Parvovirus B19 (B19V) is a single-stranded DNA virus of the family Parvoviridae and genus Erythrovirus. Although parvoviruses commonly cause disease in animals, it was only in 1975 that the first human pathogen of this family was discovered by Cossart and colleagues while screening normal blood bank donors' sera for the hepatitis antigen (one of the donors' serum samples was coded B19).
Canine parvovirus type 2 (CPV2, colloquially parvo) is a contagious virus mainly affecting dogs, and thought to originate in cats. The current consensus is that the feline panleukopenia mutated into CPV2. Parvo is highly contagious and is spread from dog to dog by direct or indirect contact with their feces. Vaccines can prevent this infection, but mortality can reach 91% in untreated cases. Treatment often involves veterinary hospitalization. Canine parvovirus may infect other mammals; however, it will not infect humans
Canine minute virus (or minute virus of canines; MVC) is a strain of Carnivore bocaparvovirus of the family Parvoviridae that infects dogs. It is similar to bovine parvovirus in its protein structure and DNA. A virus causing respiratory disease in humans has been called human bocavirus due to its similarity to these viruses. Canine minute virus was originally discovered in Germany in 1967 in military dogs, although it was originally thought to not cause disease. Dogs and puppies are infected orally, and the virus is spread transplacentally to the fetuses. Symptoms are seen most commonly between the ages of one to three weeks and include severe diarrhea, difficulty breathing, and anorexia. In severe cases, illness can be fatal.
In experimental infections, the virus is spread transplacentally when the dam is infected between 25 and 30 days of gestation and can result in abortion. When the dam is infected between 30 and 35 days, the puppies were sometimes born with myocarditis and anasarca. Pathologicallesions in fetuses in experimental infections were found in the lung and small intestine
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http://www.aafp.org/afp/2007/0201/p373.html clinical presentations of parvovirus b19 infection by jessica t. servey, lt col (sel), usaf, mc, travis air force base, california:brian v. reamy, col, usaf, mc, uniformed services university of the health sciences, bethesda, maryland:joshua hodge, capt, usaf, mc, andrews air force base, maryland am fam physician. 2007 feb 1;75(3):373-376.