Birnaviridae Flashcards
1
Q
Birnaviridae characters
A
Genus:Avibirnavirus
Non enveloped
Double stranded rna virus
Bi segmented
2
Q
Serotypes of birnaviridae
A
Serotype 1 and serotype 2
3
Q
Serotype 1
A
Chicken affected
3 types classic, variant , very virulebt
4
Q
Infectious bursal disease synonyms
A
Avian nephrosis
Gumbaro disease
5
Q
Horizontal and vertical. Transmission
A
Horizontal through body fluids
Vertical through
Mother to offspring
6
Q
Pathogenesis of ibd
A
Oral Duodenum jejenum. Ileum Liver Bursa of fabricus Spleen and other lymphoid organs
7
Q
Clinical. Signs
A
2-3 days incubation period More susceptible is 3-6 weeks old Depression distress ruffled feathere Anorexia Trembling
8
Q
Lesions
A
Bursal enlargement
Edema
Kidney lesions urate
Death bursa atrophy
9
Q
Cam lesions
A
Oedema of embryo
Dwarfing
Liver necrosis
10
Q
Vaccines available are
A
Parent stock : 18 weeks intramuscular
Inactivated
Young birds: live vaccine 18 days drinking water
