2006年1月23日 · The fecal coliforms group includes those coliforms that produce acid and gas from lactose when grown at temperatures between 44 and 45.5 °C. These organisms are typically of fecal origin. E. coli is usually the dominant bacterium of the fecal coliform group.

2002年3月1日 · The formation of gas in a brilliant green lactose bile broth fermentation tube at any time within 48 h at 35 °C constitutes a positive confirmation test. The fecal coliform test (using an EC medium) can be applied to determine TC that are FC (APHA et al., 1998): the production of gas after 24 h of incubation at 44.5 °C in an EC broth medium ...

2002年3月1日 · The definition of members of the coliform group has recently been extended to include other characteristics, such as β-d-galactosidase-positive reactions (Part 9223; APHA et al., 1998) (enzyme substrate test, Section 4.2). The search for β-galactosidase-positive and β-galactoside-permease-positive organisms also permits a confirmation step ...

1981年1月1日 · Criteria for a Rapid Coliform-Counting Procedure The criteria for an ideal rapid coliform-countingprocedure might include: (1) specificity for fecal coliforms, e.g., E. coli; (2) test completion in less than an hour; (3) results comparable to those achieved by the present standard methods; (4) good reproducibility and accuracy; (5) ability to ...

2003年4月1日 · In July 1999, California's ocean recreational bacterial water quality standards were changed from a total coliform (TC) test to a standard requiring testing for all three bacterial indicators: TC, fecal coliforms (FC), and enterococci (EC).

2023年10月1日 · The concentration of fecal coliforms in those samples was measured by using the fast test paper for coliform bacteria (HPER-LCHJ755) purchased from Helper Tech. Co., Ltd., Guangzhou, China The specific measurement procedure was according to the current standard of the Ministry of Ecology and Environment of China (HJ755-2015).

2021年11月1日 · The existence of fecal coliform bacteria in the water body specifies that the water has been polluted with the fecal substance of warm-blooded animals. Therefore, the enumeration of fecal bacteria is important for basic as well as applied research in aquatic microbial ecology and the development of parameter-based technologies for drinking ...

The limitations of the fecal coliform standard are that non-E. coli fecal coliforms and even non-sewage-related bacteria may predominate in the fecal coliform population, and the fecal indicator does not correlate with the presence of enteric viruses or with naturally occurring pathogens (Ahmed, 1991). Nonetheless sanitary surveys and ...

2023年12月1日 · Fecal coliform DNA extracted from mine water was used as the template, and Bacillus isolated from mine water was used as a negative control. The primer concentration was 0.2 μM. The template concentration was <100 ng, and the mixture was subjected to …

2015年12月1日 · Table 5 shows total coliform, E. coli and Enterococcus spp. counts obtained by the MPN–PCR, and fecal coliform and fecal streptococci counts obtained by conventional methods for the samples collected from five water sampling locations. The results indicated that the highest counts were always obtained at locations 3 and 5, which were directly ...