Gumboro Disease Flashcards
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
T
linical signs of Gumboro disease can be seen in chickens younger than 8 weeks
T
Bursitis virus is highly contagious
T
Immunocomplex vaccines can be applied to prevent Gumboro disease
T
Clinical signs of Gumboro disease can be seen in chickens younger than 8 days
F
Before vaccination against Gumboro disease the level of maternal immunity in the flock should be determined
T– gia na dis an tha valis hot vaccine epidi to hot theli high levels of maternal immunity
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
Infectious bursitis is a very contagious disease
T
Pigeons are the most susceptible to IBDV
F
Early IBDV infection damages the humoral immunity
T
The bursitis virus mostly causes germinative infection
F- Aerogenous/per os/conjunctival feaces contaminate egg shells and infection in hatchery
IBDV type 2 is used for immunization of chicken against infectious bursal disease
F
Ibdv is a zoonotic virus
F
The infectious bursal disease virus is transmitted only vertically
F
Anaemia and depression are frequent signs of infectious bursal disease
T
Only inactivated vaccines can be used against infectious bursal disease
F
The infectious bursal disease virus is very sensitive to detergents
F
In Europe only low virulence strains of Infectious Bursal Disease Virus (IBDV) can be found
F
The Infectious bursal disease virus (IBDV) is very resistant in the environment
T
Infection of day-old chicken with IBDV may cause permanent immunosuppression
T
Pathology lesions of the Infectious Bursal Disease can be similar to the Avian influenza
T– but no cns signs in IBDV
Young chicken can be immunized only with inactivated IBDV vaccines
F
Very virulent strains of the Infectious Bursal Disease virus (IBDV) may cause disease in chicken with maternally derived antibodies too
T
IBDV does not cause disease in adult chicken (over 2 months of age
T
Fever, diarrhea and anemia are signs of the Infectious Bursal Disease
T
Vaccines provide high level of protection against all IBDV strains
F(cross rxns but no cross protection)
Clinical manifestations of infectious bursal disease are seen mainly in chicken between the age of 3 and 6 weeks
T
Moderately attenuated (“hot”) IBDV vaccines are used for the immunization of young chicken without yolk immunity
F
The infectious bursitis virus has more than one virulence variants
T
The infectious bursitis virus causes anaemia
T
The infectious bursitis virus can be isolated on CAM
T
There is no vaccine available against infectious bursitis virus
F
The resistance of infectious bursitis virus is very high
T
The infectious bursitis virus spreads by mosquitoes
F
IBDV causes immunosuppression in chicken between 2-8 weeks of age
T
By disinfection of the eggshell we can prevent IBDV infection
T
Infectious bursal disease causes severe illness, mainly in waterfowl
F
The most frequent sign of infectious bursal disease is lameness
F
Only attenuated live vaccines are effective against infectious bursal disease
F
Several antigenic and virulence variants of infectious bursal disease virus are known
T
The infectious bursitis is usually seen in 3 to 8 weeks-old flocks
T
The most frequent sign of infectious bursal disease is lameness due to the inflammation of the subtendinal bursae
F
The infectious bursitis virus is inactivated within 1-2 days in the environment
F
A frequent sign of the infectious bursitis is encephalitis
F
The infectious bursitis virus does not cause any damage in chickens under the age of two weeks
F–it causes but is less than 30% mortality. it does not cause in older than 8 weeks and most severity is between 2-8 weeks
