الفهرس 
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Abstract
Camels are important in the livestock economy by their adaptability to adverse environmental conditions as they are good sources of protein and income for developing countries. Studies conducted on the bacterial flora of the respiratory tract in camels is very rare and with fewer studies on the apparently normal nasal passage. This study was carried out on 98 camels. These camels were selected from different abattoirs at three different Egyptian governorates (Cairo, Giza& El sharkia). The collected samples were blood, nasal swabs, tracheal swabs and lung samples. Seventy-nine isolates were obtained. The most frequently isolated species was staphylococcus aureus (14.5 %), while Pseudomonas aeruginosa and Bacillus spp. were the second dominant bacteria (11.0 %) and (10.8 %) respectively. The lowest rate of isolation achieved by E. coli (3 %) and Klebsiella spp (0.5%). The isolation of Staphylococcus aureus and Pseudomonas aeruginosa from the respiratory tract of camels in this work reflects their potential role in most common respiratory diseases encountered in camels.