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Correlation between serum reactivity to Demodex-associated Bacillus oleronius proteins, and altered sebum levels and Demodex populations in erythematotelangiectatic rosacea patients.

J Med Microbiol. 2013 Nov 18;

Authors: Jarmuda S, McMahon F, Zaba R, O'Reilly N, Jakubowicz O, Holland A, Szkaradkiewicz A, Kavanagh K

Abstract
Rosacea is a chronic inflammatory condition that affects the skin of the face and the eyes. The etiology of rosacea is not clearly established but increasing evidence suggests a potential role for bacteria in the induction of the condition. A role for Bacillus oleronius, originally isolated from within a Demodex folliculorum mite, in the etiology of the condition has been suggested. The aim of the study was to determine whether a correlation existed between the level of sebum and the density of D. folliculorum in the skin of erythematotelangiectatic rosacea patients, and the reactivity of these patient's sera to proteins of B. oleronius. Serum reactivity to the 62 and 83 kDa B. oleronius proteins was found in 82.6% (62/75) of the rosacea patients and in 26.9% (14/52) of controls (p = 0.0016). In the group of rosacea patients whose sera reacted to B. oleronius proteins, the level of sebum was statistically lower than in controls (p = 0.01). The density of D. folliculorum on the face of Bacillus positive rosacea patients was statistically higher compared to controls (p = 0.0001). Rosacea patients demonstrated increased Demodex populations on their faces and reduced sebum levels. Their sera also showed reactivity to B. oleronius proteins suggesting a potential role for this bacterium in the etiology of rosacea.

PMID: 24248990 [PubMed - as supplied by publisher]

http://www.ncbi.nlm.nih.gov/pubmed/24248990?dopt=Abstract = URL to article