New host records of three juvenile nematodes in Egypt: Anisakis sp. (Type II), Hysterothylacium patagonense (Anisakidae), and Echinocephalus overstreeti (Gnathostomatidae) from the greater lizard fish Saurida undosquamis of the Red Sea

Abstract

Three juvenile nematode parasites were collected naturally from 90 (75 %) out of 120 specimens of the marine greater lizard fish Saurida undosquamis captured from water coasts at Hurghada City along the Red Sea in Egypt during the period from September 2013 to April 2014. Worms were identified on the basis of light and scanning electron microscopy. Two of the recovered worms were isolated from the peritoneal cavity of the infected fish around the wall of the stomach as encapsulated larvae. The anisakid juvenile Anisakis sp. (Type II) was characterized by an anteroventrally triangular mouth, with a boring tooth; its postanal tail was rounded, without a terminal mucron or spine. The gnathostomatid Echinocephalus overstreeti was characterized by the presence of a cephalic bulb armed with six transverse rows of spines which were slightly more compact near the anterior end of bulb with maximal separation near the midbulb; the cephalic bulb terminated at a pseudolabia which situated dorsoventrally and reached its greatest width at the posterior one third of the body, The postanal tail terminated at a pointed mucron. The third juvenile species, Hysterothylacium patagonense (Anisakidae), was isolated from the intestine of the infected fish; they are characterized by a small-sized body with a conical tail provided by a nodulose apex, and the anterior end was equipped with three lips. A dorsal lip slightly smaller than the two subventrals left a deep postlabial groove and prominent lateral flanges in between, and the proximal part of each lip was smooth. The three described species were compared morphologically and morphometrically with some of the previously recorded species of the same genus. From this comparison, the similarity and variations between these species were described and concluded that the present study should be considered as a new host record in Egypt.

New Host Record of Echinocephalus Overstreeti Deardorff and Ko (1983) (Nematoda: Gnathostomatidae) From the Common Sea Bream Pagrus Pagrus (Sparidae) of the Red Sea in Egypt

“…In the present study, larvae were isolated from P. pagrus intestine. Also, it was found in Saurida undosquamis (Morsy et al, 2015). The present morphology agreed with the descriptions of E. overstreeti of Deardorff and Ko (1983) in presence of very narrow lateral alae, simple pseudolabia, two well-developed papillae and amphid, small rounded interlabia, cephalic bulb and arranged spines.…”

Role of Sea Bream Fish P. Pagrus (Family: Sparidae) in Harboring Some Larval Ascaridoids (Family: Anisakidae) in Cairo Governorate, Egypt

“…Also, it was higher than (33.7%) by Debenedetti et al (2019) in At-lantic and Mediterranean Regions; they reported that larvae were higher in viscera than musculature. But, Morsy et al (2015) recorded 3 juvenile nematodes; Anisakis sp.…”

“…Rizk et al (2015) reported it some marine fish in Damietta. Morsy et al (2015) recorded three juvenile nematodes: Anisakis Hysterothylacium patagnense and Echinocephalus overstreeti from Saurida undosquamis in the Red Sea. Younis et al (2017) found Contracaecum larva from teleostean species in Lake Nasser.…”

Cytokine signature and antibody-mediated response against fresh and attenuated Anisakis simplex (L3) administration into Wistar rats: implication for anti-allergic reaction

“…Heavily infected fish show emaciation, imbalanced swimming, and reduction of their vitality (Klimpel et al 2011;Mehlhorn et al 2011;Morsy et al 2013Morsy et al , 2015Abdel-Ghaffar et al 2014. The consumption of raw or undercooked fish may lead to infection with several helminthes.…”