Salmoella

An assignment on

Salmonellosis in poultry submitted to Dr K.S.Prajapati Professor & head Pathology Dep. Veterinary college Anand

Avian salmonellosis  Avian

salmonellosis is a term comprising of a large group of acute or chronic diseasesof fowl.  These diseases are cause by any one or more members of the genus Salmonella.

Diseases cause by Salmonella in Poultry  Pullorum

Disease  Fowl typhoid  Fowl paratyphoid

Salmonella pullorum Salmonella galinarum

Salmonella typhinurium , Salmonella enteritidis ( and more then 200 types of Salmonella

Pullorum disease.  The

organisum is non motile and antgenicaly identical with S.gallinerum.  In its acute form, pullorum disease is almost exclusively a disease of young chickens, and the agent can be recovered from almost all chicken organs, tissues and faeces.  In older birds that have become carriers, S. pullorum is most frequently recovered from the ova.

Pathogenesis Young

chicks most susceptible Older chicks comparatively resistant Lighter breeds(leghorn)resistant than heavy breed Disease follows in cycles in natural host Vertical and horizontal transmission

Clinical Signs  Reduced

hatchability  Increase Percentage of dead in shell embryo  Young chicks : Dull,Inactive,Hurdling,Gasping with pesty vents.  Mortality in second week up to 60-70 % in sever cases servivals may become cerrier .  Adult

Fowl typhoid  Septicaemic

disease of domesticed bird  May be acute or chronic  Cause by Salmonella gallinarum  Disease is transmitted vertically as well as horizontally

Clinical Signs  Among

chicks mortality strat within 2-3 days after hatching.  Chicks become dull, loss of appetite, white diarrhoea  Amongs breeders and layers –dullness, loss of appetite, high temp,drowsiness and green diarrhoea.

Gross lesions (fowl typhoid)  Heamorrhages,

caseous nodules on Myocardium &throught Intestine  Bilateral Pneumonia in young chick.  Enlargement of liver and spleen  Necrotic foci are seen on the surfaces of liver &spleen.

Diagnosis of salmonellosis  History  Clinical

signs,  P.M. lesions  Isolation of causative organism for confirmation

Treatment  Antibiogram  Enrofloxacin

1ml /Litter water  Furazolidone @ 2kg per tone of feed for 10 days  Biotrime 1ml/2 Litter of water

control  Pullorum

testing(18 wks of age pref.)  Egg from infected breeder should not be use  Deep litter systen should be avoided  Improve the hygienic cond. Of farm

Electron microscopy of sallmonella