Avian - Infectious Bronchitis Virus (IBV) Flashcards

1
Q

What is the cause of IBV?

A

Coronavirus (Infectious bronchitis virus, group 3 precise)

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2
Q

Is IBV a DNA virus or an RNA virus?

A

RNA virus

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3
Q

How is IBV transmitted?

A

Inhalation/aerosol transmission

-can also be spread by means of contaminated equipment and personnel

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4
Q

What are the CS associated with IBV?

A
  • initially mild respiratory symptoms (sneezing, snicking, gasping, moist rales, nasal discharge)
  • young chicks will huddle under heat source and be depressed
  • decline in egg production and irregularly shaped eggs
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5
Q

What are the CS associated with IBV - nephrotropic strains?

A

-depression, dehydration, and ruffled feathers

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6
Q

What are the lesions with IBV?

A
  • serous/caseous exudate in trachea, hyperemia tracheal mucosa, nasal passages and sinuses
  • cheesy plug found at the bifurcation of the bronchi
  • air sacculitis/pneumonia
  • soft shelled or misshapen eggs with wrinkled shells
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7
Q

Diagnosis of IBV

A
  • tentative diagnosis can be made based off of clinical signs and a rise in IBV antibody titers as measured by ELISA
  • a positive diagnosis requires virus isolation in embryonaged gags, PCR or immunofluorescence in tissue selections.
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8
Q

Treatment for IBV?

A

No specific treatment

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9
Q

Prevention of IBV?

A
  • strict isolation of the farm, all in all out brid movement, and thorough cleaning and disinfection of the poultry house
  • vaccination (several times with a live IBV vaccine prior to onset of laying)
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