parvoviruses
TRANSCRIPT
• The Parvoviruses, show a still further degree of dependence .
smallest of all human viruses
• Densovirinae
• Parvovirinae
• Parvovirus
• Dependoviruses
• Erythrovirus
• Bocavirus
Genus Viruses Diseases
Erythrovirus B19 Erythema infectiosum, fetal infection, Aplastic anemia
Parvovirus RAV-1 Possibly implicated in rheumatoid arthritis
Bocavirus Newly discovered respiratory and enteric virus
Dependovirus Adeno-associated(AAV) types 1-5 AAV-2 possibly implicated in fetal infections
• Erythema infectiosum
• Fetal infection
• Aplastic crisis
• Infectious rash is sometimes known as (fifth disease).
• Slapped cheek syndrome
teratogenic
hydrops fetalis
transfusion of the fetus with concentrated erythrocytes.
Aplastic crisis(anemia)
• In chronic hemolytic anemia patients (SCA or thalassemia), parvovirus infection may precipitate an aplastic crisis with very low Hb and disappearance of circulating reticulocytes
fatal