Rash

Question 1

Which rash spreads centripetal and which centrifugal?

Answer 1

Chickenpox is centripetal - starts on face and scalp and trunk, most spots on centre of body

Smalllpox is centrifugal - most lesions on extremities

Question 2

What type of virus is HHV-7? What is the receptor? Site of latency? And clinical symptoms?

Answer 2

Betaherpes virus (closely related to HHV6)

CD4

T cells

Fever, rash, roseola, rarely febrile seizures

Suggested to be linked with dermatological lesions, and neurological complications including encephalitis