| Autor: |
Hachich EM; Companhia Ambiental do Estado de São Paulo , Sao Paulo, SP , Brasil., Di Bari M, Christ AP, Lamparelli CC, Ramos SS, Sato MI |
| Jazyk: |
angličtina |
| Zdroj: |
Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] [Braz J Microbiol] 2012 Apr; Vol. 43 (2), pp. 675-81. Date of Electronic Publication: 2012 Jun 01. |
| DOI: |
10.1590/S1517-83822012000200032 |
| Abstrakt: |
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 account, a mandatory standard of 1000 thermotolerant coliforms would correspond to 800 E. coli and the adoption of these E. coli based standards will represent a major improvement for the monitoring of freshwater quality. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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