Veterinary Preventive Medicine-II

CLINICAL FEATURES

• The incubation period is up to five days.
• Subclinical infection is common. Affected animals, which are usually more than one year old, become febrile
• Vesicles develop on the tongue and on oral mucous membranes, often accompanied by profuse salivation
• Secondary lesions may occur on the coronary band and teats. Lameness is often a prominent feature of the disease in pigs
• Mastitis may develop in cows with severe teat lesions. In the absence of secondary infection, lesions generally heal within two weeks.
• Following infection, animals develop high levels of neutralizing antibodies but the duration of protection is variable.

Cattle

• The incubation period is 3-15 days.
• There is a sudden appearance of mild fever and the development of vesicles on the dorsum of the tongue, dental pad, lips and the buccal mucosa.
• Development of vesicles is usually accompanied by ropy salivation. Vesicles ruptured followed by erosive necrotic lesion. Subclinical infection is common.
• Affected animals, which are usually more than one year old, become febrile.
• Secondary lesions may occur on the coronary band and teats. Mastitis may develop in cows with severe teat lesions.
• In the absence of secondary infection, recovery is rapid, affected animals are clinically normal in 3-10 days.
• Cross-protection between vesicular stomatitis Indiana virus and vesicular stomatitis New Jersey virus is limited.

Horses

• There is fever, depression and drooling of saliva.
• Affected horse may rupture their lips on troughs.
• Vesicles coalesce, rupture and formation of shallow ulcers.
• Lesions are also seen in coronary band and teats.

Pigs

• Lameness is more common.