quantification of middle ear pathogens ( s. pneumoniae , h. influenzae and b. catarrhalis ) and potential pathogens ( s. aureus and coagulase-negative staphylococci ) adhering to the posterior wall of the nasopharynx was performed in 20 patients of whom 5 were suffering from secretory otitis media ( som ) , 5 from recurrent attacks of acute otitis media ( raom ) , 5 from attacks of upper respiratory infection ( uri ) and 5 from blocked nose ( bn ) .
C0013455
middle ear
C0029883
secretory otitis media