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Signs and symptoms. The incubation period of CPV is generally 4-7 days. Individuals normally have severe enteritis, however occasionally, animals may only have mild symptoms. Signs usually consist of depression, severe vomiting, refusal of food and water, abdominal pain and profuse smelly, bloody diarrhoea.ause of canine parvovirus. The cause of canine parvovirus disease is a highly contagious DNA-containing virus. There are currently two types prevalent in the UK, namely CPV-2a and CPV-2b. The virus is transmitted through the mouth or nose from faeces.
The incubation period for hepatitis B virus (HBV) is 30-180 days (average, approximately 75 days). Patients then enter the prodromal or preicteric phase, characterized by the gradual onset of anorexia, malaise, and fatigue.epatitis C. The incubation period for hepatitis C virus (HCV) is 15-150 days, with symptoms developing anywhere from 5-12 weeks after exposure. During acute HCV infection, symptoms may appear similar to those of HBV infection.