Veterinary Preventive Medicine-II

DIFFERENTIAL DIAGNOSIS

Salmonellosis

• common in pigs between 2-4 months of age but swine fever affects pigs of all age groups.
• In salmonellosis diarrhea is the leading feature.
• Bacteriological investigations are able to differentiate the salmonellosis and swine fever.
• Button ulcers of intestine is not present in salmonellosis

Swine erysipelas

• Characterized by diamond markings on the skin.
• In swine fever turkey egg appearance of the kidney is seen, but in swine erysipelas the kidney is congested and dark red in colour.
• Bacteriological examination differentiate the swine erysipelas with swine fever

Colibacillosis

• Enteritis during the first week of age, high fever and death within 48 hours are the common clinical findings in Colibacillosis.
• Smears from faeces and culture will reveal gram negative E.coli organism.

Purpura haemorrhagica

• Etiology of the disease is not known. It is a self-limiting disease.
• Postmortem examination will reveal subcutaneous hemorrhage extending to skeletal muscles, heart, lungs, intestine, kidneys and urinary bladder.
• Laboratory tests will rule out the possibility of swine fever.

Mulberry heart diseas

• This disease usually affects the best, healthy pigs exclusively. No fever, lesions confined to heart. Pericardium remains distended with jelly like fluids.
• Increased creatinine phosphokinase level in the serum is noticed.

Necrotic enteritis

• Predilection site caecum and colon. The lesions are superficial in nature and can be removed easily. Button ulcers are not present

Aujeszky’s disease

• Widespread nervous manifestations in the young suckling pigs characterized by convulsions and prostration than the nervous manifestations in swine fever

Salt poisoning

• This is an afebrile condition which sets in suddenly and affects large number of piglets in a pen.
• Grinding of teeth, champing of jaws, frothing of mouth, blindness, head pressing, and vomition are seen. Responds to therapy with adlibdum water.