title: Correlation between serum reactivity to Demodex-associated Bacillus oleronius proteins, and altered sebum levels and Demodex populations in erythematotelangiectatic rosacea patients.
abstract: Rosacea is a chronic inflammatory condition that affects the skin of the face and the eyes. The aetiology 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 aetiology 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 patients' 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 than 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 aetiology of rosacea.
authors.affiliation: Department of Dermatology and Venerology, University of Medical Sciences, Poznań, Poland.
authors.forename: Stanisław
authors.initials: S
authors.lastname: Jarmuda
authors.affiliation: Department of Biology, National University of Ireland, Maynooth, Co. Kildare, Ireland.
authors.forename: Fred
authors.initials: F
authors.lastname: McMahon
authors.affiliation: Department of Dermatology and Venerology, University of Medical Sciences, Poznań, Poland.
authors.forename: Ryszard
authors.initials: R
authors.lastname: Żaba
authors.affiliation: Department of Biology, National University of Ireland, Maynooth, Co. Kildare, Ireland.
authors.forename: Niamh
authors.initials: N
authors.lastname: O'Reilly
authors.affiliation: Department of Dermatology and Venerology, University of Medical Sciences, Poznań, Poland.
authors.forename: Oliwia
authors.initials: O
authors.lastname: Jakubowicz
authors.affiliation: Department of Biology, National University of Ireland, Maynooth, Co. Kildare, Ireland.
authors.forename: Ashling
authors.initials: A
authors.lastname: Holland
authors.affiliation: Department of Medical Microbiology, University of Medical Sciences, Poznań, Poland.
authors.forename: Andrzej
authors.initials: A
authors.lastname: Szkaradkiewicz
authors.affiliation: Department of Biology, National University of Ireland, Maynooth, Co. Kildare, Ireland.
authors.forename: Kevin
authors.initials: K
authors.lastname: Kavanagh
mesh_terms: D000053:Acari / Q000254:growth & development* / Q000382:microbiology*; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000818:Animals; D000907:Antibodies, Bacterial / Q000097:blood*; D001407:Bacillus / Q000276:immunology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012393:Rosacea / Q000382:microbiology / Q000469:parasitology / Q000473:pathology*; D012629:Sebum / Q000378:metabolism*; D055815:Young Adult
chemical_list: D000907:Antibodies, Bacterial