[Bacteriologic evaluation of middle ear fluid during the course of secretory otitis media in children]

Fluid collected from tympanic cavity during operation from 43 children with O.M.S. was subjected to bacteriological examination. After the collection, each sample was immediately applied to Bactec Peds Plus/F liquid medium from Becton Dickinson. The number of samples, where each genus and species of bacteria were found, was determined, as well as the number of samples where every two genus coexisted; also the pH genes, in which each genus was found were calculated. Obtained results showed that 22 species of bacteria, belonging to 6 genus lived in the samples. The most commonly occurring genus were Staphylococcus, Streptococcus and Haemophilus; the most rare genus were Moraxella and Bacillus. The most common species were: Haemophilus influenzae (18.6% of samples), Staphylococcus aureus (14.0%), Staphylococcus epidermidis (11.6%), Staphylococcus warneri (9.3%) and Streptococcus oralis (7.0%). Streptococcus coexisted most frequently with Staphylococcus and Haemophilus; Staphylococcus--with Haemophilus and Bacillus; Haemophilus--with Streptococcus and Staphylococcus. The pH ranges for the three most often found genus were: for Staphylococcus--7.7-9, for Streptococcus--7.7-9.3 and for Haemophilus--8.2-8.8.