Brazilian Journal of Microbiology
versión On-line ISSN 1678-4405
BELOTI, Vanerli et al. Evaluation of Petrifilm EC and HS for total coliforms and Escherichia coli enumeration in water. Braz. J. Microbiol. [online]. 2003, vol.34, n.4, pp. 301-304. ISSN 1678-4405. http://dx.doi.org/10.1590/S1517-83822003000400002.
Petrifilm EC and HS were compared to the MPN method to determine their efficacy to enumerate total coliforms and E. coli in 145 samples of water (76 water in natura, 69 drinking water). For water in natura, Petrifilm HS and EC showed good correlation with MPN method. In chlorinated water (< 20 col/100 mL and negatives) the agreement was low. For E.coli enumeration, Petrifilm EC showed a good correlation with MPN method. The results indicated that Petrifilm EC and HS are accurate to enumerate coliforms and E. coli in water when the expected counts are higher than 20/100 mL.
Palabras clave : water; coliforms; Escherichia coli; Petrifilm.