Changes

===Clinical Signs===

===Clinical Signs===

The disease caused by bovine viral diarrhoea virus is known as bovine viral diarrhoea. It might be expected from this nomenclature that diarrhoea is a key clinical feature in BVDV infection, but disease can actually manifest in a variety of ways, ranging from subclinical disease to muscosal disease. Virulence factors related to genotype and strain are partially responsible for these variations, but host factors are also important. Pregnancy status, stage of gestation, immunity and the level of develoment of the foetal immune system all contribute to the outcome of BVDV infection.

The disease caused by bovine viral diarrhoea virus is known as bovine viral diarrhoea. It might be expected from this nomenclature that diarrhoea is a key clinical feature in BVDV infection, but disease can actually manifest in a variety of ways ranging from subclinical disease to muscosal disease. Virulence factors related to genotype and strain are partially responsible for these variations, but host factors are also important. Pregnancy status, stage of gestation, immunity and the level of development of the foetal immune system all contribute to the outcome of BVDV infection.

====Acute Infections: Non-Pregnant Cattle====

====Acute Infections: Non-Pregnant Cattle====