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Tian X, Hu J, Wei T, Ding W, Miao Q, Ning Z, Fan S, Wu H, Lu J, Lyu M, Wang S. Fast and sensitive graphene oxide-DNAzyme-based biosensor for Vibrio alginolyticus detection. JOURNAL OF FISH DISEASES 2022; 45:687-697. [PMID: 35176196 DOI: 10.1111/jfd.13594] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/19/2022] [Accepted: 01/21/2022] [Indexed: 06/14/2023]
Abstract
DNAzymes have been widely and effectively used for the detection of pathogenic bacteria, which pose a serious public health threat. However, the rapid and cost-effective detection of such bacteria remains a major challenge. In this study, we successfully selected Vibrio alginolyticus-specific DNAzymes. The activity of the candidates was assessed via fluorescence intensity and gel electrophoresis. The DNAzyme DT1 had a detection limit of 31 CFU/ml for V. alginolyticus and exhibited high specificity. Graphene oxide (GO) was used to develop a DNAzyme-based fluorescent sensor for the detection of V. alginolyticus, which significantly improved detection performance and shortened the reaction time as little as 10 s. The proposed method was then validated using crab, shrimp, fish, clam, and oyster samples. This study thus provides a new method for the rapid and sensitive detection of V. alginolyticus.
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Affiliation(s)
- Xueqing Tian
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Jinfei Hu
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Tong Wei
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Wen Ding
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Qingzhen Miao
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Zhe Ning
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Shihui Fan
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Hangjie Wu
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Jing Lu
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Mingsheng Lyu
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Shujun Wang
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
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2
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Gxalo O, Digban TO, Igere BE, Olapade OA, Okoh AI, Nwodo UU. Virulence and Antibiotic Resistance Characteristics of Vibrio Isolates From Rustic Environmental Freshwaters. Front Cell Infect Microbiol 2021; 11:732001. [PMID: 34490150 PMCID: PMC8416912 DOI: 10.3389/fcimb.2021.732001] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 07/31/2021] [Indexed: 01/22/2023] Open
Abstract
The study investigated the occurrence of antimicrobial resistance genes and virulence determinants in Vibrio species recovered from different freshwater sheds in rustic milieu. A total of 118 Vibrio isolates comprising Vibrio fluvialis (n=41), Vibrio mimicus (n=40) and V. vulnificus (n=37) was identified by amplification of ToxR, vmh and hsp60 genes. The amplification of virulence genes indicated that V. mimicus (toxR, zot, ctx, VPI, and ompU) genes were detected in 12.5%, 32.5%, 45%, 37.5% and 10% respectively. V. fluvialis genes (stn, hupO and vfh) were harboured in 48.8%, 14.6% and 19.5% isolates congruently. The other virulence genes that include vcgC and vcgE were observed in 63.1% and 29% of isolates belonging to V. vulnificus. With the exceptions of imipenem, meropenem and ciprofloxacin, most isolates exhibited more than 50% resistance to antibiotics. The antimicrobial resistance was more prevalent for polymyxin B (100%), azithromycin (100%) and least in ciprofloxacin (16.1%). Multiple antibiotic resistance index range was 0.3 and 0.8 with most isolates showing MARI of 0.8. The blaTEM, AmpC, blaGES, blaIMP, blaOXA-48 and blaKPC genes were detected in 53.3%, 42%, 29.6%, 16.6%, 15%, 11.3% and 5.6% of the isolates. Non-beta lactamases such as streptomycin resistance (aadA and strA), gentamicin resistance (aphA1) and quinolone resistance gene (qnrVC) were found in 5.2%, 44.3%, 26% and 2.8%. Chloramphenicol resistance genes (cmlA1 and catII) were found in 5.2% and 44.3% among the isolates. Our findings reveal the presence of antimicrobial resistance genes and virulent Vibrio species in aquatic environment which can have potential risk to human and animal's health.
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Affiliation(s)
- Oyama Gxalo
- South Africa Medical Research Center (SAMRC) Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa.,Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa
| | - Tennison O Digban
- South Africa Medical Research Center (SAMRC) Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa.,Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa
| | - Bright E Igere
- South Africa Medical Research Center (SAMRC) Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa.,Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa
| | - Ola A Olapade
- Biology Department, Albion College, Albion, MI, United States
| | - Anthony I Okoh
- South Africa Medical Research Center (SAMRC) Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa.,Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa
| | - Uchechukwu U Nwodo
- South Africa Medical Research Center (SAMRC) Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa.,Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa
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Guan H, Xue P, Zhou H, Sha D, Wang D, Gao H, Li J, Diao B, Zhao H, Kan B, Zhang J. A multiplex PCR assay for the detection of five human pathogenic Vibrio species and Plesiomonas. Mol Cell Probes 2020; 55:101689. [PMID: 33338586 DOI: 10.1016/j.mcp.2020.101689] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/04/2020] [Accepted: 12/10/2020] [Indexed: 01/07/2023]
Abstract
A multiplex PCR (mPCR) assay was established to detect five pathogenic Vibrio species and Plesiomonas shigelloides. Twelve genes were included: ompW, ctxA, rfbN, and wbfR from V. cholerae; tl, tdh, and trh from V. parahaemolyticus; toxR and vmhA from V. mimicus; toxR from V. fluvialis; vvhA from V. vulnificus; and the 23S rRNA gene from P. shigelloides. The specificity of the mPCR assay was 100% for the detection of 136 strains and the limits of detection (LoD) were 12.5-50 pg/reaction. The assay exhibited higher sensitivity than cultivation methods in the detection of APW cultures of 113 diarrhea samples. In the analysis of 369 suspected Vibrio populations from estuarine water samples, the specificity of the mPCR for V. cholerae and V. parahaemolyticus was 100% for both, while the sensitivities were 100% and 96.1%, respectively. The assay can be applied to screen enrichment cultures and suspected colonies from environmental and clinical samples.
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Affiliation(s)
- Hongxia Guan
- Wuxi Center for Disease Control and Prevention, Jiangsu, 214023, China
| | - Panpan Xue
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Haijian Zhou
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Dan Sha
- Wuxi Center for Disease Control and Prevention, Jiangsu, 214023, China
| | - Duochun Wang
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - He Gao
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Jie Li
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Baowei Diao
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Hongqun Zhao
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Biao Kan
- State Key Laboratory for 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
| | - Jingyun Zhang
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China.
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Wu W, Jing Z, Yu X, Yang Q, Sun J, Liu C, Zhang W, Zeng L, He H. Recent advances in screening aquatic products for Vibrio spp. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2018.11.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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5
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Rodrigues PA, Ferrari RG, Conte-Junior CA. Application of molecular tools to elucidate the microbiota of seafood. J Appl Microbiol 2018; 124:1347-1365. [PMID: 29345036 DOI: 10.1111/jam.13701] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 01/09/2018] [Accepted: 01/11/2018] [Indexed: 12/19/2022]
Abstract
The aim of this review is to present the methodologies currently applied to identify microbiota and pathogens transmitted to humans through seafood consumption, focusing on molecular techniques and pointing out their importance, advantages, disadvantages and applicability. Knowledge of available techniques allows researchers to identify which technique best fits their expectations. With such discernment, it will be possible to infer which disadvantages will be present and, therefore, not interfering with the final result. Two methodologies can be employed for this purpose, dependent and independent cultures. However, the dependent culture has certain limitations that can be solved through the independent cultivation techniques, such as PCR, PFGE and NGS, especially through the sequencing of the 16S rRNA region, providing a complete view of microbial diversity. These have revolutionized microbiological knowledge, mainly because they allow for the identification of uncultivable micro-organisms, which represent a substantial portion of total micro-organisms, making it possible to elucidate not yet described taxa which may display pathogenic potential, besides quantifying microbial communities, microbiota genetics, translated proteins and produced metabolites. In addition, transcriptomic and metabolomic techniques also allow for the evaluation of possible impacts that microbial communities may create in their environment, as well as the determination of potential pathogenicity to humans.
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Affiliation(s)
- P A Rodrigues
- Department of Food Technology, Faculty of Veterinary, Molecular & Analytical Laboratory Center, Universidade Federal Fluminense, Niterói, Brazil
| | - R G Ferrari
- Department of Food Technology, Faculty of Veterinary, Molecular & Analytical Laboratory Center, Universidade Federal Fluminense, Niterói, Brazil.,Chemistry Institute, Food Science Program, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - C A Conte-Junior
- Department of Food Technology, Faculty of Veterinary, Molecular & Analytical Laboratory Center, Universidade Federal Fluminense, Niterói, Brazil.,Chemistry Institute, Food Science Program, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,National Institute of Health Quality Control, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
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Detection of Viable Vibrio cholerae Cells in Seafood Using a Real-Time Visual Loop-Mediated Isothermal Amplification Combined with Propidium Monoazide. FOOD ANAL METHOD 2017. [DOI: 10.1007/s12161-017-0981-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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7
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Fluorescence-based bioassays for the detection and evaluation of food materials. SENSORS 2015; 15:25831-67. [PMID: 26473869 PMCID: PMC4634490 DOI: 10.3390/s151025831] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 09/28/2015] [Accepted: 09/30/2015] [Indexed: 12/12/2022]
Abstract
We summarize here the recent progress in fluorescence-based bioassays for the detection and evaluation of food materials by focusing on fluorescent dyes used in bioassays and applications of these assays for food safety, quality and efficacy. Fluorescent dyes have been used in various bioassays, such as biosensing, cell assay, energy transfer-based assay, probing, protein/immunological assay and microarray/biochip assay. Among the arrays used in microarray/biochip assay, fluorescence-based microarrays/biochips, such as antibody/protein microarrays, bead/suspension arrays, capillary/sensor arrays, DNA microarrays/polymerase chain reaction (PCR)-based arrays, glycan/lectin arrays, immunoassay/enzyme-linked immunosorbent assay (ELISA)-based arrays, microfluidic chips and tissue arrays, have been developed and used for the assessment of allergy/poisoning/toxicity, contamination and efficacy/mechanism, and quality control/safety. DNA microarray assays have been used widely for food safety and quality as well as searches for active components. DNA microarray-based gene expression profiling may be useful for such purposes due to its advantages in the evaluation of pathway-based intracellular signaling in response to food materials.
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Chen W, Yu S, Ren J, Shi C, Hang F, Guo B. Development of a PCR Assay for Rapid Detection of C
ronobacter sakazakii
from Powdered Infant Formula Using a Target Sequence Identified by Comparative Genomic Analysis. J Food Saf 2015. [DOI: 10.1111/jfs.12185] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Wanyi Chen
- State Key Laboratory of Dairy Biotechnology; Technology Center of Bright Dairy & Food Co., Ltd.; 1518 West Jiangchang Rd Shanghai 200436 China
| | - Shuijing Yu
- School of Resources and Environment; Jiangxi University of Science and Technology; Ganzhou Jiangxi China
| | - Jing Ren
- State Key Laboratory of Dairy Biotechnology; Technology Center of Bright Dairy & Food Co., Ltd.; 1518 West Jiangchang Rd Shanghai 200436 China
| | - Chunlei Shi
- MOST-USDA Joint Research Center for Food Safety; School of Agriculture & Biology; State Key Lab of Microbial Metabolism; Shanghai Jiao Tong University; Shanghai China
| | - Feng Hang
- State Key Laboratory of Dairy Biotechnology; Technology Center of Bright Dairy & Food Co., Ltd.; 1518 West Jiangchang Rd Shanghai 200436 China
| | - Benheng Guo
- State Key Laboratory of Dairy Biotechnology; Technology Center of Bright Dairy & Food Co., Ltd.; 1518 West Jiangchang Rd Shanghai 200436 China
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Khemthongcharoen N, Wonglumsom W, Suppat A, Jaruwongrungsee K, Tuantranont A, Promptmas C. Piezoresistive microcantilever-based DNA sensor for sensitive detection of pathogenic Vibrio cholerae O1 in food sample. Biosens Bioelectron 2015; 63:347-353. [DOI: 10.1016/j.bios.2014.07.068] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 07/13/2014] [Accepted: 07/24/2014] [Indexed: 10/25/2022]
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Chen W, Ai L, Yang J, Ren J, Li Y, Guo B. Development of a PCR assay for rapid detection ofCronobacterspp. from food. Can J Microbiol 2013; 59:656-61. [PMID: 24102218 DOI: 10.1139/cjm-2013-0243] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The occurrence of outbreaks of necrotizing meningitis caused by Cronobacter spp. in neonates highlights the need for rapid detection and accurate identification of this pathogenic species. The gold standard for isolation and identification of Cronobacter spp. from powdered infant formula is time consuming and labor intensive. The gyrB gene that encodes the B subunit of DNA gyrase (topoisomerase type II) was found to be suitable for the identification of Cronobacter spp. A region of the gyrB gene of 38 Cronobacter spp. strains and 5 Enterobacter spp. strains was amplified and sequenced, and a pair of primers was designed and synthesized based on the sequence of the gyrB gene. A polymerase chain reaction (PCR) system was developed and optimized to detect Cronobacter spp. The PCR assay amplified a 438 bp DNA product from all 38 Cronobacter spp. strains tested but not from 34 other bacteria. The detection limit was 1.41 pg/PCR (equivalent 282 genomic copies) when the genomic DNA of Cronobacter sakazakii ATCC 29544 was 10-fold diluted. Infant formula powders from 3 different commercial brands were inoculated with strains ATCC 29544 at a level of 56 colony-forming units, and the target fragment were produced after samples were enriched for 6 h at 37 °C. Twenty-five food samples were evaluated by the PCR assay and the conventional method. A PCR product of the expected size was obtained from 3 samples; however, Cronobacter spp. strains were isolated from only 2 samples by the conventional method. This method is a useful tool for rapid identification of Cronobacter spp. in food and potentially environmental samples.
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Affiliation(s)
- Wanyi Chen
- State Key Laboratory of Dairy Biotechnology, Technology Center of Bright Dairy & Food Co., Ltd., 1518 West Jiangchang Road, Shanghai 200436, People’s Republic of China
| | - Lianzhong Ai
- State Key Laboratory of Dairy Biotechnology, Technology Center of Bright Dairy & Food Co., Ltd., 1518 West Jiangchang Road, Shanghai 200436, People’s Republic of China
| | - Jielin Yang
- Shanghai Entry-Exit Inspection and Quarantine Bureau, 1208 Minsheng Road, Shanghai 200135, People’s Republic of China
| | - Jing Ren
- State Key Laboratory of Dairy Biotechnology, Technology Center of Bright Dairy & Food Co., Ltd., 1518 West Jiangchang Road, Shanghai 200436, People’s Republic of China
| | - Yunfei Li
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People’s Republic of China
| | - Benheng Guo
- State Key Laboratory of Dairy Biotechnology, Technology Center of Bright Dairy & Food Co., Ltd., 1518 West Jiangchang Road, Shanghai 200436, People’s Republic of China
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Optimization and Application of a Custom Microarray for the Detection and Genotyping of E. coli O157:H7 in Fresh Meat Samples. FOOD ANAL METHOD 2013. [DOI: 10.1007/s12161-013-9639-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Koralage MSG, Alter T, Pichpol D, Strauch E, Zessin KH, Huehn S. Prevalence and molecular characteristics of Vibrio spp. isolated from preharvest shrimp of the North Western Province of Sri Lanka. J Food Prot 2012; 75:1846-50. [PMID: 23043835 DOI: 10.4315/0362-028x.jfp-12-115] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study investigated the prevalence and molecular characteristics of Vibrio spp. in farmed shrimp (Penaeus monodon) in Sri Lanka. A total of 170 shrimp samples (100 g of whole shrimp each) taken from individual ponds from 54 farms were collected 1 week prior to harvest from the North Western Province of Sri Lanka. Overall, 98.1% of the farms and 95.1% of the ponds were positive for Vibrio spp. in shrimp; at the pond level, V. parahaemolyticus (91.2%) was most common, followed by V. alginolyticus (18.8%), V. cholerae non-O1/non-O139 (4.1%), and V. vulnificus (2.4%). Multiple Vibrio spp. were detected in 20.6% of the ponds. None of the V. parahaemolyticus isolates (n = 419) were positive for the virulence-associated tdh (thermostable direct hemolysin) and trh (TDH-related hemolysin) genes. V. cholerae was confirmed by the presence of ompW, and all isolates (n = 8) were negative for the cholera toxin (ctxA) gene. V. cholerae isolates were serogrouped by PCR and identified as V. cholerae non-O1/non-O139. All four V. vulnificus strains, isolated from different ponds of two geographical regions, showed pathogenic potential; they belonged to vcgC sequence type, type B 16S rRNA genotype and contained a pilF polymorphism associated with human pathogenicity. The results of this study revealed the ubiquitous nature of vibrios in farmed shrimp. To minimize the potential risk of Vibrio infections due to handling or consumption of raw or undercooked seafood products, good manufacturing practices as well as proper handling and processing should be addressed.
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Detection and characterization of pathogenic vibrios in shellfish by a Ligation Detection Reaction-Universal Array approach. Int J Food Microbiol 2012; 153:474-82. [DOI: 10.1016/j.ijfoodmicro.2011.11.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Revised: 09/23/2011] [Accepted: 11/11/2011] [Indexed: 11/23/2022]
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