What is the typical clinical presentation of parvovirus infection in dogs?

• A. Acute and usually hemorrhagic gastroenteritis in dogs 6 weeks to 6 months old
• B. Chronic coughing and sneezing
• C. Seizures and ataxia
• D. Dermal rash

Answer: (A)

Parvovirus in dogs most often presents as an acute, hemorrhagic gastroenteritis in young puppies, typically 6 weeks to 6 months old. The virus targets rapidly dividing cells in the intestinal lining and bone marrow, leading to sudden vomiting, profuse bloody diarrhea, dehydration, and often leukopenia. Puppies may be depressed and febrile or have a low-grade fever, and secondary infections are common due to immunosuppression. Vaccination status influences susceptibility, with unvaccinated or underimmunized puppies at highest risk. The other descriptions refer to problems outside the typical gastrointestinal and hematologic impact of parvovirus (respiratory illness, seizures/ataxia, or skin rashes), so they do not fit the common presentation.