Some aspects of the skin infestation by Demodex folliculorum. The importance of demodicids (Demodex folliculorum and D. brevis) infestation and their effect on skin lesions has been described based on literature data and our own clinical and parasitological investigations. Hair follicie mites have been detected in 45% of patients with rosacea, 27% of patients with perioral dermatitis, 28% of patients suffering from seborrhoeic dermatitis and in 3 out of 7 patients with chronic blepharitis. Clinical picture of demodecosis included erythemato-papulous and pustulous (rosacea-like) skin lesions together with erythemato-desquamative changes of the face.
Group of 529 patients, inhabitants of Szczecin, was examined for the presence of Demodex spp. in eyelid hair follicles. The incidence of infestation increased with age. High extensity of infection by Demodex spp. - 44%-86% - was noted in age groups: 17-25, 26-34 and over 35 years. In group of subjects 26-34 years and older were noted 46%-80% of symptomatic infestation cases.