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Community-acquired methicillin-resistant Staphylococcus aureus infections in discharging ears
Juen-Haur Hwang1, Hung-Yen Tsai, Tien-Chen Liu
1Department of Otolaryngology, Poh-Ai Hospital, Lotung, Taiwan.
Objectives:
Although community-acquired methicillin-resistant Staphylococcus aureus (MRSA) infections have recently become an increasing problem in various fields of medicine, they have rarely been studied in the ear. The purpose of this study was to determine the prevalence of community-acquired MRSA infections in discharging ears and to compare the epidemiology of MRSA with that of other pathogens.
Material And Methods:
Between August 2000 and February 2002, 248 isolates recovered from 221 discharging ears of patients with 3 disease entities (chronic otitis media, acute otitis externa and granular myringitis) were prospectively analyzed using bacteriology. The isolates analyzed using bacteriology were divided into three groups: MRSA, methicillin-susceptible S. aureus (MSSA) and non-SA.
Results:
S. aureus was found in 108 (43.5%) isolates and MRSA in 27. Therefore, the percentage of MRSA among the S. aureus isolates was 25.0% (27/108). The prevalence of community-acquired MRSA infections in discharging ears was 12.2% (27/221) and the MRSA strains were highly susceptible to vancomycin, teicoplanin, fusidic acid and minocycline. The MRSA-infected patients were older than those infected with other groups of pathogens. Also, MRSA infections appeared to be more common in chronic otitis media than in acute otitis externa or granular myringitis.
Conclusions:
Community-acquired MRSA represents an increasing problem. In this study, MRSA strains were highly susceptible to vancomycin, teicoplanin, fusidic acid and minocycline.
Insights
Community-acquired methicillin-resistant Staphylococcus aureus (MRSA) is an emerging issue in ear infections. This study found MRSA in 12.2% of discharging ears, with strains susceptible to common antibiotics.
Area of Science:
- Otolaryngology
- Infectious Diseases
- Microbiology
Background:
- Community-acquired methicillin-resistant Staphylococcus aureus (MRSA) is a growing concern in healthcare.
- Ear infections caused by MRSA have been understudied.
- Understanding the prevalence and characteristics of MRSA in otological infections is crucial.
Purpose of the Study:
- To determine the prevalence of community-acquired MRSA in discharging ears.
- To compare the epidemiology of MRSA with other bacterial pathogens in ear infections.
- To assess the antibiotic susceptibility patterns of MRSA strains isolated from ear infections.
Main Methods:
- Prospective bacteriological analysis of 248 isolates from 221 patients with discharging ears (chronic otitis media, acute otitis externa, granular myringitis) between August 2000 and February 2002.
- Isolates were categorized into MRSA, methicillin-susceptible S. aureus (MSSA), and non-S. aureus groups.
- Epidemiological data and antibiotic susceptibility were evaluated.
Main Results:
- Staphylococcus aureus was identified in 43.5% of isolates, with MRSA accounting for 25.0% of these.
- The overall prevalence of community-acquired MRSA in discharging ears was 12.2%.
- MRSA strains demonstrated high susceptibility to vancomycin, teicoplanin, fusidic acid, and minocycline. Patients with MRSA infections were older and more frequently had chronic otitis media.
Conclusions:
- Community-acquired MRSA is an increasing problem in ear infections.
- MRSA strains isolated from discharging ears exhibit high susceptibility to vancomycin, teicoplanin, fusidic acid, and minocycline.
- Further research into MRSA's role in otological conditions is warranted.