Changes

*Abundant in the environment

*Abundant in the environment

*Most strains have low virulence

*Most strains have low virulence

*Found in many non-specific, endogenous infections, eg. wound infections and upper respiratory tract infections and septicaemia

*Found in many non-specific, endogenous infections, eg. wound infections, upper respiratory tract infections, infections of the urinary tract, mammary glands and uterus and septicaemia

*Also an enteropathogen, causing neonatal diarrhoea in young animals and enteric colibacillosis

*Also an enteropathogen, causing neonatal diarrhoea in young animals and enteric colibacillosis

*Pathogenic strains possess virulence factors allowing colonisation of mucosal surfaces

*Pathogenic strains possess virulence factors allowing colonisation of mucosal surfaces