Epi Mix AC 5601-5800 Flashcards
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
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
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