Abstract

In a flock of 5000 broiler chicks, approximately 70 chicks were found dead within first 8 days of life showing respiratory signs. On necropsy, most of the birds showed multifocal to coalescing caseous nodules and in some, air sacs were covered with multifocal to coalescing cotton-like light green plaques. Microscopic examination of air sacs and lung lesions showed pyogranulomatous inflammation and presence of intralesional fungi. Fungi were observed on cytological examination and with Grocott's methenamine silver stain (GMS). On basis of clinical signs, gross and microscopic pathology, morphology in hematoxylin and eosin and GMS stains, fungi were diagnosed as Aspergillus spp.

Keywords : 151-162