75 cases of atrophic rhinitis were studied bacteriologically. Klebsiella species was the commonest (26.66%) isolate Klebseilla ozaenae and Pseudomonas aeruginosa each were isolate in 17.33% of cases. In 22.66% cases multiple bacteriae were isolated. Klebsiella and pseudomonas in combination were the commonest. The culture was found to be sterile in 7.52% cases.