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Aeromonas spp. and microbial indicators in raw drinking water source BJM
Di Bari,Marisa; Hachich,Elayse M.; Melo,Adalgisa M.J.; Sato,Maria I. Z..
Aeromonas species are autochtonous in the aquatic environment and some of them have been associated with health effects like wound infections, septicemia and diarrhoeal illness. In this study, the occurrence of Aeromonas spp. and microbial indicators in raw drinking water from wells, springs, fountains and mineral waters was evaluated. A total of 126 water samples was analyzed for Aeromonas spp. by the membrane filtration technique using ADA media and by P/A test. Typical colonies of Aeromonas spp. were submitted to biochemical tests for species differentiation. Toxin production was tested using Y-1 mouse adrenal cells. Coliforms and heterotrophic bacteria were enumerated by membrane filtration and pour plate techniques, respectively. P. aeruginosa, C....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aeromonas; Raw drinking water; Microbial indicators; Heat labile toxin.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000300025
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Comparison of thermotolerant coliforms and Escherichia coli densities in freshwater bodies BJM
Hachich,Elayse M.; Di Bari,Marisa; Christ,Ana Paula G.; Lamparelli,Cláudia C.; Ramos,Solange S.; Sato,Maria Inês Z..
Fecal bacterial indicator analyses have been widely used for monitoring the water quality. This study was designed to determine the ratio between the density of Escherichia coli and other Thermotolerant Coliforms (TtC) bacteria from freshwater samples collected for a two-year period of monitoring. TtC were enumerated by membrane filtration on mFC agar. E. coli enumeration was done by two methods: TtC colonies identified in mFC were inoculated in EC-MUG or water samples were filtered and inoculated in modified mTEC agar media, and both methods were compared for quantitative recovery of E. coli. The results pointed out a mean percentage of E. coli among other thermotolerant coliforms (E. coli/TtC ratio) of 84.3% in mFC media. Taking these results into...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Thermotolerant Coliforms (TtC); E. coli; Water quality; Microbiological standards.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000200032
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