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====Acute Infections: Pregnant Animals====

====Acute Infections: Pregnant Animals====

When acute BVDV infection occurs during pregnancy, the dam may show any clinical outcomes that are seen in non-pregnant animals. However, BVDV has a high potential to cross the placenta and infect the developing foetus, meaning additional outcomes of infection may occur in the calf. The main factor influencing the virus’s effects on the foetus is the gestational age at the time of transplacental infection.

When acute BVDV infection occurs during pregnancy, the dam may show any of the clinical manifestations that are seen in non-pregnant animals. BVDV is also able to cross the placenta and infect the developing foetus and so there may be additional outcomes of infection that depend on the stage of gestation.

Infection at the time of insemination may result in reduced conception rates, and that shortly after increases loss of embryos (Carlsson et. al, 1989; McGowan et. al, 1993). Foetal infection in the first trimester (50-100 days) can cause death, although expulsion of the foetus may not occur until several months later.

Infection at the time of insemination may result in reduced conception rates, and that shortly after increases loss of embryos (Carlsson et. al, 1989; McGowan et. al, 1993). Foetal infection in the first trimester (50-100 days) can cause death, although expulsion of the foetus may not occur until several months later.