In vitro efficacy of the successive or staggered use of eardrops

[Correlation between histomorphometric changes and the type of aerobic bacteria isolated in chronic suppurative otitis media]

BACKGROUND/AIM

Bacterial flora is a very important factor in pathogenesis of chronic suppurative otitis media (CSOM) and significantly influences the type and intensity of osteolytic process. There are few histomorphometric investigations of middle ear mucosa in chronic otitis. The aim of this study was to identify aerobic bacteria responsible for chronic suppurative otitis media as well as their association with histomorphometric changes of middle ear mucosa.

METHODS

A prospective study that comprised 153 patients treated in the Clinc for Ear, Thorat and Nose Diseases, Nis, was conducted. Bacteriologic analysis of diseased ear secretion was carried out in all patients. Intraoperatively removed granulation tissue was used for histomorphometry. The analysed parameters were: the number of inflammatory cells, as well as vascularization and vasodilatation.

RESULTS

The most frequently isolated aerobic bacteria from chronic suppurative otitis media were Staphylococcus aureus (29.020/0), Pseudomonas aeruginosa (29.02%) and Proteus spp. (21.76%). There was no correlation between the type of pathologic process and the type of bacteria. The number of inflammatory cells in the granulation tissue in pure cultures of Staphylococcus aureus was 1,597.33 +/- 549.45 and in Pseudomonas aurzginosa cultures was 2639 +/- 648.

CONCLUSION

This study showed that there is a statistically significant correlation between the number of inflammatory cells in the granulation tissue and the type of aerobic bacteria we isolated. The intensity of the infection in chronic suppurative otitis media depends on the type of the isolated bacteria, which emphasizes the importance of adequate preoperative antimicrobial therapy.

Bacteriology of chronic suppurative otitis media--a multicenter study

CONCLUSIONS

Bacterial predominance and antibiotic sensitivity have changed over time, making continuous and periodic surveillance necessary in guiding appropriate antibacterial therapy.

OBJECTIVES

With the development and widespread use of antibiotics, the types of pathogenic microorganisms and their resistance to antibiotics have changed. Knowledge of the species and resistance rates of current pathogens is important for determining the appropriate antibiotics for patients with chronic suppurative otitis media. We investigated the current bacteriology of chronic suppurative otitis media.

SUBJECTS AND METHODS

This was a retrospective study of 1102 patients with chronic suppurative otitis media seen at six hospitals in Korea from January 2001 to December 2005.

RESULTS

The most commonly identified pathogenic bacterial species was Pseudomonas, with the next most prevalent being methicillin-resistant Staphylococcus aureus (MRSA).