作者在16个月的时間內对山梨縣松澤的居民蛔虫病的季節消長進行了研究。儿童和成人中的發病率和感染度基本上是相同的。夏季高峯后不断下降,至12月發病率和寄生虫負荷达到最低点。以后又逐渐上昇,直至夏季高峯。春季感染度的暂时下降在发病率曲綫中未曾表示出。儿童中寄生虫負荷高峯的时間看来比該组发病率高舉稍晚一些。曲 The authors studied the seasonal fluctuation of ascariasis in Songze, Yamanashi Prefecture within 16 months. The incidence and prevalence in children and adults are essentially the same. After the summer peak continued to decline, to December morbidity and parasitic load reached the lowest point. And then gradually increased until the summer peak. The temporary drop in spring infectivity was not shown in the incidence curve. The time when the parasites load peaked in children appeared to be slightly later than the group’s incidence. song