Enterohaemolysin production was found in 11 (20.3%) out of 54 Escherichia coli strains isolated from stools of infants with dyspepsia and in 3 (2.3%) out of 130 E. coli strains isolated from urinary tract infections. Enterohaemolysin producing E. coli strains isolated from stools belonged to O groups 25 and 111 and the strains from urine to O groups 1 and 15. None of the enterohaemolysin-producing strains isolated from dyspepsia was shown to cause any damage on Vero cells.
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