Dp. Falcao et al., PATHOGENIC OR POTENTIALLY PATHOGENIC BACTERIA AS CONTAMINANTS OF FRESH-WATER FROM DIFFERENT SOURCES IN ARARAQUARA, BRAZIL, Water research, 27(12), 1993, pp. 1737-1741
The microbiological quality of various fresh waters in the Araraquara
region, state of Sao Paulo, Brazil was investigated. Ninety-nine water
samples were taken from rivers, reservoirs, artesian and non-artesian
wells, springs and tap waters, and these waters were analysed using:
plate counts of heterotrophic microorganisms (per 1 ml); Most Probable
Number (MPN) of fecal coliforms and E. coli (per 100 ml); tests for p
resence of Salmonella, Shigella, Yersinia, the E. coli pathogens of cl
asses EPEC, ETEC and EIEC and Mycobacterium, Shigella, Yersinia and en
teroinvasive E. coli (EIEC) were not isolated. The other types of micr
oorganisms were isolated in varying proportions. We conclude that the
waters investigated represent a potential microbiological health risk.