Saksirisampant W, Kulkaew K, Nuchprayoon S, Yentakham S, Wiwanitkit V
Department of Parasitology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
Ann Trop Med Parasitol. 2002 Mar;96(2):191-5. doi: 10.1179/000349802125000295.
The livers were separated from the viscera of 2738 swamp eels (Monopterus alba) purchased from Klong Toey market, the largest market in Bangkok, between June 1999 and May 2000. When these livers were digested in artificial gastric juice, 524 (19.1%) were found to be infected with the human-infective, third-stage larvae (L3) of Gnathostoma spp. All the identified larvae were confirmed morphologically to be G. spinigerum. Prevalence of the infection varied with season, from a high of 38.3% in September to a low of 7.0% in April, being generally high during the rainy season and winter (June-February). The mean (S.E.) number of L3 recovered/infected liver, which was 3.99 (0.52) overall, also varied with the season, peaking at 5.38 (1.89) in January, but the month-on-month variation was not statistically significant. Although the results of an earlier study had indicated that the prevalence of eel infection decreased in November, after the rainy season, the most abrupt decrease observed in the present study occurred at the beginning of summer (March). However, the period covered by the present study was unusually wet, and the prevalence of eel infection may depend on rainfall more than season.
1999年6月至2000年5月期间，从曼谷最大的市场空堤市场购买了2738条黄鳝（黄鳝），将其肝脏与内脏分离。当这些肝脏在人工胃液中消化时，发现524条（19.1%）感染了颚口线虫属的人感染性第三期幼虫（L3）。所有鉴定出的幼虫经形态学确认均为棘颚口线虫。感染率随季节变化，9月份最高，为38.3%，4月份最低，为7.0%，雨季和冬季（6月至2月）通常较高。每只感染肝脏中回收的L3平均数量（标准误）总体为3.99（0.52），也随季节变化，1月份达到峰值5.38（1.89），但逐月变化无统计学意义。尽管早期研究结果表明，雨季过后的11月份鳗鱼感染率有所下降，但本研究中观察到的最急剧下降发生在夏季开始时（3月份）。然而，本研究涵盖的时期异常潮湿，鳗鱼感染率可能更多地取决于降雨量而非季节。
