الملخص

ABSTRACT Klebsiella pneumoniae were isolated in a percentage of (20%) of rhinitis which the identification tests were carried done. The tests for virulence factors that could be produced by these spesies were also done and resugts showed that all spesies have the ability of serum resistance, successful adhesion on respiratory epithelial surfaces, heamagglutination of RBCof human, rabbit, sheep, capsule production, and the Lipopolysaccharides which isolated from bacteria have toxic effect on laboratory mice when injected in peritoneum