Forty four strains of E.coli were isolated from children suffering from diarrhoea. Among which 19 strains were typed as enteropa thogenic E.coli, 17 (38.64%) strains belonged to Osc/K. (B.), one (2.27%) strian to each of 0 /K.
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12867 (8,9). All the 44 strains were tested for toxigenicity by the infant mouse test. The results showed that enterotoxin was produced by 7 (36.84%) of the enteropathogenic strains and by 3 (12%) of non-enteropathogenic strains. These findings showed the importance of this test for the detection of toxigenic strains of E.coli.