[Facial Demodex infestation among urban and rural residents in Shangqiu City of Henan Province].

A survey with improved transparent tape method indicated that the prevalence of demodex infestation among 565 urban and rural residents in Shangqiu was 21.2% (120/565). Farmers (32.3%, 53/164) and service employees (33.7%, 29/86) showed higher prevalence than other occupations (P < 0.05). Among age groups, lowest prevalence was found in people under 20 years old (4.8%, 5/105), while the highest in people over the age of 50 (44.4%, 40/90). Prevalence among females, the rural residents and those sharing public toiletries and people with oily skin and acne or other facial sickness was statistically higher than others (P < 0.05). Among the couples with demodex infestation, 79.6% of the couples only had one side infested while both sides got infested in 20.4% of the couples.