S, Hossain M, Azad AB, Siddique AB, Moniruzzaman M, Ahmed MA, Amin MB, Islam MS, Rahman MM, Mondal D, Mahmud ZH. Diversity of Vibrio parahaemolyticus in marine fishes of Bangladesh. J Appl Microbiol 2021; 131:2539-2551. [PMID: 33788359 DOI: 10.1111/jam.15093] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 03/04/2021] [Accepted: 03/26/2021] [Indexed: 11/29/2022]
Abstract
AIMS To determine the occurrence, diversity, antibiotic resistance and biofilm formation of Vibrio parahaemolyticus isolated from marine fishes in Bangladesh. METHODS AND RESULTS A total of 80 marine fishes were obtained from the local markets and examined for the presence of V. parahaemolyticus. All the isolated V. parahaemolyticus were characterized for the presence of virulence markers, thermostable direct hemolysin (TDH) or thermostable direct hemolysin related hemolysin (TRH). Isolates were serotyped and further characterized by enterobacterial repetitive intergenic consensus sequence PCR (ERIC-PCR) typing to analyse the genetic diversity. Moreover, biofilm formation and antibiotic resistance patterns were also determined. About 63·75% (51/80) of the tested marine fishes were contaminated with V. parahaemolyticus. From the contaminated fishes, 71 representatives V. parahaemolyticus were isolated and none of them harboured tdh and trh virulence genes. Nine different O-groups and seven different K-types were found by serological analysis and the dominant serotype was O5:KUT. In ERIC-PCR analysis, eight clusters (A-H) were found and the most common pattern was A (46·5%). All of the isolates were resistant to ampicillin and 78·9% of isolates were resistant to streptomycin. The highest biofilm formation was found at 37°C compared to 25°C and 4°C. CONCLUSION Diverse V. parahaemolyticus are present in marine fishes in the local market of Bangladesh with antibiotic-resistant properties and biofilm formation capacity. SIGNIFICANCE AND IMPACT OF THE STUDY The widespread prevalence of diverse V. parahaemolyticus in marine fishes is an issue of serious concern, and it entails careful monitoring to ascertain the safety of seafood consumers.
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Affiliation(s)
- S Ali
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - M Hossain
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - A B Azad
- Department of Botany, University of Dhaka, Dhaka, Bangladesh
| | - A B Siddique
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - M Moniruzzaman
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - M A Ahmed
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - M B Amin
- Laboratory of Food Safety and One Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - M S Islam
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - M M Rahman
- Department of Microbiology, University of Dhaka, Dhaka, Bangladesh
| | - D Mondal
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh.,Laboratory of Food Safety and One Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Z H Mahmud
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
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Santos LDO, de Lanna CA, Arcanjo ACDC, Bisch PM, von Krüger WMA. Genotypic Diversity and Pathogenic Potential of Clinical and Environmental Vibrio parahaemolyticus Isolates From Brazil. Front Microbiol 2021; 12:602653. [PMID: 33776949 PMCID: PMC7994283 DOI: 10.3389/fmicb.2021.602653] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 02/10/2021] [Indexed: 11/25/2022] Open
Abstract
Vibrio parahaemolyticus strains recovered from human diarrheal stools (one in 1975 and two in 2001) and environmental sources (four, between 2008 and 2010) were investigated for the presence of virulence genes (trh, tdh, and vpadF), pandemic markers (orf8, toxRSnew), and with respect to their pathogenic potential in two systemic infection models. Based only on the presence or absence of these genetic markers, they were classified as follows: the environmental strains were non-pathogenic, whereas among the clinical strains, the one isolated in 1975 was pathogenic (non-pandemic), and the other two were pathogenic (pandemic). The pathogenic potential of the strains was evaluated in mice and Galleria mellonella larvae infection models, and except for the clinical (pathogenic, non-pandemic) isolate, the others produced lethal infection in both organisms, regardless of their source, serotype, and genotype (tdh, orf8, toxRSnew, and vpadF). Based on mice and larval mortality rates, the strains were then grouped according to virulence (high, intermediate, and avirulent), and remarkably similar results were obtained by using these models: The clinical strain (pathogenic and non-pandemic) was classified as avirulent, and other strains (four non-pathogenic and two pandemic) were considered of high or intermediate virulence. In summary, these findings demonstrate that G. mellonella larvae can indeed be used as an alternative model to study the pathogenicity of V. parahaemolyticus. Moreover, they raise doubts about the use of traditional virulence markers to predict pathogenesis of the species and show that reliable models are indispensable to determine the pathogenic potential of environmental isolates considered non-pathogenic, based on the absence of the long-standing virulence indicators.
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Affiliation(s)
- Leandro de O Santos
- Laboratório de Física Biológica, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Cristóvão A de Lanna
- Laboratório de Física Biológica, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Anna Carolina da C Arcanjo
- Laboratório de Física Biológica, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Paulo M Bisch
- Laboratório de Física Biológica, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Wanda M A von Krüger
- Laboratório de Física Biológica, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Siddique AB, Moniruzzaman M, Ali S, Dewan MN, Islam MR, Islam MS, Amin MB, Mondal D, Parvez AK, Mahmud ZH. Characterization of Pathogenic Vibrio parahaemolyticus Isolated From Fish Aquaculture of the Southwest Coastal Area of Bangladesh. Front Microbiol 2021; 12:635539. [PMID: 33763050 PMCID: PMC7982743 DOI: 10.3389/fmicb.2021.635539] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 01/27/2021] [Indexed: 12/28/2022] Open
Abstract
Vibrio parahaemolyticus is a major foodborne pathogen responsible for significant economic losses in aquaculture and a threat to human health. Here, we explored the incidence, virulence potential, and diversity of V. parahaemolyticus isolates from aquaculture farms in Bangladesh. We examined a total of 216 water, sediment, Oreochromis niloticus (tilapia), Labeo rohita (rui), and Penaeus monodon (shrimp) samples from the aquaculture system where 60.2% (130/216) samples were positive for V. parahaemolyticus. Furthermore, we identified 323 V. parahaemolyticus strains from contaminated samples, 17 of which were found positive for trh, a virulence gene. Four isolates out of the 17 obtained were able to accumulate fluid in the rabbit ileal loop assay. The correlation between the contamination of V. parahaemolyticus and environmental factors was determined by Pearson correlation. The temperature and salinity were significantly correlated (positive) with the incidence of V. parahaemolyticus. Most of the pathogenic isolates (94.1%) were found resistant to ampicillin and amoxicillin. O8: KUT was the predominant serotype of the potentially pathogenic isolates. ERIC-PCR reveals genetic variation and relatedness among the pathogenic isolates. Therefore, this region-specific study establishes the incidence of potential infection with V. parahaemolyticus from the consumption of tilapia, rui, and shrimp raised in farms in Satkhira, Bangladesh, and the basis for developing strategies to reduce the risk for diseases and economic burden.
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Affiliation(s)
- Abu Baker Siddique
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh.,Department of Microbiology, Jahangirnagar University, Dhaka, Bangladesh
| | - M Moniruzzaman
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Sobur Ali
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Md Nayem Dewan
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Mohammad Rafiqul Islam
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Md Shafiqul Islam
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Mohammed Badrul Amin
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Dinesh Mondal
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | | | - Zahid Hayat Mahmud
- Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
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Bonny SQ, Hossain MAM, Uddin SMK, Pulingam T, Sagadevan S, Johan MR. Current trends in polymerase chain reaction based detection of three major human pathogenic vibrios. Crit Rev Food Sci Nutr 2020; 62:1317-1335. [DOI: 10.1080/10408398.2020.1841728] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sharmin Quazi Bonny
- Nanotechnology and Catalysis Research Centre, Institute of Advanced Studies, University of Malaya, Kuala Lumpur, Malaysia
| | - M. A. Motalib Hossain
- Nanotechnology and Catalysis Research Centre, Institute of Advanced Studies, University of Malaya, Kuala Lumpur, Malaysia
| | - Syed Muhammad Kamal Uddin
- Nanotechnology and Catalysis Research Centre, Institute of Advanced Studies, University of Malaya, Kuala Lumpur, Malaysia
| | - Thiruchelvi Pulingam
- Nanotechnology and Catalysis Research Centre, Institute of Advanced Studies, University of Malaya, Kuala Lumpur, Malaysia
| | - Suresh Sagadevan
- Nanotechnology and Catalysis Research Centre, Institute of Advanced Studies, University of Malaya, Kuala Lumpur, Malaysia
| | - Mohd Rafie Johan
- Nanotechnology and Catalysis Research Centre, Institute of Advanced Studies, University of Malaya, Kuala Lumpur, Malaysia
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8
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Di DYW, Shin H, Han D, Unno T, Hur HG. High genetic diversity of Vibrio parahaemolyticus isolated from tidal water and mud of southern coast of South Korea. FEMS Microbiol Ecol 2020; 95:5308828. [PMID: 30753635 DOI: 10.1093/femsec/fiz022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 02/06/2019] [Indexed: 12/30/2022] Open
Abstract
A horizontal, fluorophore-enhanced, repetitive extragenic palindromic-polymerase chain reaction (rep-PCR) DNA fingerprinting technique was adapted to examine the genotypic richness and source differentiation of Vibrio parahaemolyticus (n = 1749) isolated from tidal water and mud of southern coast of South Korea. The number of unique genotypes observed from June (163, 51.9%), September (307, 63.9%), December (205, 73.8%) and February (136, 74.7%), indicating a high degree of genetic diversity. Contrary, lower genetic diversity was detected in April (99, 46.8%), including predominant genotypes comprised >30 V. parahaemolyticus isolates. Jackknife analysis indicated that 65.1% tidal water isolates and 87.1% mud isolates were correctly assigned to their source groups. Sixty-nine isolates of pathogenic V. parahaemolyticus were clustered into two groups, separated by sampling month, source of isolation and serogroups. Serotypes O1, O4, O5, O10/O12 and O11 were the dominant serovariants, while serotypes O3/O13 were highly detected in April where there were no pathogenic V. parahaemolyticus isolates. Most of the V. parahaemolyticus isolates were resistant to ampicillin, ceftazidime and sulfamethoxazole. Interestingly, four V. parahaemolyticus isolates resistant to carbepenem did not contain the known carbapenemase-encoding gene, but possess an extended-spectrum β-lactamase blaTEM.
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Affiliation(s)
- Doris Y W Di
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Oryong-dong, Buk-gu, 61005 Gwangju, South Korea
| | - Hansub Shin
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Oryong-dong, Buk-gu, 61005 Gwangju, South Korea
| | - Dukki Han
- Faculty of Biotechnology, College of Applied Life Science, SARI, Jeju National University, 102 Jejudaehakno, Jeju-si, 690-756 Jeju, South Korea
| | - Tatsuya Unno
- Faculty of Biotechnology, College of Applied Life Science, SARI, Jeju National University, 102 Jejudaehakno, Jeju-si, 690-756 Jeju, South Korea
| | - Hor-Gil Hur
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Oryong-dong, Buk-gu, 61005 Gwangju, South Korea
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9
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Jesser KJ, Valdivia-Granda W, Jones JL, Noble RT. Clustering of Vibrio parahaemolyticus Isolates Using MLST and Whole-Genome Phylogenetics and Protein Motif Fingerprinting. Front Public Health 2019; 7:66. [PMID: 31139608 PMCID: PMC6519141 DOI: 10.3389/fpubh.2019.00066] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 03/06/2019] [Indexed: 01/22/2023] Open
Abstract
Vibrio parahaemolyticus is a ubiquitous and abundant member of native microbial assemblages in coastal waters and shellfish. Though V. parahaemolyticus is predominantly environmental, some strains have infected human hosts and caused outbreaks of seafood-related gastroenteritis. In order to understand differences among clinical and environmental V. parahaemolyticus strains, we used high quality DNA sequencing data to compare the genomes of V. parahaemolyticus isolates (n = 43) from a variety of geographic locations and clinical and environmental sample matrices. We used phylogenetic trees inferred from multilocus sequence typing (MLST) and whole-genome (WG) alignments, as well as a novel classification and genome clustering approach that relies on protein motif fingerprints (MFs), to assess relationships between V. parahaemolyticus strains and identify novel molecular targets associated with virulence. Differences in strain clustering at more than one position were observed between the MLST and WG phylogenetic trees. The WG phylogeny had higher support values and strain resolution since isolates of the same sequence type could be differentiated. The MF analysis revealed groups of protein motifs that were associated with the pathogenic MLST type ST36 and a large group of clinical strains isolated from human stool. A subset of the stool and ST36-associated protein motifs were selected for further analysis and the motif sequences were found in genes with a variety of functions, including transposases, secretion system components and effectors, and hypothetical proteins. DNA sequences associated with these protein motifs are candidate targets for future molecular assays in order to improve surveys of pathogenic V. parahaemolyticus in the environment and seafood.
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Affiliation(s)
- Kelsey J Jesser
- Institute of Marine Sciences, University of North Carolina at Chapel Hill, Morehead City, NC, United States
| | | | - Jessica L Jones
- Gulf Coast Seafood Laboratory, Division of Seafood Science and Technology, U.S. Food and Drug Administration, Dauphin Island, AL, United States
| | - Rachel T Noble
- Institute of Marine Sciences, University of North Carolina at Chapel Hill, Morehead City, NC, United States
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Neogi SB, Lara R, Alam M, Harder J, Yamasaki S, Colwell RR. Environmental and hydroclimatic factors influencing Vibrio populations in the estuarine zone of the Bengal delta. ENVIRONMENTAL MONITORING AND ASSESSMENT 2018; 190:565. [PMID: 30178153 DOI: 10.1007/s10661-018-6925-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 08/14/2018] [Indexed: 06/08/2023]
Abstract
The objective of this study was to determine environmental parameters driving Vibrio populations in the estuarine zone of the Bengal delta. Spatio-temporal data were collected at river estuary, mangrove, beach, pond, and canal sites. Effects of salinity, tidal amplitude, and a cyclone and tsunami were included in the study. Vibrio population shifts were found to be correlated with tide-driven salinity and suspended particulate matter (SPM). Increased abundance of Vibrio spp. in surface water was observed after a cyclone, attributed to re-suspension of benthic particulate organic carbon (POC), and increased availability of chitin and dissolved organic carbon (DOC). Approximately a two log10 increase in the (p < 0.05) number of Vibrio spp. was observed in < 20 μm particulates, compared with microphytoplankton (20-60 μm) and zooplankton > 60 μm fractions. Benthic and suspended sediment comprised a major reservoir of Vibrio spp. Results of microcosm experiments showed enhanced growth of vibrios was related to concentration of organic matter in SPM. It is concluded that SPM, POC, chitin, and salinity significantly influence abundance and distribution of vibrios in the Bengal delta estuarine zone.
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Affiliation(s)
- Sucharit Basu Neogi
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka, 598-8531, Japan
- International Centre for Diarrhoeal Disease Research, Mohakhali, Dhaka, 1212, Bangladesh
| | - Rubén Lara
- Leibniz Center for Tropical Marine Ecology, Fahrenheitstr. 6, 28359, Bremen, Germany
- Argentine Institute of Oceanography, CONICET-UNS, Florida 4500, 8000, Bahía Blanca, Argentina
| | - Munirul Alam
- International Centre for Diarrhoeal Disease Research, Mohakhali, Dhaka, 1212, Bangladesh
| | - Jens Harder
- Max Planck Institute for Marine Microbiology, Celsius str. 1, 28359, Bremen, Germany
| | - Shinji Yamasaki
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka, 598-8531, Japan
| | - Rita R Colwell
- Maryland Pathogen Research Institute, University of Maryland, College Park, College Park, MD, 20742, USA.
- Center for Bioinformatics and Computational Biology, University of Maryland Institute for Advanced Computer Studies, University of Maryland, College Park, MD, 20742, USA.
- Johns Hopkins University Bloomberg School of Public Health|, Baltimore, MD, 21205, USA.
- CosmosID, Inc., 1600 East Gude Drive, Suite 210, Rockville, MD, 20850, USA.
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Vibrio parahaemolyticus and Vibrio vulnificus Recovered from Oysters during an Oyster Relay Study. Appl Environ Microbiol 2018; 84:AEM.01790-17. [PMID: 29150510 DOI: 10.1128/aem.01790-17] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 10/20/2017] [Indexed: 12/17/2022] Open
Abstract
Vibrio parahaemolyticus and Vibrio vulnificus are naturally occurring estuarine bacteria and are the leading causes of seafood-associated infections and mortality in the United States. Though multiple-antibiotic-resistant V. parahaemolyticus and V. vulnificus strains have been reported, resistance patterns in vibrios are not as well documented as those of other foodborne bacterial pathogens. Salinity relaying (SR) is a postharvest processing (PHP) treatment to reduce the abundances of these pathogens in shellfish harvested during the warmer months. The purpose of this study was to evaluate the antimicrobial susceptibility (AMS), pathogenicity, and genetic profiles of V. parahaemolyticus and V. vulnificus recovered from oysters during an oyster relay study. Isolates (V. parahaemolyticus [n = 296] and V. vulnificus [n = 94]) were recovered from oysters before and during the 21-day relaying study to detect virulence genes (tdh and trh) and genes correlated with virulence (vcgC) using multiplex quantitative PCR (qPCR). AMS to 20 different antibiotics was investigated using microbroth dilution, and pulsed-field gel electrophoresis (PFGE) was used to study the genetic profiles of the isolates. Twenty percent of V. vulnificus isolates were vcgC+, while 1 and 2% of V. parahaemolyticus were tdh+ and trh+, respectively. More than 77% of the V. vulnificus isolates and 30% of the V. parahaemolyticus isolates were resistant to at least one antimicrobial. Forty-eight percent of V. vulnificus and 8% of V. parahaemolyticus isolates were resistant to two or more antimicrobials. All isolates demonstrated a high genetic diversity, even among those isolated from the same site and having a similar AMS profile. No significant effects of the relaying process on AMS, virulence genes, or PFGE profiles of V. vulnificus and V. parahaemolyticus were observed.IMPORTANCE Analysis of the antibiotic resistance profiles of V. vulnificus and V. parahaemolyticus isolated from oysters during this study indicated that more than 48% of V. vulnificus isolates were resistant to two or more antimicrobials, including those recommended by the CDC for treating Vibrio infections. Also, the V. parahaemolyticus isolates showed high MICs for some of the Vibrio infection treatment antibiotics. Monitoring of AMS profiles of this bacterium is important to ensure optimal treatment of infections and improve food safety. Our study showed no significant differences in the AMS profiles of V. vulnificus (P = 0.26) and V. parahaemolyticus (P = 0.23) isolated from the oysters collected before versus after relaying. This suggests that the salinity of the relaying sites did not affect the AMS profiles of the Vibrio isolates, although it did reduce the numbers of these bacteria in oysters (S. Parveen et al., J Food Sci 82:484-491, 2017, https://doi.org/10.1111/1750-3841.13584).
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Chen AJ, Hasan NA, Haley BJ, Taviani E, Tarnowski M, Brohawn K, Johnson CN, Colwell RR, Huq A. Characterization of Pathogenic Vibrio parahaemolyticus from the Chesapeake Bay, Maryland. Front Microbiol 2017; 8:2460. [PMID: 29375492 PMCID: PMC5770735 DOI: 10.3389/fmicb.2017.02460] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 11/27/2017] [Indexed: 01/10/2023] Open
Abstract
Vibrio parahaemolyticus is the leading cause of bacterial gastroenteritis associated with seafood consumption in the United States. Here we investigated the presence of virulence factors and genetic diversity of V. parahaemolyticus isolated from water, oyster, and sediment samples from the Chesapeake Bay, Maryland. Of more than 2,350 presumptive Vibrio collected, more than half were confirmed through PCR as V. parahaemolyticus, with 10 encoding both tdh and trh and 6 encoding only trh. Potentially pathogenic V. parahaemolyticus were then serotyped with O1:KUT and O3:KUT predominant. Furthermore, pulsed-field gel electrophoresis was performed and the constructed dendrogram displayed high diversity, as did results from multiple-locus VNTR analysis. Vibrio parahaemolyticus was readily isolated from Chesapeake Bay waters but was less frequently isolated from oyster and sediment samples collected during this study. Potentially pathogenic V. parahaemolyticus was isolated in fewer numbers and the isolates displayed expansive diversity. Although characteristics of the pathogenic V. parahaemolyticus were highly variable and the percent of pathogenic V. parahaemolyticus detected was low, it is important to note that, pathogenic V. parahaemolyticus are present in the Chesapeake Bay, warranting seafood monitoring to minimize risk of disease for the public, and to reduce the economic burden of V. parahaemolyticus related illness.
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Affiliation(s)
- Arlene J Chen
- Department of Cell Biology and Molecular Genetics, Maryland Pathogen Research Institute, University of Maryland, College Park, College Park, MD, United States
| | - Nur A Hasan
- Department of Cell Biology and Molecular Genetics, Maryland Pathogen Research Institute, University of Maryland, College Park, College Park, MD, United States.,CosmosID Inc., College Park, MD, United States
| | - Bradd J Haley
- Department of Cell Biology and Molecular Genetics, Maryland Pathogen Research Institute, University of Maryland, College Park, College Park, MD, United States
| | - Elisa Taviani
- Department of Cell Biology and Molecular Genetics, Maryland Pathogen Research Institute, University of Maryland, College Park, College Park, MD, United States
| | - Mitch Tarnowski
- Maryland Department of Natural Resources, Annapolis, MD, United States
| | - Kathy Brohawn
- Maryland Department of the Environment, Baltimore, MD, United States
| | - Crystal N Johnson
- Department of Environmental Science, Louisiana State University, Baton Rouge, LA, United States
| | - Rita R Colwell
- Department of Cell Biology and Molecular Genetics, Maryland Pathogen Research Institute, University of Maryland, College Park, College Park, MD, United States.,CosmosID Inc., College Park, MD, United States.,Maryland Institute for Applied Environmental Health, University of Maryland, College Park, College Park, MD, United States.,Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States.,Center for Bioinformatics and Computational Biology, University of Maryland, College Park, College Park, MD, United States
| | - Anwar Huq
- Department of Cell Biology and Molecular Genetics, Maryland Pathogen Research Institute, University of Maryland, College Park, College Park, MD, United States.,Maryland Institute for Applied Environmental Health, University of Maryland, College Park, College Park, MD, United States
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Obaidat MM, Salman AEB, Roess AA. Virulence and Antibiotic Resistance of Vibrio parahaemolyticus Isolates from Seafood from Three Developing Countries and of Worldwide Environmental, Seafood, and Clinical Isolates from 2000 to 2017. J Food Prot 2017; 80:2060-2067. [PMID: 29154715 DOI: 10.4315/0362-028x.jfp-17-156] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Vibrio parahaemolyticus is a leading cause of seafood-associated illness. This study investigated the prevalence, virulence, and antibiotic resistance of V. parahaemolyticus in three low- and middle-income countries. Freshly caught fish samples (n = 330) imported to Jordan from Yemen, India, and Egypt were tested. The overall prevalence of V. parahaemolyticus was 15% (95% confidence interval: 11 to 19%). Three isolates (6%) were positive for the thermostable direct hemolysin-related (trh) gene, and all isolates was negative for the thermostable direct hemolysin (tdh) gene. All isolates were resistant to colistin sulfate, neomycin, and kanamycin, and 51 and 43% of isolates were resistant to tetracycline and ampicillin, respectively. Only 4% of the isolates were resistant to cefotaxime and chloramphenicol, and no isolates were resistant to sulfamethoxazole-trimethoprim, streptomycin, gentamicin, ciprofloxacin, and nalidixic acid. All isolates were resistant to two classes of antibiotics, and 86% were multidrug resistant (resistant to at least one drug in three or more classes of antibiotics). A literature review of clinical, seafood, and environmental V. parahaemolyticus isolates worldwide revealed high rates of gentamicin and ampicillin resistance, emerging resistance to third-generation cephalosporins, and limited resistance to sulfamethoxazole-trimethoprim, ciprofloxacin, nalidixic acid, and chloramphenicol. Thus, last-resort antibiotics could be ineffective for treating V. parahaemolyticus infections. Several global reports also documented illness outbreaks in humans caused by trh- and tdh-negative V. parahaemolyticus strains. More research is needed to determine whether the presence of these genes is sufficient to classify the strains as virulent.
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Affiliation(s)
- Mohammad M Obaidat
- 1 Department of Veterinary Pathology and Public Health, Faculty of Veterinary Medicine, Jordan University of Science and Technology, Irbid, Jordan 22110; and
| | - Alaa E Bani Salman
- 1 Department of Veterinary Pathology and Public Health, Faculty of Veterinary Medicine, Jordan University of Science and Technology, Irbid, Jordan 22110; and
| | - Amira A Roess
- 2 Department of Global Health, George Washington University, Washington, D.C. 20052, USA
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Vibrio Pathogens: A Public Health Concern in Rural Water Resources in Sub-Saharan Africa. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14101188. [PMID: 28991153 PMCID: PMC5664689 DOI: 10.3390/ijerph14101188] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Revised: 09/29/2017] [Accepted: 10/04/2017] [Indexed: 12/12/2022]
Abstract
Members of the Vibrio genus are autochthonous inhabitants of aquatic environments and play vital roles in sustaining the aquatic milieu. The genus comprises about 100 species, which are mostly of marine or freshwater origin, and their classification is frequently updated due to the continuous discovery of novel species. The main route of transmission of Vibrio pathogens to man is through drinking of contaminated water and consumption inadequately cooked aquatic food products. In sub-Saharan Africa and much of the developing world, some rural dwellers use freshwater resources such as rivers for domestic activities, bathing, and cultural and religious purposes. This review describes the impact of inadequately treated sewage effluents on the receiving freshwater resources and the associated risk to the rural dwellers that depends on the water. Vibrio infections remain a threat to public health. In the last decade, Vibrio disease outbreaks have created alertness on the personal, economic, and public health uncertainties associated with the impact of contaminated water in the aquatic environment of sub-Saharan Africa. In this review, we carried out an overview of Vibrio pathogens in rural water resources in Sub-Saharan Africa and the implication of Vibrio pathogens on public health. Continuous monitoring of Vibrio pathogens among environmental freshwater and treated effluents is expected to help reduce the risk associated with the early detection of sources of infection, and also aid our understanding of the natural ecology and evolution of Vibrio pathogens.
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Lu X, Zhou H, Du X, Liu S, Xu J, Cui Z, Pang B, Kan B. Population analysis of clinical and environmental Vibrio parahaemolyticus isolated from eastern provinces in China by removing the recombinant SNPs in the MLST loci. INFECTION GENETICS AND EVOLUTION 2016; 45:303-310. [PMID: 27608607 DOI: 10.1016/j.meegid.2016.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 08/20/2016] [Accepted: 09/02/2016] [Indexed: 01/22/2023]
Abstract
Vibrio parahaemolyticus is a common seafood-borne pathogenic bacterium which causes gastroenteritis in humans. Continuous surveillance on the molecular characters of the clinical and environmental V. parahaemolyticus strains needs to be conducted for the epidemiological and genetic purposes. To generate a picture of the population distribution of V. parahaemolyticus in eastern China isolated from clinical cases of gastroenteritis and environmental samples, we investigated the genetic and evolutionary relationships of the strains using the commonly used multi-locus sequence typing (MLST, in which seven house-keeping genes are used in the protocol). A highly genetic diversity within the V. parahaemolyticus population was observed but ST3 was still dominant in the clinical strains, and 103 new sequence types (ST) were found in the clinical strains by searching in the global V. parahaemolyticus MLST database. With these genetically diverse strains, we estimated the recombination rates of the loci in MLST analysis. The locus recA was found to be subject to exceptionally high rate of recombination, and the recombinant single nucleotide polymorphisms (SNPs) were also identified within the seven loci. The phylogenetic tree of the strains was re-constructed using the maximum likelihood method by removing the recombination SNPs of the seven loci, and the minimum spanning tree was re-constructed with the six loci without recA. Some changes were observed in comparison with the previously used methods, suggesting that the homologous recombination has roles in shaping the clonal structure of V. parahaemolyticus. We propose the recombination-free SNPs strategy in the clonality analysis of V. parahaemolyticus, especially when using the maximum likelihood method.
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Affiliation(s)
- Xin Lu
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou 310003, China
| | - Haijian Zhou
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou 310003, China
| | - Xiaoli Du
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou 310003, China
| | - Sha Liu
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou 310003, China
| | - Jialiang Xu
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Zhigang Cui
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou 310003, China
| | - Bo Pang
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou 310003, China.
| | - Biao Kan
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou 310003, China.
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16
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Li J, Xue F, Yang Z, Zhang X, Zeng D, Chao G, Jiang Y, Li B. Vibrio parahaemolyticus Strains of Pandemic Serotypes Identified from Clinical and Environmental Samples from Jiangsu, China. Front Microbiol 2016; 7:787. [PMID: 27303379 PMCID: PMC4885827 DOI: 10.3389/fmicb.2016.00787] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 05/09/2016] [Indexed: 01/22/2023] Open
Abstract
Vibrio parahaemolyticus has emerged as a major foodborne pathogen in China, Japan, Thailand, and other Asian countries. In this study, 72 strains of V. parahaemolyticus were isolated from clinical and environmental samples between 2006 and 2014 in Jiangsu, China. The serotypes and six virulence genes including thermostable direct hemolysin (TDR) and TDR-related hemolysin (TRH) genes were assessed among the isolates. Twenty five serotypes were identified and O3:K6 was one of the dominant serotypes. The genetic diversity was assessed by multilocus sequence typing (MLST) analysis, and 48 sequence types (STs) were found, suggesting this V. parahaemolyticus group is widely dispersed and undergoing rapid evolution. A total of 25 strains of pandemic serotypes such as O3:K6, O5:K17, and O1:KUT were identified. It is worth noting that the pandemic serotypes were not exclusively identified from clinical samples, rather, nine strains were also isolated from environmental samples; and some of these strains harbored several virulence genes, which may render those strains pathogenicity potential. Therefore, the emergence of these "environmental" pandemic V. parahaemolyticus strains may poses a new threat to the public health in China. Furthermore, six novel serotypes and 34 novel STs were identified among the 72 isolates, indicating that V. parahaemolyticus were widely distributed and fast evolving in the environment in Jiangsu, China. The findings of this study provide new insight into the phylogenic relationship between V. parahaemolyticus strains of pandemic serotypes from clinical and environmental sources and enhance the MLST database; and our proposed possible O- and K- antigen evolving paths of V. parahaemolyticus may help understand how the serotypes of this dispersed bacterial population evolve.
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Affiliation(s)
- Jingjiao Li
- Animal Quarantine Laboratory, Jiangsu Entry-Exit Inspection and Quarantine BureauNanjing, China; Key Laboratory of Veterinary Biotechnology, Department of Animal Science, School of Agriculture and Biology, Shanghai JiaoTong UniversityShanghai, China
| | - Feng Xue
- Animal Quarantine Laboratory, Jiangsu Entry-Exit Inspection and Quarantine Bureau Nanjing, China
| | - Zhenquan Yang
- Jiangsu Key Laboratory of Zoonosis, School of Food Science and Engineering, Yangzhou University Yanghzou, China
| | - Xiaoping Zhang
- Beijing Kemufeng Biopharmaceutical Company Beijing, China
| | - Dexin Zeng
- Animal Quarantine Laboratory, Jiangsu Entry-Exit Inspection and Quarantine Bureau Nanjing, China
| | - Guoxiang Chao
- Yangzhou Key Centre for Disease Control and Prevention Yanghzou, China
| | - Yuan Jiang
- Animal Quarantine Laboratory, Jiangsu Entry-Exit Inspection and Quarantine Bureau Nanjing, China
| | - Baoguang Li
- Division of Molecular Biology, Center for Food Safety and Applied Nutrition, US Food and Drug Administration Laurel, MD, USA
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Gao L, Deng YQ, Chen C, Ke CW, Li BS, Long YY, Liu ZH, Wei L. Population Relationship of Vibrio parahaemolyticus Isolates Derived from Aquaculture Ponds, a Seafood Market, Restaurants, and Clinical Samples. Foodborne Pathog Dis 2016; 13:333-42. [PMID: 27166752 DOI: 10.1089/fpd.2015.2098] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
To study the relationship between environmental and clinical populations of Vibrio parahaemolyticus, we collected in total 86 isolates from Southern China during one and a half years. Sixty-eight isolates were recovered from aquaculture ponds, a seafood market, and restaurants, and 18 isolates were recovered from clinical samples. Virulence gene analysis revealed that 25 isolates (14 clinical and 11 environmental) tested positive for tdh, but only 4 carried trh. Interestingly, none of the tdh(+) environmental isolates was recovered from ponds. Both environmental and clinical tdh(+) isolates, except for one clinical isolate, harbor type III secretion system 2α (T3SS2α) and T3SS2β-related genes, including vopB2α, which was previously suggested to be absent from environmental strains. More than 70% of clinical isolates carried the pandemic marker of new toxRS (GS-PCR(+)), which was not present in the environmental isolates. Pulsed-field gel electrophoresis and multilocus sequence typing analysis showed a high degree of genetic diversity within the environmental isolates. In contrast, the clinical population formed a tight cluster that differed from the environmental isolates. These findings suggest that the pandemic strains of V. parahaemolyticus may not directly originate from marine animals. Rather the environments where they are maintained could serve as reservoirs for toxigenic, but not pandemic strains. These environments provide an ideal place for generation of new toxigenic strains through DNA exchange, which was revealed by extensive recombination events in recA sequences of the environmental isolates.
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Affiliation(s)
- Lei Gao
- 1 CAS Key Laboratory of Tropical Marine Bio-resources and Ecology , South China Sea Institution of Oceanology, CAS, Guangzhou, China
| | - Yi Qin Deng
- 1 CAS Key Laboratory of Tropical Marine Bio-resources and Ecology , South China Sea Institution of Oceanology, CAS, Guangzhou, China
| | - Chang Chen
- 1 CAS Key Laboratory of Tropical Marine Bio-resources and Ecology , South China Sea Institution of Oceanology, CAS, Guangzhou, China
| | - Chang Wen Ke
- 2 Institute of Pathogenic Microorganisms, Guangdong Provincial Center for Disease Control and Prevention , Guangzhou, China
| | - Bo Sheng Li
- 2 Institute of Pathogenic Microorganisms, Guangdong Provincial Center for Disease Control and Prevention , Guangzhou, China
| | - Yun Ying Long
- 1 CAS Key Laboratory of Tropical Marine Bio-resources and Ecology , South China Sea Institution of Oceanology, CAS, Guangzhou, China
| | - Zhu Hong Liu
- 1 CAS Key Laboratory of Tropical Marine Bio-resources and Ecology , South China Sea Institution of Oceanology, CAS, Guangzhou, China
| | - Lu Wei
- 1 CAS Key Laboratory of Tropical Marine Bio-resources and Ecology , South China Sea Institution of Oceanology, CAS, Guangzhou, China
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Akther F, Neogi SB, Chowdhury WB, Sadique A, Islam A, Akhter MZ, Johura FT, Ohnishi M, Watanabe H, Boucher Y, Alam M. Major tdh(+)Vibrio parahaemolyticus serotype changes temporally in the Bay of Bengal estuary of Bangladesh. INFECTION GENETICS AND EVOLUTION 2016; 41:153-159. [PMID: 27063395 DOI: 10.1016/j.meegid.2016.04.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 04/02/2016] [Accepted: 04/05/2016] [Indexed: 11/25/2022]
Abstract
Vibrio parahaemolyticus is responsible for seafood-related gastroenteritis worldwide. In Bangladesh, diarrhea is endemic and diarrheagenic V. parahaemolyticus serotypes occur naturally in the coastal and estuarine aquatic environment. V. parahaemolyticus strains, isolated from estuarine surface water of the Bay of Bengal villages of Bangladesh during 2006-2008, were tested for the presence of virulence and pandemic-marker genes, serodiversity, and phylogenetic relatedness. PCR analysis of V. parahaemolyticus (n=175) showed 53 (30.3%) strains to possess tdh, the major virulence gene encoding thermostable direct hemolysin. Serotyping results revealed the tdh(+)V. parahaemolyticus strains to belong to 10 different serotypes, of which the O8:K21 (30.2%) and O3:K6 (24.5%) were predominantly non-pandemic and pandemic serotypes, respectively; while O5:K30 and O9:KUT were new. The pandemic markers, orf8 and toxRS(variant), were present only in the pandemic serotype O3:K6 (n=13) and its serovariant O4:K68 (n=2). Temporal distribution of the tdh(+) serotypes revealed the O8:K21 to be predominant in 2006 and 2007, while O3:K6 was the predominant tdh(+) serotype in 2008. Pulsed-field gel electrophoresis (PFGE) of SfiI-digested genomic DNA revealed high genetic diversity among the V. parahaemolyticus strains, while dendrogram constructed with the PFGE patterns formed two major clusters separating the tdh(+) O3:K6 and its pandemic serovariants from the tdh(+) non-pandemic (O8:K21) strains, suggesting different lineages for them. The potential health risk related to the prevalent tdh(+) strains, including the observed temporal change of the predominant tdh(+) serotype, from O8:K21 to the pandemic serotype O3:K6 in estuarine surface waters serving as the major source of drinking water suggests the need for routine environmental monitoring to prevent V. parahaemolyticus infection in Bangladesh.
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Affiliation(s)
- Farhana Akther
- Infectious Diseases Division, International Center for Diarrheal Disease Research, Bangladesh (icddr,b), Dhaka 1212, Bangladesh
| | - Sucharit Basu Neogi
- Infectious Diseases Division, International Center for Diarrheal Disease Research, Bangladesh (icddr,b), Dhaka 1212, Bangladesh
| | - Wasimul B Chowdhury
- Infectious Diseases Division, International Center for Diarrheal Disease Research, Bangladesh (icddr,b), Dhaka 1212, Bangladesh
| | - Abdus Sadique
- Infectious Diseases Division, International Center for Diarrheal Disease Research, Bangladesh (icddr,b), Dhaka 1212, Bangladesh
| | - Atiqul Islam
- Infectious Diseases Division, International Center for Diarrheal Disease Research, Bangladesh (icddr,b), Dhaka 1212, Bangladesh
| | | | - Fatema-Tuz Johura
- Infectious Diseases Division, International Center for Diarrheal Disease Research, Bangladesh (icddr,b), Dhaka 1212, Bangladesh
| | - Makoto Ohnishi
- National Institute of Infectious Diseases (NIID), Shinjuku-ku, Tokyo, Japan
| | - Haruo Watanabe
- National Institute of Infectious Diseases (NIID), Shinjuku-ku, Tokyo, Japan
| | - Yan Boucher
- Department of Biological Sciences, University of Alberta, Edmonton, Canada
| | - Munirul Alam
- Infectious Diseases Division, International Center for Diarrheal Disease Research, Bangladesh (icddr,b), Dhaka 1212, Bangladesh;.
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Serogroup, virulence, and molecular traits of Vibrio parahaemolyticus isolated from clinical and cockle sources in northeastern Thailand. INFECTION GENETICS AND EVOLUTION 2016; 39:212-218. [DOI: 10.1016/j.meegid.2016.01.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Revised: 01/05/2016] [Accepted: 01/06/2016] [Indexed: 01/07/2023]
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Phylogenetic and in silico functional analyses of thermostable-direct hemolysin and tdh-related encoding genes in Vibrio parahaemolyticus and other Gram-negative bacteria. BIOMED RESEARCH INTERNATIONAL 2014; 2014:576528. [PMID: 25114910 PMCID: PMC4119642 DOI: 10.1155/2014/576528] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 05/26/2014] [Accepted: 06/12/2014] [Indexed: 11/17/2022]
Abstract
Emergence and spread of pandemic strains of Vibrio parahaemolyticus have drawn attention to make detailed study on their genomes. The pathogenicity of V. parahaemolyticus has been associated with thermostable-direct hemolysin (TDH) and/or TDH-related hemolysin (TRH). The present study evaluated characteristics of tdh and trh genes, considering the phylogenetic and in silico functional features of V. parahaemolyticus and other bacteria. Fifty-two tdh and trh genes submitted to the GenBank were analyzed for sequence similarity. The promoter sequences of these genes were also analyzed from transcription start point to -35 regions and correlated with amino acid substitution within the coding regions. The phylogenetic analysis revealed that tdh and trh are highly distinct and also differ within the V. parahaemolyticus strains that were isolated from different geographical regions. Promoter sequence analysis revealed nucleotide substitutions and deletions at -18 and -19 positions among the pandemic, prepandemic, and nonpandemic tdh sequences. Many amino acid substitutions were also found within the signal peptide and also in the matured protein region of several TDH proteins as compared to TDH-S protein of pandemic V. parahaemolyticus. Experimental evidences are needed to recognize the importance of substitutions and deletions in the tdh and trh genes.
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Pazhani GP, Bhowmik SK, Ghosh S, Guin S, Dutta S, Rajendran K, Saha DR, Nandy RK, Bhattacharya MK, Mukhopadhyay AK, Ramamurthy T. Trends in the epidemiology of pandemic and non-pandemic strains of Vibrio parahaemolyticus isolated from diarrheal patients in Kolkata, India. PLoS Negl Trop Dis 2014; 8:e2815. [PMID: 24786538 PMCID: PMC4006737 DOI: 10.1371/journal.pntd.0002815] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2013] [Accepted: 03/10/2014] [Indexed: 11/19/2022] Open
Abstract
A total of 178 strains of V. parahaemolyticus isolated from 13,607 acute diarrheal patients admitted in the Infectious Diseases Hospital, Kolkata has been examined for serovar prevalence, antimicrobial susceptibility and genetic traits with reference to virulence, and clonal lineages. Clinical symptoms and stool characteristics of V. parahaemolyticus infected patients were analyzed for their specific traits. The frequency of pandemic strains was 68%, as confirmed by group-specific PCR (GS-PCR). However, the prevalence of non-pandemic strains was comparatively low (32%). Serovars O3:K6 (19.7%), O1:K25 (18.5%), O1:KUT (11.2%) were more commonly found and other serovars such as O3:KUT (6.7%), O4:K8 (6.7%), and O2:K3 (4.5%) were newly detected in this region. The virulence gene tdh was most frequently detected in GS-PCR positive strains. There was no association between strain features and stool characteristics or clinical outcomes with reference to serovar, pandemic/non-pandemic or virulence profiles. Ampicillin and streptomycin resistance was constant throughout the study period and the MIC of ampicillin among selected strains ranged from 24 to >256 µg/ml. Susceptibility of these strains to ampicillin increased several fold in the presence of carbonyl cyanide-m-chlorophenyldrazone. The newly reported ESBL encoding gene from VPA0477 was found in all the strains, including the susceptible ones for ampicillin. However, none of the strains exhibited the β-lactamase as a phenotypic marker. In the analysis of pulsed-field gel electrophoresis (PFGE), the pandemic strains formed two different clades, with one containing the newly emerged pandemic strains in this region.
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Affiliation(s)
| | | | - Santanu Ghosh
- National Institute of Cholera and Enteric Diseases, Kolkata, India
| | - Sucharita Guin
- National Institute of Cholera and Enteric Diseases, Kolkata, India
| | - Sanjucta Dutta
- National Institute of Cholera and Enteric Diseases, Kolkata, India
| | | | - Dhira Rani Saha
- National Institute of Cholera and Enteric Diseases, Kolkata, India
| | - Ranjan K. Nandy
- National Institute of Cholera and Enteric Diseases, Kolkata, India
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Haley BJ, Kokashvili T, Tskshvediani A, Janelidze N, Mitaishvili N, Grim CJ, Constantin de Magny G, Chen AJ, Taviani E, Eliashvili T, Tediashvili M, Whitehouse CA, Colwell RR, Huq A. Molecular diversity and predictability of Vibrio parahaemolyticus along the Georgian coastal zone of the Black Sea. Front Microbiol 2014; 5:45. [PMID: 24575085 PMCID: PMC3918589 DOI: 10.3389/fmicb.2014.00045] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 01/21/2014] [Indexed: 11/25/2022] Open
Abstract
Vibrio parahaemolyticus is a leading cause of seafood-related gastroenteritis and is also an autochthonous member of marine and estuarine environments worldwide. One-hundred seventy strains of V. parahaemolyticus were isolated from water and plankton samples collected along the Georgian coast of the Black Sea during 28 months of sample collection. All isolated strains were tested for presence of tlh, trh, and tdh. A subset of strains were serotyped and tested for additional factors and markers of pandemicity. Twenty-six serotypes, five of which are clinically relevant, were identified. Although all 170 isolates were negative for tdh, trh, and the Kanagawa Phenomenon, 7 possessed the GS-PCR sequence and 27 the 850 bp sequence of V. parahaemolyticus pandemic strains. The V. parahaemolyticus population in the Black Sea was estimated to be genomically heterogeneous by rep-PCR and the serodiversity observed did not correlate with rep-PCR genomic diversity. Statistical modeling was used to predict presence of V. parahaemolyticus as a function of water temperature, with strongest concordance observed for Green Cape site samples (Percent of total variance = 70, P < 0.001). Results demonstrate a diverse population of V. parahaemolyticus in the Black Sea, some of which carry pandemic markers, with increased water temperature correlated to an increase in abundance of V. parahaemolyticus.
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Affiliation(s)
- Bradd J Haley
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA
| | - Tamar Kokashvili
- George Eliava Institute of Bacteriophages, Microbiology and Virology Tbilisi, Georgia
| | - Ana Tskshvediani
- George Eliava Institute of Bacteriophages, Microbiology and Virology Tbilisi, Georgia
| | - Nino Janelidze
- George Eliava Institute of Bacteriophages, Microbiology and Virology Tbilisi, Georgia
| | - Nino Mitaishvili
- George Eliava Institute of Bacteriophages, Microbiology and Virology Tbilisi, Georgia
| | - Christopher J Grim
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA ; University of Maryland Institute for Advanced Computer Sciences, University of Maryland College Park, MD, USA
| | | | - Arlene J Chen
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA
| | - Elisa Taviani
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA
| | - Tamar Eliashvili
- George Eliava Institute of Bacteriophages, Microbiology and Virology Tbilisi, Georgia
| | - Marina Tediashvili
- George Eliava Institute of Bacteriophages, Microbiology and Virology Tbilisi, Georgia
| | - Chris A Whitehouse
- U.S. Army Medical Research Institute of Infectious Diseases Fort Detrick, MD, USA
| | - Rita R Colwell
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA ; University of Maryland Institute for Advanced Computer Sciences, University of Maryland College Park, MD, USA ; Bloomberg School of Public Health, Johns Hopkins University Baltimore, MD, USA ; CosmosID™ College Park, MD, USA
| | - Anwar Huq
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA ; School of Public Health, Maryland Institute for Applied Environmental Health, University of Maryland College Park, MD, USA
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Ceccarelli D, Hasan NA, Huq A, Colwell RR. Distribution and dynamics of epidemic and pandemic Vibrio parahaemolyticus virulence factors. Front Cell Infect Microbiol 2013; 3:97. [PMID: 24377090 PMCID: PMC3858888 DOI: 10.3389/fcimb.2013.00097] [Citation(s) in RCA: 125] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 11/23/2013] [Indexed: 12/18/2022] Open
Abstract
Vibrio parahaemolyticus, autochthonous to estuarine, marine, and coastal environments throughout the world, is the causative agent of food-borne gastroenteritis. More than 80 serotypes have been described worldwide, based on antigenic properties of the somatic (O) and capsular (K) antigens. Serovar O3:K6 emerged in India in 1996 and subsequently was isolated worldwide, leading to the conclusion that the first V. parahaemolyticus pandemic had taken place. Most strains of V. parahaemolyticus isolated from the environment or seafood, in contrast to clinical strains, do not produce a thermostable direct hemolysin (TDH) and/or a TDH-related hemolysin (TRH). Type 3 secretion systems (T3SSs), needle-like apparatuses able to deliver bacterial effectors into host cytoplasm, were identified as triggering cytotoxicity and enterotoxicity. Type 6 secretion systems (T6SS) predicted to be involved in intracellular trafficking and vesicular transport appear to play a role in V. parahaemolyticus virulence. Recent advances in V. parahaemolyticus genomics identified several pathogenicity islands (VpaIs) located on either chromosome in both epidemic and pandemic strains and comprising additional colonization factors, such as restriction-modification complexes, chemotaxis proteins, classical bacterial surface virulence factors, and putative colicins. Furthermore, studies indicate strains lacking toxins and genomic regions associated with pathogenicity may also be pathogenic, suggesting other important virulence factors remain to be identified. The unique repertoire of virulence factors identified to date, their occurrence and distribution in both epidemic and pandemic strains worldwide are described, with the aim of highlighting the complexity of V. parahaemolyticus pathogenicity as well as its dynamic genome.
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Affiliation(s)
- Daniela Ceccarelli
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA
| | - Nur A Hasan
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA ; CosmosID Inc. College Park, MD, USA
| | - Anwar Huq
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA ; Maryland Institute of Applied Environmental Health, University of Maryland College Park, MD, USA
| | - Rita R Colwell
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA ; CosmosID Inc. College Park, MD, USA ; Maryland Institute of Applied Environmental Health, University of Maryland College Park, MD, USA ; Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Johns Hopkins University Baltimore, MD, USA
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Lin YR, Lin CS. Genome-wide characterization of Vibrio phage φpp2 with unique arrangements of the mob-like genes. BMC Genomics 2012; 13:224. [PMID: 22676552 PMCID: PMC3468402 DOI: 10.1186/1471-2164-13-224] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Accepted: 05/07/2012] [Indexed: 11/10/2022] Open
Abstract
Background Vibrio parahaemolyticus is associated with gastroenteritis, wound infections, and septicemia in human and animals. Phages can control the population of the pathogen. So far, the only one reported genome among giant vibriophages is KVP40: 244,835 bp with 26% coding regions that have T4 homologs. Putative homing endonucleases (HE) were found in Vibrio phage KVP40 bearing one segD and Vibrio cholerae phage ICP1 carrying one mobC/E and one segG. Results A newly isolated Vibrio phage ϕpp2, which was specific to the hosts of V. parahaemolyticus and V. alginolyticus, featured a long nonenveloped head of ~90 × 150 nm and tail of ~110 nm. The phage can survive at 50°C for more than one hour. The genome of the phage ϕpp2 was sequenced to be 246,421 bp, which is 1587 bp larger than KVP40. 383 protein-encoding genes (PEGs) and 30 tRNAs were found in the phage ϕpp2. Between the genomes of ϕpp2 and KVP40, 254 genes including 29 PEGs for viral structure were of high similarity, whereas 17 PEGs of KVP40 and 21 PEGs of ϕpp2 were unmatched. In both genomes, the capsid and tail genes have been identified, as well as the extensive representation of the DNA replication, recombination, and repair enzymes. In addition to the three giant indels of 1098, 1143 and 3330 nt, ϕpp2 possessed unique proteins involved in potassium channel, gp2 (DNA end protector), tRNA nucleotidyltransferase, and mob-type HEs, which were not reported in KVP40. The ϕpp2 PEG274, with strong promoters and translational initiation, was identified to be a mobE type, flanked by NrdA and NrdB/C homologs. Coincidently, several pairs of HE-flanking homologs with empty center were found in the phages of Vibrio phages ϕpp2 and KVP40, as well as in Aeromonas phages (Aeh1 and Ae65), and cyanophage P-SSM2. Conclusions Vibrio phage ϕpp2 was characterized by morphology, growth, and genomics with three giant indels and different types of HEs. The gene analysis on the required elements for transcription and translation suggested that the ϕpp2 PEG274 was an active mobE gene. The phage was signified to be a new species of T4-related, differing from KVP40.
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Affiliation(s)
- Ying-Rong Lin
- Department of Marine Biotechnology and Resources, Asia-Pacific Ocean Research Center, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
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Association of pandemic Vibrio parahaemolyticus O3:K6 present in the coastal environment of Northwest Mexico with cases of recurrent diarrhea between 2004 and 2010. Appl Environ Microbiol 2012; 78:1794-803. [PMID: 22247160 DOI: 10.1128/aem.06953-11] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In 2004, more than 1,230 cases of gastroenteritis due to pandemic O3:K6 strains of Vibrio parahaemolyticus were reported in southern Sinaloa, a state in Northwestern Mexico. Recurrent sporadic cases arose from 2004 to 2010, spreading from the south to the north. In the present study, Vibrio parahaemolyticus was detected in both environmental samples and clinical cases along the Pacific coast of Sinaloa during 2004 to 2010. An evaluation was made of the serotypes, distribution of virulence genes, and presence of pandemic O3:K6 strains. A total of 144 strains were isolated from environmental samples (from sediment, seawater, and shrimp), and 154 clinical strains were isolated. A total of 10 O serogroups and 30 serovars were identified in the strains. Environmental strains (n = 144) belonged to 10 O serogroups and 28 serovars, while clinical strains (n = 154) belonged to 8 O serogroups and 14 serovars. Ten serovars were shared by both environmental and clinical strains. Among 144 environmental isolates, 4.1% (6/144) belonged to the pandemic clone, with 83.3% containing the orf8 gene and with O3:K6 accounting for 67%. On the other hand, pathogenic strains (tdh and/or trh) accounted for 52% (75/144) of the environmental isolates. Interestingly, among 154 clinical isolates, 80.5% (124/154) were pandemic strains, with O3:K6 (tdh, toxRS(new), and orf8) representing the predominant serovar (99.2%, 123/124). Overall, our results indicate that in spite of a high serodiversity and prevalence of pathogenic Vibrio parahaemolyticus in the environment, the pandemic strain O3:K6 caused >79% of reported cases between 2004 and 2010 in Sinaloa, Mexico.
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Caburlotto G, Haley BJ, Lleò MM, Huq A, Colwell RR. Serodiversity and ecological distribution of Vibrio parahaemolyticus in the Venetian Lagoon, Northeast Italy. ENVIRONMENTAL MICROBIOLOGY REPORTS 2010; 2:151-157. [PMID: 23766011 DOI: 10.1111/j.1758-2229.2009.00123.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Vibrio parahaemolyticus is a natural inhabitant of estuarine and marine environments constituting part of the autochthonous microflora. This species is associated with human gastroenteritis caused by ingestion of contaminated water and undercooked seafood. During the past several years, the number of V. parahaemolyticus gastroenteritis cases have increased worldwide, causing over half of all food-poisoning outbreaks of bacterial origin. Vibrio populations in water are known to be influenced by environmental factors. Notably, it has been shown that in different parts of the world the distribution of V. parahaemolyticus in the marine environment is related to the water temperature. In this study, we identified environmental determinants affecting distribution of V. parahaemolyticus in the Venetian Lagoon, in the Italian North Adriatic Sea. Data obtained revealed that sea surface temperature constitutes the key factor influencing occurrence of V. parahaemolyticus, but salinity and chlorophyll concentration are also important. Serotyping of a collection of V. parahaemolyticus environmental isolates revealed high serodiversity, with serotypes O3:KUT and O1:KUT, belonging to the 'pandemic group', occurring with higher frequency. From our results, we conclude that there is no correlation between serotype and specific geographic site or season of the year. However, certain serotypes were isolated in the Lagoon during the entire 18 months of the study, strongly suggesting persistence in this environment.
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Affiliation(s)
- Greta Caburlotto
- Dipartimento di Patologia, Sezione di Microbiologia, Università di Verona, Strada Le Grazie 8, 37134 Verona, Verona, Italy. Maryland Pathogen Research Institute, Center of Bioinformatics and Computational Biology, Institute of Advanced Computer Studies, University of Maryland, College Park, MD 20742, USA
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