Bovine diarrhoea virus
1999
Kiss,I.
The infection caused by bovine viral diarrhoea virus (BVDV) usually causes mild clinical symptoms in immunocompetent cattle.When infecting pregnant animals, the virus may invade the fetus, causing different pathological changes that largely depend on the affected period of gestation.In the first month of pregnancy, BVDV infection results in early embryonic death, return to heat, and abortion.Infection of the fetus by a non-cythopathogenic strain of BVDV between the 40th and 120th days of pregnancy leads to the delivery of persistently infected, immunotolerant animals that are consistently viraemic and can shed the virus during their whole lifetime.Infection between the 90th and 150th days of pregnancy may produce disorders of the central nervous system and the eyes.
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