Study on Outer Cell of Moraxella catarrhalis Isolated from Respiratory System Infections by Transmission Electron Microscopy

This study use numbers of Moraxella catarrhalis strains isolated from sputum and swab samples from both sexes of different age patients infected with respiratory system diseases. Aims of study were determine the virulence factors of adherence structures on the outer cell wall of bacteria. Transmission electron microscopy (TEM) by phosphotungstate pigment showed that bacteria posses capsules in 26(86.6%) of strains and most of strains have fimbrae on outer bacterial cell wall but no found in some other strains were detected. Also TEM showed tack-spicules like structure on outer surface of the strains.