Changes

**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  

**Traverse gut wall to lamina propria

**Invade epithelial cells of small intestine by inducing endocytosis  

**Traverse gut wall to lamina propria and enter lymphatics

*Enterohaemorrhagic ''E. coli'':

*Enterohaemorrhagic ''E. coli'':

**Possibly carried by cattle

**Possibly carried by cattle