Miscellaneous Viral Diseases
Miscellaneous Viral Diseases
Avian Encephalomyelitis
Avian Encephalomyelitis
100
Control
80
% egg production
Preventive vaccination of breeder pullets and layer pullets with live AE vaccine before egg production is the only effective means of AE control. If a breeder flock has not been, or has been inadequately or not vaccinated against AE and an outbreak occurs, it is advisable to stop hatching eggs from the flock for several weeks until the breeders have acquired immunity and no longer transmit AE virus through their eggs.
60
40
egg production % 20
0
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Age weeks
AE infected young chickens. Effect of AE on egg production
56
57