Hog Cholera ( Classical swine fever)

• Acute, highly contagious virus disease affecting pigs of all ages
• Characterized by high morbidity and mortality ( >90%)

a) Etiology:

• Pestivirus of Togaviridae family

b) Transmission:

• Direct contact with infected pig
• Ingestion of contaminated feed and water
• Placental route
• Uncooked meat of pig

c) Pathogenesis:

• Entry of virus through mucous membrane à Multiplication in tonsils à initial viremia within 24 hrs à virus reach to spleen, bone marrow

d) Symptoms:

• Fever ( 105-106⁰F)
• Ocular discharge
• Gluing of eyes
• Purplish discoloration of skin
• Reproductive failure in sow

e) Diagnosis:

• Symptoms and lesions
• ELISA test
• Isolation of virus

f) Differential diagnosis:

• Pasteurellosis
• Salmonellosis

g) Prevention and treatment:

• Affected pigs are slaughtered and carcass buried
• Strict sanitary procedures
• Control pig movement
• Surveillance of infected zone and surrounding area