Changes

*Some strains possess fimbrae which attach the bacteria to the small intestinal epithelium of particular animal species

*Some strains possess fimbrae which attach the bacteria to the small intestinal epithelium of particular animal species

*K88 (F4) is associated with adhesion to the small intestinal mucosa of pigs

*K88 (F4) is associated with adhesion to the small intestinal mucosa of pigs

*K99 (F5) associated with adhesion in pigs and cattle (these possess certain fimbrae, and are now renamed F antigens)

*K99 (F5) associated with adhesion in pigs and cattle (these fimbrial adhesins were originally thought to be capsular (K) antigens)

*The fimbrae are encoded by plasmids

*The fimbrae are encoded by plasmids

*''E. coli'' may cause diarrhoea via attaching and efacing lesions, where bacteria adhere intimately to the enterocyte, and cause localised effacement of the brush border microvilli

*''E. coli'' may cause diarrhoea via attaching and efacing lesions, where bacteria adhere intimately to the enterocyte, and cause localised effacement of the brush border microvilli