Zoology Department, Faculty of Science, Cairo University, Cairo, Egypt.
Parasitol Res. 2013 Jul;112(7):2523-32. doi: 10.1007/s00436-013-3419-y. Epub 2013 Apr 27.
Four previously unrecognized trypanorhynchids are described based on fish specimens from Sparidae and Mullidae host fish of the Red Sea. From September 2010 to June 2011, 66 specimens of the sea bream Pagrus pagrus (F: Sparidae) and 43 of the red mullet Mullus barbatus (F: Mullidae) were purchased from markets in the Suez and Hurghada cities of the Red Sea. The fishes were measured, and their organs investigated for helminth infections. Forty-one (37.6 %) out of the 109 fish specimens investigated were parasitized with Trypanorhyncha metacestodes, identified as Callitetrarhynchus speciouses Linton 1897, Pseudogrillotia sp. Dollfus 1969, Kotorella pronosoma Stossich 1901 from P. pagrus, and Nybelinia bisulcata Linton 1889 from M. barbatus in the mesentery and peritoneal cavity, with prevalences of 16.5, 11.0, 6.0, and 12.0 %. All of these larval stages were encapsulated larvae in blastocysts. C. speciouses is characterized by an elongated scolex, two bothria, a long postbulbosa, and four elongated bulbs. Pseudogrillotia sp. possesses a scolex with two lateral patelliform bothridia; posterior margins are free, not notched. A long sheath was observed, which was irregularly coiled when tentacles invaginated. N. bisulcata possesses an acraspedote scolex with four bothridia, which are broad, bean-shaped. The tentacles are spirally coiled, supplied with hooks with abruptly turned points. The four tentacles sheaths rose from scolex as two anterior (front) and two posterior (back) which overlap at the apices of bulbs. K. pronosoma is characterized by a short body with a craspedote scolex and four bothridia. The tentacles are short and emerge pairwise. The presence of Trypanorhyncha metacestodes in the muscles does not represent a risk of infection for humans. They have a negative effect on fish esthetics. The repugnant aspect and the prohibition for commercial use by sanitary inspectors, however, cause consumer rejection. Parasites of the order Trypanorhyncha have been recorded in these host fishes for the first time.
基于红海 Sparidae 和 Mullidae 宿主鱼类的鱼类标本，描述了四种以前未被识别的旋尾目吸虫。2010 年 9 月至 2011 年 6 月，从苏伊士和赫尔格达市的市场购买了 66 条真鲷 Pagrus pagrus（F：Sparidae）和 43 条红鲻 Mullus barbatus（F：Mullidae）。测量了这些鱼类的大小，并检查了它们的器官是否有寄生虫感染。在所检查的 109 个鱼类标本中，有 41 个（37.6%）被旋尾目幼虫包囊，鉴定为真鲷科 Callitetrarhynchus speciouses Linton 1897、假鲱科 Pseudogrillotia sp. Dollfus 1969、Kotorella pronosoma Stossich 1901 来自 P. pagrus 和 Nybelinia bisulcata Linton 1889 来自 M. barbatus 的肠系膜和腹膜腔中，流行率分别为 16.5%、11.0%、6.0%和 12.0%。所有这些幼虫阶段都是胚泡中的包囊幼虫。C. speciouses 的特点是细长的头节、两个双腔、长的后球茎和四个细长的球茎。假鲱科具有两个侧扁形的头节；后缘游离，无缺口。观察到一个长鞘，当触须内陷时，鞘不规则地卷曲。N. bisulcata 具有一个无刺头节，有四个双腔，双腔宽，呈豆形。触须螺旋状卷曲，附有突然变尖的钩。四个触须鞘从头节升起，形成两个前（前）和两个后（后），在球茎的顶端重叠。K. pronosoma 的特点是短体，有一个头节和四个双腔。触须短，成对出现。肌肉中的旋尾目幼虫不会对人类造成感染风险。它们对鱼类的美感有负面影响。然而，由于卫生检查员的厌恶和禁止商业使用，消费者会拒绝这些鱼类。这些宿主鱼类中首次记录了旋尾目寄生虫。
