中国寄生虫学与寄生虫病杂志 ›› 1999, Vol. 17 ›› Issue (4): 7-214.

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并殖吸虫中间宿主感染与其生态环境的关系

程由註
  

  1. 福建省寄生虫病防治研究所 福州 350001
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-08-30 发布日期:1999-08-30

STUDIES ON THE RELATIONSHIP BETWEEN THE INFECTION OF INTERMEDIATE HOSTS OF PARAGONIMUS AND ECOLOGICAL ENVIRONMENT

CHENG Youzhu

  

  1. Fujian Provincial Institute of Parasitic Diseases;Fuzhou 350001
  • Received:1900-01-01 Revised:1900-01-01 Online:1999-08-30 Published:1999-08-30

摘要:   目的: 探讨并殖吸虫中间宿主感染与其生态环境关系。方法: 选择福建省具有代表性地理地貌的卫氏并殖吸虫与斯氏狸殖吸虫流行区设点( 村) , 调查螺、蟹宿主感染及与感染相关的自然环境因素; 采检螺、蟹,以不同孳生环境螺的尾蚴阳性率与阳性蟹的囊蚴平均感染度进行比较。结果: 在岭阳村, 溪流型水流缓慢的Ⅰ段溪蟹的卫氏并殖囊蚴感染度为7239 个/ 只, 比水流较急的坑沟型Ⅱ段溪的1426 个/ 只高出5 倍; 在溪口村,1996 年放逸短沟蜷螺尾蚴阳性率与溪蟹卫氏并殖囊蚴感染度分别为4 . 9 % 与1 7383 个/ 只, 比1982 年的02 %与2047 个/ 只分别高出289 倍与85 倍; 在氵示上村, 常年渗水洼地流水浅水坑Ⅲ号沟拟钉螺尾蚴阳性率与溪蟹斯氏狸殖囊蚴感染度分别为43 % 与3554 个/ 只, 比同一水系的Ⅱ号沟的1 % 与429 个/ 只分别高出43 与83倍。结论: 卫氏并殖吸虫分布有一定的水系特征, 以水流缓慢小型水体处感染率居高。斯氏狸殖吸虫通常无明显水系分布特点, 而微型水体分布特征更为突出。适宜螺与蟹孳生的微型环境, 也是并殖吸虫完成其生活史循环适宜场所。对第一中间宿主的选择性及对生态环境的适应性,

关键词: 并殖吸虫, 螺, 蟹, 宿主, 微型生态环境

Abstract:  AIM: To explore the relationship between the infection of the intermediate hosts of Paragonimus and their ecological environment.METHODS:Three different villages in Fujian Province were chosen to conduct the study.The infection of snails and crabs were surveyed.RESULTS:① In Ningyang Village, Wuyi mountain(stream type),the infection rate of the Potamon crabs (723.9/each) in section Ⅰ(rapid stream) was 5 times higher than that in section Ⅱ(rapid stream) 142.6/each. ② In Xikou Village, Mingching county( ditch type): The infection rate of the snails (Semisulcospira libertina ) to cercaria and the Potamon crabs were 4.2% and 1 738.3/each, respectively in 1996, being 28.9 and 8.5 times higher than those ( 0.2% and 204.7/each) in 1982.③ In Jishang Village, Jianou City,the infection rate of the snails ( Tricula ) and the Potamon crabs were 4.3% and 355.4/each respectively in ditch Ⅲ, 4.3 and 8.3 times higher than those (1% and 42.9%/each) in ditch Ⅱ.CONCLUSION: P.westermani distributed along the stream system, usually concentrating in the small, slow-running water bodies of the stream. P.skrjabini distributed in still smaller water bodies.The environment suitable for the breedings of the snails and crabs are also the suitable places for Paragonimus parasites to complete their life cycles.

Key words: Paragonimus, snail, crab, host, small ecological environment