( Birnaviruses) Infectious Bursal Disease (Gumboro Disease)

Question 1

Bursitis virus targets the premature B lymphocytes

Answer 1

T

Question 2

The bursitis virus causes per os infection

Answer 2

T

Question 3

Meat type hybrids are more sensitive to Gumboro disease than layers

Answer 3

F

Question 4

Clinical signs of Gumboro disease can be seen in chickens older than 8 weeks

Answer 4

F

Question 5

Some Gumboro disease vaccines can be applied only besides yolk immunity

Answer 5

T

Question 6

Watery diarrhoea is typical clinical sign of Gumboro disease

Answer 6

T

Question 7

There are several virulence variants of bursitis virus

Answer 7

T

Question 8

Clinical signs of Gumboro disease can be seen in chickens younger than 8 weeks

Answer 8

T

Question 9

Bursitis virus is highly contagious

Answer 9

T

Question 10

Immunocomplex vaccines can be applied to prevent Gumboro disease

Answer 10

T

Question 11

Clinical signs of Gumboro disease can be seen in chickens younger than 8 days

Answer 11

T

Question 12

Before vaccination against Gumboro disease the level of maternal immunity in the flock
should be determined

Answer 12

T

Question 13

Anaemia and cyanosis can be clinical signs of Gumboro disease

Answer 13

T

Question 14

Bursitis virus causes the highest mortality in day old chicks

Answer 14

F

Question 15

Vaccines are available to control Gumboro disease

Answer 15

T

Question 16

In the prevention of Gumboro disease in ovo vaccinations can be applied

Answer 16

T

Question 17

The bursitis virus is very sensitive to the environmental conditions

Answer 17

F

Question 18

Bursitis virus causes disease only in chicken

Answer 18

F

Question 19

The bursitis virus can retain its infectivity for 1-4 months in the litter

Answer 19

T

Question 20

Both serotypes of bursitis virus are pathogenic

Answer 20

F

Question 21

Bursitis virus infection can reduce the efficacy of vaccinations

Answer 21

T

Question 22

Bursitis virus infection results in immunosuppression

Answer 22

T

Question 23

Bursitis virus is shed in the faeces

Answer 23

T

Question 24

Infectious bursitis can predispose chicken to Fowl Paratyphoid.

Answer 24

T

Question 25

In Europe only low virulence strains of infectious bursitis virus can be found

Answer 25

F

Question 26

Infectious bursitis is a very contagious disease

Answer 26

T

Question 27

Pigeons are the most susceptible to IBDV

Answer 27

F

Question 28

Early IBDV infection damages the humoral immunity

Answer 28

T

Question 29

Both serotypes of bursitis virus are pathogenic

Answer 29

F

Question 30

The bursitis virus mostly causes germinative infection

Answer 30

F

Question 31

IBDV type 2 is used for immunization of chicken against infectious bursal disease

Answer 31

F

Question 32

Ibdv is a zoonotic virus

Answer 32

F

Question 33

The infectious bursal disease virus is transmitted only vertically

Answer 33

F

Question 34

Anaemia and depression are frequent signs of infectious bursal disease

Answer 34

T

Question 35

Only inactivated vaccines can be used against infectious bursal disease

Answer 35

F

Question 36

The infectious bursal disease virus is very sensitive to detergents

Answer 36

F

Question 37

In Europe only low virulence strains of Infectious Bursal Disease Virus (IBDV) can be found.

Answer 37

F

Question 38

The Infectious bursal disease virus (IBDV) is very resistant in the environment.

Answer 38

T

Question 39

Infection of day-old chicken with IBDV may cause permanent immunosuppression.

Answer 39

T

Question 40

Pathology lesions of the Infectious Bursal Disease can be similar to the Avian influenza.

Answer 40

T

Question 41

Young chicken can be immunized only with inactivated IBDV vaccines.

Answer 41

F

Question 42

Very virulent strains of the Infectious Bursal Disease virus (IBDV) may cause disease in chicken with maternally derived antibodies too

Answer 42

T

Question 43

IBDV does not cause disease in adult chicken (over 2 months of age

Answer 43

T

Question 44

Fever, diarrhea and anemia are signs of the Infectious Bursal Disease.

Answer 44

T

Question 45

Vaccines provide high level of protection against all IBDV strains

Answer 45

F

Question 46

IBDV serotype 2 is used for immunization of chicken against Infectious Bursal Disease.

Answer 46

F

Question 47

Clinical manifestations of infectious bursal disease are seen mainly in chicken between the age of 3 and 6 weeks.

Answer 47

T

Question 48

``` Moderately attenuated (“hot”) IBDV vaccines are used for the immunization of young chicken without yolk immunity. ```

Answer 48

F

Question 49

The infectious bursitis virus has more than one virulence variants

Answer 49

T

Question 50

The infectious bursitis virus causes anaemia

Answer 50

T

Question 51

The infectious bursitis virus can be isolated on CAM.

Answer 51

T

Question 52

There is no vaccine available against infectious bursitis virus

Answer 52

F

Question 53

The resistance of infectious bursitis virus is very high.

Answer 53

T

Question 54

IBDV causes immunosuppression in chicken between 2-8 weeks of age

Answer 54

T

Question 55

By disinfection of the eggshell we can prevent IBDV infection.

Answer 55

T

Question 56

Infectious bursal disease causes severe illness, mainly in waterfowl.

Answer 56

F

Question 57

The most frequent sign of infectious bursal disease is lameness.

Answer 57

F

Question 58

Only attenuated live vaccines are effective against infectious bursal disease.

Answer 58

F

Question 59

Several antigenic and virulence variants of infectious bursal disease virus are known

Answer 59

T

Question 60

The infectious bursitis is usually seen in 3 to 8 weeks-old flocks.

Answer 60

T

Question 61

The most frequent sign of infectious bursal disease is lameness due to the inflammation of the subtendinal bursae.

Answer 61

F

Question 62

The infectious bursitis virus is inactivated within 1-2 days in the environment.

Answer 62

F

Question 63

A frequent sign of the infectious bursitis is encephalitis.

Answer 63

F

Question 64

The infectious bursitis virus does not cause any damage in chickens under the age of two weeks.

Answer 64

F