Changes

***Death within 24-48 hours during peracute disease

***Death within 24-48 hours during peracute disease

***Animals depressed with sunken eyes

***Animals depressed with sunken eyes

**'''Avian [[Intestines - Catarrhal Enteritis#Colibacillosis|colibacillosis]]''':  

**[[Intestines - Catarrhal Enteritis#Colibacillosis|'''Colibacillosis''']]:

***Septicaemia in newly-hatched chickens

***Avian:

***Infection enters via faecal contamination of the egg surface or via the ovary of the hen

****Septicaemia in newly-hatched chickens

***Infection enters via the respiratory tract

****Infection enters via faecal contamination of the egg surface or via the ovary of the hen

***A bacteraemia develops

****Infection enters via the respiratory tract

***Acute colisepticaemia, subacute fibrinopurulent serositis or chronic granulomatous disease of the viscera

****A bacteraemia develops

***Occurs in older birds via inhalation of ''E. coli'' in dust; respiratory infection spreads to the blood to cause acute colisepticaemia

****Acute colisepticaemia, subacute fibrinopurulent serositis or chronic granulomatous disease of the viscera

***Airsacculitis, pericarditis and perihepatitis during acute phase

****Occurs in older birds via inhalation of ''E. coli'' in dust; respiratory infection spreads to the blood to cause acute colisepticaemia

***Often secondary to virus or mycoplasma infection or environmental stress

****Airsacculitis, pericarditis and perihepatitis during acute phase

****Often secondary to virus or mycoplasma infection or environmental stress

**'''Colisepticaemia''':

**'''Colisepticaemia''':

***Systemic disease in young calves, piglets, foals, lambs

***Systemic disease in young calves, piglets, foals, lambs