Enlarged cloacal bursa, infectious bursal disease virus, chicken
Enlarged cloacal bursa, infectious bursal disease virus, chicken
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.