To investigate the demodex infection in students living on campus in one university.

Samples from different face parts of college students were obtained with transparent adhesive tape method from November 2016 to April 2017. Questionnaire on skin disease was performed simultaneously.

Among the selected 948 students, 516 students (54.43%) were infected, of which 56.20% were males and 53.33% were females. There was no significant difference in infection rate between males and females (P>0.05). Demodex folliculorum and demodex brevis invaded the 516 infected students, accounting for 41.86% and 28.49% individually, 29.65% of them were with mixed infection. Infectiosity was classified as grade Ⅰ(84.30%), grade Ⅱ(9.88%), grade Ⅲ (4.07%) and grade Ⅳ(1.74%). Infection rates of nose (48.84%) and forehead (44.77%) were higher than that of cheek (36.05%) or genial region (29.65%). The infection rate of facial dermatosis group (59.84%) was higher than that of patients without facial disease (50.79%, P<0.01).

Demodex infection rate is high among college students living on campus. Demodex folliculorum infection was the main type demodex infection, which manifests mild symptoms with. Nevertheless, nose and forehead are more susceptible to be infected with demodex than cheek or genial region. Additionally, demodex infection is closely correlated with facial skin disease.

Demodex; Infection rate; College students