The statistic results showed that the infection vermiform mite number ranging from the most to the fewest on the unit area is on the nose,chin and forehead sequently.

• 用Q检验法比较了额、鼻、颏部蠕形螨两两均数；结果显示；单位面积的蠕形螨感染度以鼻部最多；依次为颏；额.