Explain E. coli - Microbiological Study of Water?
It is always present in human intestine so its presence indicates the faecal pollution and possible presence of other human or animal intestinal pathogens. Other indicator microorganisms include total coliforms, faecal streptococci, faecal enterococci etc. Faecal enterococci are increasingly being used as an indicator of faecal contamination in brackish and marine water because of slower death rate.