Virulence characteristics of heterotrophic bacteria commonly isolated from potable water

Heterotrophic bacteria isolated from drinking water distribution systems were examined to determine if they possessed putative virulence factors such as hemolysins, proteases, or cytotoxins. Representative samples of colonies from several different distribution systems indicated that the median perc...

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Bibliographic Details
Published inEnvironmental toxicology and water quality Vol. 8; no. 1
Main Authors Lye, D.J, Dufour, A.P
Format Journal Article
LanguageEnglish
Published 01.02.1993
Subjects
AGUA POTABLE
BACTERIA
CALIDAD DEL AGUA
EAU POTABLE
METHODE
METODOS
MICROORGANISME
MICROORGANISMOS
PODER PATOGENO
POUVOIR PATHOGENE
QUALITE DE L'EAU
SALUD PUBLICA
SANTE PUBLIQUE
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Summary:Heterotrophic bacteria isolated from drinking water distribution systems were examined to determine if they possessed putative virulence factors such as hemolysins, proteases, or cytotoxins. Representative samples of colonies from several different distribution systems indicated that the median percentage of heterotrophic bacteria having at least one putative virulence characteristic was about 11% and all of the samples contained bacteria expressing at least one putative virulence characteristic. The overall frequency of bacteria from drinking water distribution samples expressing more than one putative virulence factor ranged from 0 to 8%. The eukaryotic cell culture cytotoxicity test appeared to be the most reliable indicator of those bacteria expressing multiple virulence factors. The results also indicated that the expression of putative virulence factors was highly dependent upon the type of isolation medium used. Although slow-growing heterotrophic bacteria occurred at high densities in certain systems, they expressed very few of the putative virulence factors observed in this study
Bibliography:P10
9433331
ISSN:1053-4725
1098-2256
DOI:10.1002/tox.2530080103