Sir, Demodex mites are common ectoparasites of human skin (1). Two species, Demodex folliculorum and the smaller D. brevis, inhabit the human pilosebaceous unit and are found in individuals of all ages except neonates. They inhabit almost every area of human skin but show a predilection for the face, especially the nose and nasolabial folds. Cases in which demodicidosis developed on other sites...

A 53-year-old man had a 6-week history of confluent erythematous papules, pustules, and abscesses of the face initially limited to the right nasolabial fold. Histologic investigation revealed a perifollicular infiltrate with lymphocytes, histiocytes, and many Demodex folliculorum mites. A large number of mites were seen in skin scrapings. The skin manifestations progressed and persisted for the...

Papulopustular rosacea (PPR) is a common facial skin disease, characterized by erythema, telangiectasia, papules and pustules. Its physiopathology is still being discussed, but recently several molecular features of its inflammatory process have been identified: an overproduction of Toll-Like receptors 2, of a serine protease, and of abnormal forms of cathelicidin. The two factors which stimula...

© 2012 The Authors. doi: 10.2340/00015555-1200 Journal Compilation © 2012 Acta Dermato-Venereologica. ISSN 0001-5555 Demodex mites may play a pathogenic role when present in excessive numbers or when penetrating into the dermis. There are two types of mites. Demodex folliculorum is usually found in the follicular infundibulum, and D. brevis in sebaceous ducts and meibomian glands (1, 2). Pityri...

OBJECTIVE Demodex folliculorum and Demodex brevis can cause different skin and eye symptoms. There are indications showing that the prevalence of these parasites is higher in public places. In this direction, the study was aimed to determine the prevalence of demodex in university students, inhabiting in dormitories. METHODS The study consisted of 300 men and women, college students who were ...

ated, he proposed that the life cycle of D. folliculorum mites was about 14.5 days. He also demonstrated that all life stages of these mites were negatively phototaxic, that is they were more mobile in a dark environment and relatively inert when bright light was shone on them. However, until optimal in vitro culture techniques and conditions allow Demodex proliferation in the laboratory, the t...

ated, he proposed that the life cycle of D. folliculorum mites was about 14.5 days. He also demonstrated that all life stages of these mites were negatively phototaxic, that is they were more mobile in a dark environment and relatively inert when bright light was shone on them. However, until optimal in vitro culture techniques and conditions allow Demodex proliferation in the laboratory, the t...

Introduction Two human-specific Demodex species have been described: Demodex folliculorum and Demodex brevis. A medical condition caused by the presence of Demodex is called demodicosis. Material and methods The study material comprised eyelashes collected from 1499 patients. Results Demodex sp. infection was revealed in 47% of patients (487 women and 216 men). We determined the following r...

Pathophysiology Rosacea results from an inflammatory process about which little is known. The stimulus includes a wide variety of foods as well as environmental, chemical, psychologic, and emotional factors (Table 1). It is unclear what role, if any, these factors have in the causation or exacerbation of this condition. In particular, the link between emotional stress and rosacea is not well un...