Regarding slow viral diseases which is false:
|A||Visna is progressive pneumonia|
|B||Creutzfeldt-Jakob disease results in dementia|
|C||Kuru is attributed to cannabalistic practice|
|D||Rarely rubella can cause a clinical picture similar to SSPE|
a. Visna, Creutzfeldt-Jaakob disease and Kuru are diseases caused by prions.
b. Visna causes progressive demyelinating disease in sheep.
c. Whereas progressive pneumonia is seen in another disease Maedi.
Characteristics of slow virus diseases are:
a. They have long incubation periods ranging from months to years.
b. They have slow but relentless progressive courses terminating fatally.
c. They have a genetic pre-disposition.
d. The immune system does not seem to play a role in its protection.