International conference on marine pollution and ecotoxicology. Hong Kong HKG, 1995/01/22.
Monitoring of water-borne pathogens is important to safeguard public health.
In view of various limitations inherent in the traditional culture methods, the feasibility of using the polymerase chain reaction (PCR) to monitor water-borne pathogens was investigated.
The STN enterotoxin gene of Salmonella typhimurium, the STO enterotoxin gene of Vibrio cholerae, the LTI and LTII enterotoxin genes of Escherichia coli, and the housekeeping genes, ARO-A and PHO-A of S. typhimurium and E. coli, respectively, were used as gene targets for PCR detection of toxigenic and general strains of these organisms.
Six pairs of oligonucleotide primers were chosen to amplify internal fragments of the respective genes, and the identity of the PCR products was confirmed by restriction endonuclease digestion.
The specificity of individual primer pairs in PCR was evaluated on DNA templates of 54 different bacterial isolates.
The results showed that the LTI, LTII and STO primer sets were highly specific for toxigenic strains of E. coli H10407 (LTI+), E. coli SA53 (LTII+) and V. cholerae NRT (STO+), respectively.
The PHO-A primers showed species-specific amplification products for all nine E. coli isolates examined, while the STN and ARO-A primer sets yielded species-specific amplification products for the 10 S. typhimurium isolates tested.
Detection sensitivity of the ARO-A and PHO-A primer sets for S. typhimurium and E. coli, respectively, was estimated at 103 CFU.
Using three di...
Mots-clés Pascal : Eau mer, Contrôle qualité, Contrôle microbiologique, Détection, Salmonella typhimurium, Enterobacteriaceae, Bactérie, Vibrio cholerae, Vibrionaceae, Escherichia coli, Pathogène, Méthode, Réaction chaîne polymérase, Amplification, Gène, Entérotoxine, Gène domestique
Mots-clés Pascal anglais : Seawater, Quality control, Microbiological testing, Detection, Salmonella typhimurium, Enterobacteriaceae, Bacteria, Vibrio cholerae, Vibrionaceae, Escherichia coli, Pathogenic, Method, Polymerase chain reaction, Amplification, Gene, Enterotoxin, Housekeeping gene
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Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0107592
Code Inist : 002A05B14. Création : 199608.