Detection of Vibrio Cholerae O1 and O139 in Environmental Water Samples by an Immunofluorescent-aggregation Assay
Overview
Microbiology
Authors
Affiliations
Environmental waters are an important reservoir for Vibrio cholerae, and effective surveillance of the pathogen can help to warn of and prevent infection with this potentially fatal pathogen. An immunofluorescent-aggregation (IFAG) assay to detect V. cholerae O1 and O139 was established and evaluated with estuarine water samples. The practical application of this assay was compared with the conventional culture method and real-time PCR. The IFAG method had a sensitivity of 10(3) CFU/ml for detection of V. cholerae O1 and O139 strains in a suspension containing 10 different species of enterobacterial strains (total, 10(5) CFU/ml). Ten fluorescent bacterial aggregate colonies were randomly picked and tested positive in serum agglutination tests for the V. cholerae O1 and O139 strains, showing a high specificity. The enrichment broths of 146 samples of estuarine water were tested, and the percentage positive by the IFAG assay was 19.9% (29/146), which was significantly higher than that of the conventional culture method (10.3%, 15/146; P < 0.01) but lower than that of real-time PCR (29.5%, 43/146; P < 0.01). The coincidence rates of real-time PCR and IFAG detection were decreased with the reduction of the V. cholerae concentration. The IFAG method, with a high specificity and a relatively high sensitivity, may be used for detection and isolation of V. cholerae in environmental water samples.
Robertson J, Garza E, Stubbusch A, Dupont C, Hwa T, Held N mBio. 2024; 15(8):e0003824.
PMID: 38958440 PMC: 11325263. DOI: 10.1128/mbio.00038-24.
An efficient DNAzyme for the fluorescence detection of .
Miao Q, Ding W, Bao X, Wang S, Lin Q, Xu Y Food Sci Nutr. 2023; 11(6):3235-3245.
PMID: 37324923 PMC: 10261802. DOI: 10.1002/fsn3.3304.
Igere B, Okoh A, Nwodo U Arch Microbiol. 2022; 204(6):323.
PMID: 35567650 PMC: 9107296. DOI: 10.1007/s00203-022-02866-1.
Wastewater based environmental surveillance of toxigenic Vibrio cholerae in Pakistan.
Zohra T, Ikram A, Salman M, Amir A, Saeed A, Ashraf Z PLoS One. 2021; 16(9):e0257414.
PMID: 34591885 PMC: 8483414. DOI: 10.1371/journal.pone.0257414.
Clayton K, Moehling T, Lee D, Wereley S, Linnes J, Kinzer-Ursem T Sci Rep. 2019; 9(1):1739.
PMID: 30741961 PMC: 6370876. DOI: 10.1038/s41598-018-38056-7.