Background: The cause of rosacea is unknown; among other factors a causative role has
been postulated for the hair follicle mites Demodex folliculorum and Demodex brevis.
Objective: Our purpose was to compare the population density of Demodex mites in facial
skin of defined categories of patients with rosacea with control subjects. We also assessed
the impact of tetracycline therapy on the mite population. Methods: The population density
and distribution of Demodex mites were studied in the facial skin of 42 patients with rosacea …