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Infectious Coryza in Poultry

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Questions and Answers

What is the purpose of incubating the culture in a candle jar?

To prevent contamination of the culture
To provide a warm and humid environment for the culture (correct)
To promote the growth of satellite colonies
To create an anaerobic environment for the culture

Why is it important to leave the premises vacant for two to three weeks after thorough cleaning and disinfection?

To prevent recontamination from any remaining A.paragallinarum antibodies
To allow time for the development of resistance in the new chicken stock
To eliminate all carrier birds from the premises
To allow for the removal of any residual bacteria or viruses (correct)

What is the purpose of using hemagglutination inhibition and immunodiffusion tests?

To determine the serotype of A.paragallinarum antibodies in serum (correct)
To detect the presence of A.paragallinarum in sinus exudate
To identify carrier birds in the flock
To diagnose the severity of avian coryza

Why should pullets on multiage infected farms receive two injections of the bacterin at 4-week intervals?

<p>To immunize them against different serotypes included in the vaccine (C)</p> Signup and view all the answers

Why are erythromycin and oxytetracycline commonly used in layer operations?

<p>To alleviate the severity of avian coryza in affected birds (D)</p> Signup and view all the answers

Flashcards

Candle jar incubation purpose

Provides a warm, humid environment for the culture.

Post-disinfection waiting period?

Two to three weeks to remove residual bacteria/viruses

Hemagglutination & Immunodiffusion tests for?

Identifying the type (serotype) of A.paragallinarum antibodies in serum.

Pullet vaccination schedule

Two injections of bacterin at 4-week intervals to protect against different serotypes.

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Erythromycin/Oxytetracycline use in layers?

Treats avian coryza in birds.