Abstract
A total of 250 broiler chicken heads from 10 (A-J) farms were examined in April to June 1996 grossly, revealing caseous exudate within the air spaces of cranial bones and middle ears in 3 chickens of farm A and 2 each of farms B and C. Histopathologically, granulomatous lesions with foreign body-type giant cells were obseved in the air spaces of cranial bones and middle ears, suggesting that the lesions might be of chronic or recovery phase of the swollen head syndrome (SHS).
