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Enlarged cloacal bursa, infectious bursal disease virus, chicken
enlarged-cloacal-bursa-infectious-bursal-disease-virus-chicken-blakey-sized
Enlarged cloacal bursa, infectious bursal disease virus, chicken

    Gross pathology photograph showing an enlarged, hemorrhagic cloacal bursa in a chicken infected with very virulent infectious bursal disease virus. This strain of the virus can also cause hemorrhages in skeletal muscles.

Courtesy of Dr. Daral J. Jackwood.