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Epi > Birna > Flashcards

Birna Flashcards

1
Q

Bursitis virus targets the premature B lymphocytes

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2
Q

The bursitis virus causes per os infection

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3
Q

Some Gumboro disease vaccines can be applied only besides yolk immunity

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4
Q

Watery diarrhoea is typical clinical sign of Gumboro disease

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5
Q

There are several virulence variants of bursitis virus

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6
Q

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

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7
Q

Bursitis virus is highly contagious

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8
Q

Immunocomplex vaccines can be applied to prevent Gumboro disease

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9
Q

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

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10
Q

Anaemia and cyanosis can be clinical signs of Gumboro disease

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11
Q

Vaccines are available to control Gumboro disease

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12
Q

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

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13
Q

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

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14
Q

Bursitis virus infection can reduce the efficacy of vaccinations

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15
Q

Bursitis virus infection results in immunosuppression

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16
Q

Bursitis virus is shed in the faeces

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17
Q

Infectious bursitis can predispose chicken to Fowl Paratyphoid

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18
Q

Infectious bursitis is a very contagious disease

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19
Q

Early IBDV infection damages the humoral immunity

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20
Q

Anaemia and depression are frequent signs of infectious bursal disease

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21
Q

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

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22
Q

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

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23
Q

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

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24
Q

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

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25
Q

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

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26
Q

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

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27
Q

The infectious bursitis virus has more than one virulence variants

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28
Q

The infectious bursitis virus causes anaemia

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29
Q

The infectious bursitis virus can be isolated on CAM

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30
Q

The resistance of infectious bursitis virus is very high

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31
Q

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

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32
Q

By disinfection of the eggshell we can prevent IBDV infection

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33
Q

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

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34
Q

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

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Epi (19 decks)

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