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2016年6月,福建省厦门市某中学学生发生不明原因皮疹,共81例病例,其中77例为初二学生,学生的罹患率为4.6%(81/1 753),皮疹主要为前臂部位的红色斑丘疹。流行病学调查结果显示,在学校的芒果树下练习排球垫球(OR=5.1,95%CI:1.8~14.4)是发生皮炎的危险因素,练习垫球后及时清洗手臂具有保护作用(OR=0.4,95%CI:0.2~0.6)。连续湿热雨天后双线盗毒蛾幼虫在芒果树上大量繁殖,并掉落地面,导致学生体育课垫球时接触到毒毛。本次调查未在病例皮疹部位直接找到蛾幼虫毒毛,但根据调查结果推测该起皮炎暴发为芒果树上的双线盗毒蛾幼虫所致。为预防毒蛾幼虫皮炎再次发生,建议学校在毒蛾幼虫繁殖季节对校园内树木开展杀虫工作,并教育学生在毒蛾幼虫繁殖季节不要在树下活动,活动后要及时清洗手臂等暴露部位。
In June 2016, there were 81 cases of unexplained skin rashes in a middle school student in Xiamen, Fujian Province. Among them, 77 were grade two students, and the prevalence of the students was 4.6% (81/1 753). The main rash was the forearm Red rash. Epidemiological survey results showed that practicing volleyball mats (OR = 5.1,95% CI: 1.8-14.4) under the school mango tree was a risk factor for dermatitis. It was found that the protective effect of timely cleaning of the arm after the ball cushion was practiced (OR = 0.4, 95% CI: 0.2-0.6). After continuous hot and humid rain, the double-larvae of moth moth larvae multiply in the mango trees and fall to the ground, causing the students to come into contact with the poisonous hairs when pilling the ball in the PE class. The survey did not find moth larvae directly in the rash site, but according to the survey, it was speculated that the dermatitis outbreak was caused by the larva of double-larvae on the mango tree. In order to prevent the recurrence of dermatitis in larvae of moths, it is recommended that schools should carry out insecticidal activities on the trees in the campus during the breeding season for larvae of moths and educate them not to move under trees during the larval season of larvae. Clean the exposed parts such as the arms after the activity.