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（十足目：伪束腹蟹科）：厄瓜多尔马纳维省一种新的人体蟹类中间宿主。

(Decapoda: Pseudothelphusidae): A New Crab Intermediate Host of in Manabí Province, Ecuador.

作者信息

Calvopina Manuel, Romero-Alvarez Daniel, Rendon Melina, Takagi Hidekazu, Sugiyama Hiromu

机构信息

OneHealth Group, Escuela de Medicina, Facultad de Ciencias de la Salud, Universidad de las Americas (UDLA), Quito, Ecuador.

Department of Ecology and Evolutionary Biology-Biodiversity Institute, University of Kansas, Lawrence, Kansas, USA.

出版信息

Korean J Parasitol. 2018 Apr;56(2):189-194. doi: 10.3347/kjp.2018.56.2.189. Epub 2018 Apr 30.

DOI:10.3347/kjp.2018.56.2.189
PMID:29742874
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5976022/
Abstract

To determine that sp. is actively transmitted in a tropical area of the Pacific region of Ecuador where human cases of pulmonary paragonimiasis have recently been documented, a total of 75 freshwater crabs were collected from 2 different streams in the Pedernales area of Manabí Province, Ecuador. All collected crabs were identified as based on morphological characteristics of the male gonopods. The hepatopancreas of each crab was examined by compressing it between 2 glass plates followed by observation under a stereomicroscope. Excysted metacercariae were detected in 39 (52.0%) crabs and their densities varied from 1 to 32 per infected crab. There was a positive relationship between crab size and metacercarial density. Sequences of the second internal transcribed spacer region of the ribosomal RNA gene of the metacercariae obtained in this study were identical to those of deposited in the DDBJ/EMBL/GenBank database. Thus, the present study is the first to confirm that the crab species is the second intermediate host of in Manabí Province, Ecuador. Because this crab might be the possible source of human infections in this area, residents should pay attention to improper crab-eating habits related with a neglected parasitic disease, i.e., paragonimiasis.

摘要

为确定在厄瓜多尔太平洋地区的一个热带区域（最近该地区记录到了人类肺吸虫病病例）是否存在某种并殖吸虫的活跃传播，从厄瓜多尔马纳维省佩德内拉莱斯地区的两条不同溪流中总共采集了75只淡水蟹。根据雄蟹生殖肢的形态特征，所有采集到的蟹均被鉴定为某种并殖吸虫。通过将每只蟹的肝胰腺夹在两块载玻片之间，然后在体视显微镜下观察来对其进行检查。在39只（52.0%）蟹中检测到了囊蚴，每只受感染蟹的囊蚴密度从1到32不等。蟹的大小与囊蚴密度之间存在正相关关系。本研究中获得的囊蚴核糖体RNA基因第二内部转录间隔区的序列与保存在DDBJ/EMBL/GenBank数据库中的某种并殖吸虫的序列相同。因此，本研究首次证实了该蟹种是厄瓜多尔马纳维省某种并殖吸虫的第二中间宿主。由于这种蟹可能是该地区人类感染的潜在来源，居民应注意与一种被忽视的寄生虫病即肺吸虫病相关的不当食蟹习惯。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ea5/5976022/c4e9a899b904/kjp-56-2-189f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ea5/5976022/eaca306e07de/kjp-56-2-189f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ea5/5976022/6052e63a5be1/kjp-56-2-189f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ea5/5976022/32ebfb9ddfee/kjp-56-2-189f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ea5/5976022/c4e9a899b904/kjp-56-2-189f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ea5/5976022/eaca306e07de/kjp-56-2-189f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ea5/5976022/6052e63a5be1/kjp-56-2-189f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ea5/5976022/32ebfb9ddfee/kjp-56-2-189f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ea5/5976022/c4e9a899b904/kjp-56-2-189f4.jpg

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