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]

ABSTRACT

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