Noudeh Maboud Alizadeh, Pazooki Jamileh
Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, G.C. Evin, Tehran, Iran
Ann Parasitol. 2019;65(4):365–370. doi: 10.17420/ap6504.222.
As a matter of fact, there has not been any reportage of the parasite of Ascocotyle (Phagicola) longa Ransom, 1920 from the Caspian Sea, Iran. During two years, April 2017 until 2018, 158 specimens of mullet fish, Chelon auratus and Chelon saliens (Risso, 1810) were collected and carefully examined considering the standard parasitological methods. Interestingly, the metacercaria was found in the stomach and intestine of the mullets. Morphological and morphometric analyses indicated that this parasite species belongs to Ascoctyle (Phagicola) longa. Overall infection mean intensity (52.1±128.3), mean abundance (14.8±71.9) and prevalence (28.5%) were calculated in mullets. Differences in the infection level of Ascocotyle (Phagicola) longa in relation to fish species, location and sampling years are determined and discussed. So that the mean intensity of this parasite is significantly different in the two locations of Anzali and Kiashahr (X2=13.35, df=1, p=0.00<0.05) and the mean intensity between mullet species (X2=5.49, df=1, p=0.019<0.05) is significantly different. In fact, A. (Phagicola) longa is a widespread and rife fishborne zoonotic parasite and also one of the most notable agents of human heterophyosis observed in the Caspian Sea.
事实上，伊朗里海地区尚无关于1920年兰氏长囊吸虫（学名：Ascocotyle (Phagicola) longa Ransom）的任何报道。在2017年4月至2018年的两年间，共采集了158份鲻科鱼类标本，包括金头鲻（Chelon auratus）和银头鲻（Chelon saliens (Risso, 1810)），并按照标准寄生虫学方法进行了仔细检查。有趣的是，在鲻鱼的胃和肠道中发现了囊蚴。形态学和形态计量学分析表明，该寄生虫物种属于长囊吸虫（Ascoctyle (Phagicola) longa）。计算得出鲻鱼的总体感染平均强度为（52.1±128.3），平均丰度为（14.8±71.9），感染率为28.5%。确定并讨论了长囊吸虫（Ascocotyle (Phagicola) longa）在感染水平上与鱼类物种、地点和采样年份的差异。结果显示，该寄生虫在安扎利和基亚沙尔两个地点的平均强度存在显著差异（X2=13.35，自由度=1，p=0.00<0.05），在不同鲻鱼物种之间的平均强度也存在显著差异（X2=5.49，自由度=1，p=0.019<0.05）。实际上，长囊吸虫是一种广泛流行的食源性人畜共患寄生虫，也是里海地区观察到的人类异形吸虫病最显著的病原体之一。
