All Cooped Up: Coryza

Coryza is akin to a common cold in chickens, but with markedly more dire effects.

All Cooped Up: Coryza
Reading Time: 5 minutes All Cooped Up is a new feature, profiling poultry diseases and how to prevent/treat them, written as a collaboration between medical professional Lacey Hughett and University of Pennsylvania poultry specialist Dr. Sherrill Davison. The facts:  What is it? An upper respiratory infection.   Causative agent: A bacterium called Avibacterium paragallinarum.  Disease onset: 2-3 days, symptoms begin.  Disease duration: 2-3 weeks or longer depending on the severity and if other disease agents are present, such as other bacteria or viruses.  Morbidity: Can be as high as 50% and is highly contagious.  Mortality: Can be as high as 30%.  Signs: Malodorous eye and nose discharge, facial swelling, sneezing, labored breathing, loss of appetite, diarrhea, loss of egg production, and lethargy.  Treatment: Antibiotics. In the U.S., antibiotics must be prescribed by a veterinarian who already has a relationship with the client.   Discharge associated with coryza. Photo courtesy of Dr. Sherrill Davison The scoop:  The A. paragallinarum is a gram-negative rod-shaped bacterium that can only be diagnosed positively if

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