No abstract

No abstract

This paper describes the results of a study concerning the amount of nitrate present in drinking water and soil in selected locations in the Jaffna Peninsula. In several places the ameunt of nitrate-nitrogen is above the safe. level ~pa:*ed in the WHO International Standard for ddnking water.

273 Strains of Escherichia coli isolated from diarrhoeic and healthy control cattle and buffalo calves in Sri Lanka, were tested for Verocytotoxin (VT) and for heat‐stable (ST) and heat‐labile (LT) enterotoxins. VT and ST toxigenic E. coli were significantly associated with diarrhoea, accounting for 28% and 18% of diarrhoeic episodes, respectively. LT toxigenic E. coli were not significantly associated with diarrhoea.

No abstract