RESUMEN
URTIs are common cause of morbidity in children. Two sampling techniques, oropharynx [OP] and nasopharynx [NP] for detection of upper respiratory tract [URT] pathogenic bacteria were studied. To determine which sample site, NP or Op yields the highest rate of S. pneunoinae, H. influenze, M. catarrhalis, S. aureus and S. pyogenes isolates at different age group. The aim of present study was to evaluate as to which sample site yields the highest rates of bacterial isolates in children with upper respiratory tract infection [URTIs]. The prevalence of potential pathogenic bacteria [S. pneumoinae, H. influenzae, M. catarrhalis, S. aureus and S. pyogenes] from 150 infected children of various ages, >5, 6-10 and 11-15 years were compared in NP and OP samples having URTIs. S. pneumoinae was found equally in both NP and OP sites while H. influenzae, M. catarrhalis, S. aureus were more in OP sample while S. pyogenes was isolated in OP alone