Important Key Points

Question 1

roseola

Answer 1

• Human Herpes Virus 6/7
• Herpesviridae; -dsDNA; enveloped
• HHV6 rep in T and B cells and oral pharync epithelium
• HHV7 replicates in CD4 Tcells
• HIGH FEVER 4 days then rash for 1-2 days after fever

Question 2

erythema infectiosum

Answer 2

• fifth disease - B19 virus
• parvovirus; ssDNA
• replicates in mitotically active cells (hematopoeitic cells of bone)
• RASH ON CHEEK START –> spread to in lace pattern to rest of body
• self resolve