昆明某高校学生蠕形螨感染情况调查

目的　了解昆明医科大学在校学生蠕形螨感染情况及其对蠕形螨的认知情况，分析蠕形螨感染的相关影响因素，为大学生预防蠕形螨感染提供参考依据。方法　以昆明医科大学2014级必修《医学寄生虫学》课程的学生为调查对象。采用透明胶纸法对学生面部蠕形螨进行取样，显微镜检查并鉴定虫种，同时就性别、民族、生源地、皮肤类型等方面进行问卷调查。结果　共调查1 463人，蠕形螨阳性279名，总感染率为19.07%(279/1 463)，男生和女生蠕形螨感染率分别为16.05%(96/598)和21.16%(183/865)，差异有统计学意义([χ2] = 5.965，P < 0.05)。彝族、白族等少数民族学生蠕形螨感染率为18.33%（66/360），不同民族蠕形螨感染率差异无统计学意义（P > 0.05）。感染类型以毛囊蠕形螨为主，感染率为50.54%(141/279)；感染程度以轻度为主，占96.77%(270/279)，无重度感染者。多因素非条件logistic回归分析显示，性别及舍友有蠕形螨感染是蠕形螨感染的危险因素，蠕形螨感染与民族、生源地、皮肤类型等无关。仅有2.53%(37/1 463)的学生了解蠕形螨相关知识。结论　昆明医科大学在校大学生面部蠕形螨感染率相对较低，感染与性别及舍友有蠕形螨感染密切相关。要加大在学生中开展卫生保健知识宣传的力度。

Investigation on Demodex infections among university students in Kunming City

Objective　To investigate the prevalence of Demodex infection among students in Kunming Medical University, and identify the factors affecting Demodex infections, so as to provide the evidence for the development of the strategy for the prevention of Demodex infections. Methods　A total of 1 463 students from Grade 2014 who studied Medical Parasitology in Kunming Medical University were included in the survey. Demodex was examined in students’ facial skin using the cellophane tape method, and the species was identified using microscopy. The students’ gender, ethnicity, place of origin and skin type were captured using a questionnaire survey. Results　The overall prevalence of Demodex infections was 19.07% (279/1 463) on the facial skin among the university students, and a higher prevalence was seen in girls (21.16%, 183/865) than in boys (16.05%, 96/598)([χ2] = 5.965, P < 0.05). The prevalence of Demodex infections was 18.33% (66/360) among minor ethnic students, and no ethnicity?specific prevalence was seen (P > 0.05). Demodex folliculorum was the predominant species, with a prevalence of 50.54% (141/279), and mild infections were predominant among all infections (96.77%, 270/279), without severe infections seen. Multivariate non?conditional logistic regression analysis revealed that gender and roommates with Demodex infections were risk factors of Demodex infections, and the infection was not associated with ethnicity, place of origin or skin type. There were only 2.53% (37/1 463) of the subjects understanding the knowledge pertaining to the prevention and control of Demodex infection. Conclusions　A relatively low prevalence of Demodex infection is detected in the facial skin of students from Kunming Medical University, and Demodex infection is associated with gender and roommates with Demodex infections. Health education pertaining to the prevention of Demodex infections is suggested to be intensified among university students.