Results: The common pathogenous bacteria in upper respiratory tract infections were Streptococcus pneumoniae (31.25%), consequently Staphylococcus aureus (26.56%), Haemophilus influenzae and Pseudomonas aeruginosa were isolated in 17.18%; Streptococcus pyogenes and Neisseria menigitidis was less frequent (6.27% and 1.56%).