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Article
November 1988

Staphylococcus epidermidis and Staphylococcus aureus in Otitis Media With Effusion

Author Affiliations

From the Department of Otolaryngology, Medical College of Oita (Japan).

Arch Otolaryngol Head Neck Surg. 1988;114(11):1262-1265. doi:10.1001/archotol.1988.01860230056023
Abstract

• Bacteriologic investigation of middle ear effusion (MEE), external ear canal, and the nasopharynx was carried out on 458 patients with otitis media with effusion. Staphylococcus epidermidis was the most common bacteria in MEE, even after excluding the contaminants from the external ear canal, which had the same value of minimal inhibitory concentration as the paired MEE. The bacterial agreement of S epidermidis between MEE and the nasopharynx was extremely rare in contrast with Haemophilus influenzae, Streptococcus pneumoniae, and Branhamella catarrhalis, although the organism was also frequently isolated from the nasopharynx. Staphylococcus aureus, having the same minimal inhibitory concentration as that in the nasopharynx, was more frequently found in MEE than S epidermidis. The results suggest that S epidermidis found in MEE is not a pathogen, but rather a contaminant in many instances. Staphylococcus aureus seems to be a causative agent in otitis media with effusion.

(Arch Otolaryngol Head Neck Surg 1988;114:1262-1265)

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