Fowl Typhoid

Fowl Typhoid

Causative agent – Salmonella gallinarum.

Incidence and distribution – distributed all over the world in chicken, also reported in ducks, pheasants, guined fowl, goose and quails.

Transmission

g   Through water, feed, wild birds, animals, files, unsterllised fish and meat meals.

g   It can be transmitted vertically.

Signs

g   Increased mortality

g   Reduced feed consumption.

g   Drop in egg production.

g   Watery mucoid yellowish diarrhea.

g   Pale combs. 

Gross Lesions

g   The most consistent finding is swollen fragile liver with dark red or almost black colour and the surface has distinctive coppery bronze sheen. 

g   In subacute or chronic stage-greenish brown or bronze colour swollen liver.

Enlarged bronzed liver - in right

g   Occasionally Milliary type grayish white foci are seen in the liver and myocardium 

Milliary nodules in liver

g   Misshapen and discoloured ova.

g   Enlarged spleen.

g   Catarrhal inflammation of intestine.

g   Dark brown bone marrow is the characteristic feature of this disease.

Diagnosis

The organism can be isolated from affected visceral organs