الفهرس 
Title : Molecular epidemiological studies on avian influenza (H9N2) and infectious bronchitis (IB) viruses affecting respiratory system in chickens in Lebanon
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Abstract
Avian influenza and infectious bronchitis viruses are pathogens with economic importance in poultry industry. To determine the role of these viruses in respiratory diseases outbreak in Lebanese poultry farms, 347 serum samples from 26 flocks with respiratory disease symptoms were examined by ELISA tests. Some of these flocks had received influenza A and infectious bronchitis viruses{u2019} vaccines. The overall antibody titers and of AIV H9 subtype and infectious bronchitis viruses were recorded. The results revealed the presence of both viruses in some flocks at the same time