identification of isolated fungi from different lesions of birds with aspergillosis referred to mycology research center, faculty of veterinary medicine, university of tehran(1991-2003)

in this study , the samples of 263 birds suspected to aspergillosis were examined by direct microscopy, culture and histopathological methods . of 263 affected birds , 185 (85.3%), 23 (79.3%), and 12 (70.6%) were infected to pulmonary , ocular , and skin aspergillosis , respectively. the most frequent aspergillus species were a. fumigatus (70.4%) , and then a. flavus (22.7%) , a.niger (3.6%) , a. terreus (2.3%) , and a. ustus (0.9%) . chickens were the most affected birds(85%) . aspergillus flavus was the most frequent pathogenic isolate in canary (61.5%) . young birds were most involved with pulmonary lesions (96.1%) , whereas the ocular and skin lesions were mainly observed in adults . regarding to high prevalence of different aspergillus species in the environment and contaminated feedstuffs , it should be considered to plan a program , to prevent the growth of these pathogens in breeding poultry .