Asian J Beauty Cosmetol. 2009; 7(4): 281-292.

A Study about Parasitism Ratio and Relative Variables of Demodex Folliculorum

In The goals of this study are to identify the ratio of Demodex folliculorum. parasitism for persons with hair loss vs. persons with no hair loss, to investigate the possible relative variables of D.folliculorum. have with the personal traits of those with hair loss, and to conduct a survey on the current parasitism ratio, a questionnaire survey. The survey on the current ratio of D.folliculorum parasitism was conducted among 76 persons with hair loss and 72 with no hair loss, the questionnaire survey was conducted among 502 customers who had used hair & scalp treatment center. The whole study was conducted from Feb 15, 2006 through Jun. 20, the same year. The D.folliculorum parasitism ratio of those with hair loss was about three times higher than that of those with no hair loss, and D.folliculorum parasitic among the two groups according to age showed astatistically significant difference. However, D.folliculorum parasitic in men (50%, 48/96) vs. women (40.4%,21/52) showed no statistically significant difference. The study showed that as the subjects were older, the parasitic rate became higher, and a number of the occurrences of D.folliculorum were found on oily scalps. It was also found that, as the cycle of washing hair got shorter, the parasitism ratio became lower. However, D.folliculorum parasitism at p<0.05 in regards to sex, a family and relatives' history of hair loss and the types of shampoos used showed no statistically significant difference.

Keywords : Demodex folliculorum, Hair loss, Persons with no hair loss, Parasitism ratio, Oily scalp