title: Chronologic Growth Pattern Of Ascaris lumbrioides.
abstract: The chronologic growth patten of Ascaris lumbricoides was made by the maximum length of worms collected from inhabitants after mass chemotherapy with pyrantel pamoate by various interval; 2-month, 4-month, 6-month an 12-month. The results obtained were summarized as follows: 1. When the collected 497 worms were plotted on weight/length chart by treatment interval, there was always size limitation in each group, permitting the idea of maximal growth in a given period of infection. 2. The maximum lengths in each interval treatment, 2, 4, 6 and 12-month were; 12.5, 16.4, 19.2 and 22.8 cm in male and 14.2, 22.0, 26.2 and 30.8 cm in female respectively. 3. The maximum growth curves were expressed by the equations; Y=9.212 In(X+1)+0.025 in male and Y=11.953 In(X+1)+0.025 in female when X is age in month and Y is length in cm. 4. It was revealed that female grew more rapidly than male. The growth of length was rapid in initial 2~3 months and weigth gain was rapid in later than 2~3 months. The weight seems better than length as an indicator of aging.
authors.affiliation: Department of Parasitology and Institute of Endemic Diseases, College of Medicine, Seoul National University, Korea.
authors.forename: Byong Seol
authors.initials: BS
authors.lastname: Seo
authors.forename: Jong Yil
authors.initials: JY
authors.lastname: Chai