Vieira J C, Blankespoor H D, Cooper P J, Guderian R H
Department of Clinical Investigation, Hospital Vozandes, Quito, Ecuador.
Trop Med Parasitol. 1992 Dec;43(4):249-52.
To determine whether the human cases of pulmonary paragonimiasis detected in the province of Esmeraldas were autochthonous a total of 1,457 freshwater crabs, species Hypolobocera aequatorialis, were collected from 45 different streams in 4 cantons to determine the rate of parasitisation with metacercariae of Paragonimus mexicanus. Some 28 (62.2%) streams were found to harbour parasitised crabs, with 76.5% of the streams in canton Quininde infected, followed by those in Muisne, 72.7%, Esmeraldas, 62.5% and Eloy Alfaro 22.2%. Of the 1,043 crabs studied from these 28 streams, 42.6% (444) were found to be parasitised with metacercariae: 45.1% of the crabs in the streams in the canton of Quininde, 43.9% in Muisne, 37.4% in Esmeraldas and 13.2% in Eloy Alfaro. There was a positive correlation between the crab parasitisation and the increasing size of their carapace. The results indicate that there is potential active transmission of disease in the four cantons in the province of Esmeraldas and that the human cases detected are probably autochthonous.
为确定在埃斯梅拉达斯省检测到的人体肺吸虫病病例是否为本地病例，从4个县的45条不同溪流中总共采集了1457只赤道低额蟹（Hypolobocera aequatorialis），以确定墨西哥并殖吸虫囊蚴的寄生率。约28条（62.2%）溪流中发现有寄生蟹，基宁德县76.5%的溪流受感染，其次是穆伊斯内县，为72.7%，埃斯梅拉达斯县为62.5%，埃洛伊·阿尔法罗县为22.2%。在从这28条溪流中研究的1043只螃蟹中，42.6%（444只）被发现感染了囊蚴：基宁德县溪流中的螃蟹有45.1%感染，穆伊斯内县为43.9%，埃斯梅拉达斯县为37.4%，埃洛伊·阿尔法罗县为13.2%。螃蟹寄生情况与它们甲壳大小的增加呈正相关。结果表明，埃斯梅拉达斯省的这4个县存在疾病的潜在主动传播，且检测到的人体病例可能是本地病例。
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