( Birnaviruses) Infectious Bursal Disease (Gumboro Disease) Flashcards
Bursitis virus targets the premature B lymphocytes
T
The bursitis virus causes per os infection
T
Meat type hybrids are more sensitive to Gumboro disease than layers
F
Clinical signs of Gumboro disease can be seen in chickens older than 8 weeks
F
Some Gumboro disease vaccines can be applied only besides yolk immunity
T
Watery diarrhoea is typical clinical sign of Gumboro disease
T
There are several virulence variants of bursitis virus
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Clinical signs of Gumboro disease can be seen in chickens younger than 8 weeks
T
Bursitis virus is highly contagious
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Immunocomplex vaccines can be applied to prevent Gumboro disease
T
Clinical signs of Gumboro disease can be seen in chickens younger than 8 days
T
Before vaccination against Gumboro disease the level of maternal immunity in the flock
should be determined
T
Anaemia and cyanosis can be clinical signs of Gumboro disease
T
Bursitis virus causes the highest mortality in day old chicks
F
Vaccines are available to control Gumboro disease
T
In the prevention of Gumboro disease in ovo vaccinations can be applied
T
The bursitis virus is very sensitive to the environmental conditions
F
Bursitis virus causes disease only in chicken
F
The bursitis virus can retain its infectivity for 1-4 months in the litter
T
Both serotypes of bursitis virus are pathogenic
F
Bursitis virus infection can reduce the efficacy of vaccinations
T
Bursitis virus infection results in immunosuppression
T
Bursitis virus is shed in the faeces
T
Infectious bursitis can predispose chicken to Fowl Paratyphoid.
T
In Europe only low virulence strains of infectious bursitis virus can be found
F