ANELLOVIRIDAE

Question 1

Give the transmission mode of Chicken anemia virus.

Answer 1

Transmission:
*** Horizontally
- Inhalation or oral exposure; virus is shed in feces and feather dander

*** Vertically
- Breeder flocks may become infected before they begin to lay fertile eggs; for as long as the hen is viremic
- If hens are seropositive, maternal antibody generally protects chicks from disease, but not from infection

Question 2

What are the clinical signs of Chicken anemia virus?

Answer 2

*** Acute, immunosuppressive disease of young chicks characterized by:
- anorexia
- lethargy
- depression
- anemia
- atrophy
- hypoplasia of lymphoid organs
- intramuscular hemorrhages
- increased mortality