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In which rosacea patients should Demodex in the eyelashes be investigated?

Niger J Clin Pract. 2020 Aug;23(8):1039-1043

Authors: Ogrum A, Alim S

Abstract
Aim: The aim of this study was to investigate the relationship between the presence of Demodex on the face and within the eyelash follicles in patients with rosacea.
Subjects and Methods: This prospective cross-sectional study included 80 participants, 40 patients with rosacea and 40 individuals with no rosacea as controls. The presence of Demodex on the face was assessed by standard superficial skin biopsy. Sixteen eyelashes were epilated from each patient and control.
Results: The rate of Demodex infestation and severe infestation on the face in patients with rosacea was significantly higher than the control group. Demodex count within the eyelash follicle was significantly higher in patients with erythematotelangiectatic type rosacea than the control group. There was no increase in blepharitis in rosacea patients but when blepharitis was present, the rate of the presence of Demodex was higher in this group. There was a statistically significant relationship between the presence of Demodex within the eyelashes and itchy eyes in people without blepharitis.
Conclusion: When at least one Demodex is found on the face in rosacea patients, the eyelashes should be examined for effective treatment of the mite. Itchy eyes may be an important sign of the presence of Demodex in people without blepharitis.

PMID: 32788478 [PubMed - as supplied by publisher]

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