Bacteriological findings in lake, river and well water supplies of Rangoon

ABSTRACT

Water samples, both unchlorinated and chlorinated, from 20 natural water sources in Rangoon town comprising lakes, river and wells were examined during the period July 1966 to July 1968 for the Presumptive Coliform Count, the Presumptive Enterococcus Count and the presence of presumptive Clostridium perfringens. Bacteria isolated from MacConkey bile salt lactose peptone water (Cruickshank, 1965) and sodium azide medium (Hannay and Norton, 1947) primary cultures were identified. Using as criteria the Presumptive Coliform Count, the Presumptive Enterococcus Count and the isolation of Escherichia coli and/or Klebsiella aerogenes and/or Streptococcus faecalis, 18 out of 20 samples were found unsatisfactory for drinking purposes. The bacteria isolated were E. coli, K. aerogenes, Citrobacter freundii, Enterobacter aerogenes, Alcaligenes faecalis, a Bacillus sp., Proteus mirabilis, P. morganii, P. vulgaris, a Providencia Etrain, Pseudomonas aeruginosa, P. fluorescent and s. faecalis.