Abstract: 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 occuptions （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.

Key words: Demodex, Prevalence, Shangqiu City