Atrophic cloacal bursa, infectious bursal disease virus, chicken
Atrophic cloacal bursa, infectious bursal disease virus, chicken
Atrophic cloacal bursa, infectious bursal disease virus, chicken

    Gross pathology photograph showing a small, atrophic cloacal bursa (albeit without gross lesions) in a subclinically affected chicken infected with a variant strain of infectious bursal disease virus.

Courtesy of Dr. Daral J. Jackwood.