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**Cause attching and effacing lesions in the gut, with necrosis of enterocytes and stunting and fusion of villi
**Cause attching and effacing lesions in the gut, with necrosis of enterocytes and stunting and fusion of villi
*Enteroinvasive ''E. coli'':
*Enteroinvasive ''E. coli'':
**Bacteraemia and septicaemia
**Cause colisepticaemia in calves during their first week of life; occasionally in lambs, piglets and puppies
**Dysentry-like strains
**Dysentry-like strains
**Invade epithelial cells by inducing endocytosis
**Infection via ingestion or umbilicus; inadequate colostrum increases susceptibility
**Traverse gut wall to lamina propria
**Invade epithelial cells of small intestine by inducing endocytosis
**Traverse gut wall to lamina propria and enter lymphatics
**Bacteraemia or septicaemia and endotoxaemia follow
**Death occurs in absense of treatment
*Enterohaemorrhagic ''E. coli'':
*Enterohaemorrhagic ''E. coli'':
**Possibly carried by cattle
**Possibly carried by cattle