| The study includes isolation and identification of causative agent bacteria cause chronic sinusitis. Specimen were collected from out patients of Tikrit hospital during the period from the start July to the end Augst, 2009. the percentage isolation was 96% and 4% not isolation any type of the bacterial.36 (75)% from sum 48 positive specimen was mixed infection where isolated more from types of the bacterial.31(29.88) bacteria isolates belong to Saphylococcus aureus were isolation from sum104 isolates.25(24)%, bacteria isolates Streptococcus pnemoniae, 23(22.12)bacteria isolates Saphylococcus epidermidis,13(12.5)bacteria isolates pseudomonas areugenosa, 12(11.5) bacteria isolates Bacillus cereus, also the research includes study isolate sensitivity bacterial toward Antibiotic areAzithromycin, Doxycyclin, Tetracyclin, Vancomyclin, Sulfatrimethoprimpencilin, Cefuroxime, Erythromycin. The results show all isolates were resistance toward most antibiotics sensitivity which used and the antibiotic is the best effect was Azithromycin. the results show that all isolates Saphylococcus aureus, Streptococcus pnemoniae were resistance with the percentage (100%)t0 Vancomyclin, Sulfatrimethoprim, pencilin, Cefuroxime,and susceptible(100%) to are Azithromycin, Doxycyclin, Tetracyclin, Erythromycin.while show Saphylococcus epidermidis Bacillus cereus resistant with the percentage(100%).to Vancomyclin, Sulfatrimethoprim, pencilin, Cefuroxime, Erythromycin. and susceptible(100%) to are Azithromycin, Doxycyclin, Tetracyclin. pseudomonas areugenosa show resistance Doxycyclin, Tetracyclin, Erythromycin, pencilin, Cefuroxime, Erythromycin. Sulfatrimethoprim, and susceptible (100%) to Azithromycin. |