Differences of Facial Infection with Demodex spp. Between Indian Students and Native Students in Jiamusi University

Demodex is an ancient pathogen with is a contributor to chronic diseases such as acne rosacea or marginal blepharitis. Recently people found that many kind of diseases correlate with demodex infection, it begin to attract wide interest. At present, we want to evaluate the prevalence of facial infection with demodex spp, among international and local students in Jiamusi University of China. Using skin scraping method to obtain secretions, and then put the secretions to the drop of glycerol on a glass slide. The sample was covered with a cover glass and examined for parasites by light microscopy at 10× and 40× objective. Results showed that the infection rate in foreign students and local students were 15.2% (57/375) and 34.5% (203/588) respectively. There was a statistically significant difference between international students and local students in demodex infection rate (χ 2 = 43.38, P < 0.05). There was a dominance of Demodex folliculorum infection in male of international students and local students, which are 63.6% (28/44) and 69.6% (94/135); followed by Demodex brevis infection, which are 22.7% (10/44) and 22.2% (30/135); last one is mixed infection, which are 13.6% (6/44) and 8.1% (11/135). Interesting, the infection rate of mixed demodex from local female students was the highest in total students. In addition, demodex infected local students with facial symptoms (67.9%) were significantly higher than those showing healthy facial skin (21.5%) (χ 2 = 112.9, P < 0.05). Thus, one can conclude that the probability of Demodex infection is comparable for foreign students and local students unalike, which is related to examination methods, examination season, temperature, living environment, human race possibility