الفهرس 
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Abstract
aAtotal of 2I buffalo and cattle calves and their age between C one day up to 4 months old ) were subjected to these studies •Some of them showed clinical symptoms end others were apparently healthy • The latter cases were taken as control .Samples were taken by swabing from the nasal , laryngeal cavities of animal with clinical symptoms end from others which apparently healthy .Bacteriological examination for the swabs from the nasal cavity and identified of the bacteria isolated by biochemical tests obd serological test was done to identify the E. coli which isolated
And so Mycological examination for the swabs and identify of the fungus and pathogenicity for detection the pathogenic effect of the fungus
I— The bacterial flora of respiratory tract isolated from nasal swabs :Staph. aureus ,Staph. elbus, Streptococcus, E coli ,Pyocynas ,Pasteurella app.
2 —The fungus were isolated from nasal swabs of respiratory tract were : Asperigillus spp. A. fumigetus , A. flavus, A. nidulans, A. niger , A. terrus ,Mucor app. ,Rhizopus app. , Penicillium app. , P. notatum , Demetaciae spp. , Clodosporiuiu werenkii, Botryris ceneria, Sporotrichium shenkii ,Alternia spp. , Blatomyces dermatidis , Hormodernum app. , Candida app. Humicola app.
3.:Sensitivity test were done on idoleted bacteria ,
yeast and fungi to show the suitable tybe of treatment ,