First record of Pseudoterranova decipiens (Nematoda, Anisakidae) infecting the Red spot emperor Lethrinus lentjan in the Red Sea

Abstract

The current parasitological study was carried out to investigate helminth parasites infecting the Red spot emperor Lethrinus lentjan inhabiting Hurghada City at the Gulf of Suez, Red Sea, Egypt. Third-stage larvae of nematode parasite was isolated from the intestine as well as body cavity of the examined fish. Light and scanning electron microscopy revealed that this parasite belonged to Anisakidae family within the genus Pseudoterranova. The present species is named Pseudoterranova decipiens based on the presence of triangular mouth aperture with prominent boring teeth and soft swellings of the cuticle, long muscular esophagus, ventrally excretory pore, and narrow transverse slit of anal opening followed by a short mucron. The morphological characteristics of this species were confirmed by molecular analysis of 18S rDNA gene region of the present parasite. It demonstrated a close identity ≥89% with taxa under family Anisakidae, 85% with Raphidascarididae, and 79-84% with Toxocaridae. A preliminary genetic comparison between gene sequence of the present parasite and other oxyurid species placeed it as a putative sister taxon to other Pseudoterranova decipiens described previously. This study demonstrated that the 18S rDNA gene region of Pseudoterranova decipiens yielded a unique sequence that confirmed its taxonomic position in Anisakidae.

Species of Anisakidae nematodes and Clinostomum spp. infecting lisa Mugil curema (Mugilidae) intended for human consumption in Mexico

“…booring tooth presence near to oral apperture, tail conical and mucron absent, were the structures employed for identification (Fonseca et al, 2016), and Pseudoterranova spp. third stage nematode was described for triangular mouth with a prominent boring tooth, and the presence of mucron in the body ended (Al Quraishy et al, 2019).…”

Fish disease study of Asian seabass (Lates calcarifer) in a floating marine cage: Endoparasite and blood profile

“…The Pseudoterranova larvae found in this study had a reddish body with an elongated body length of 7.418 mm, which indicated that they were in the L3 stage. Al Quraishy et al (2019) explain that the body length of Pseudoterranova larvae ranges from 6.8 to 8.6 mm, and body width, 0.16-0.21 mm. Ruckert et al (2008) report that each individual of Asian seabass cultured in Hurun Bay, Lampung, Indonesia, was infected with at least two parasite species.…”

Morphological description and molecular characterization of Contracaecum larvae (Nematoda: Anisakidae) parasitizing market-size hybrid tilapia (Oreochromis aureus x Oreochromis niloticus) and red drum (Sciaenops ocellatus) farmed in Israel

“…Fish-borne larval nematodes belonging to the family Anisakidae with the three genera Anisakis , Pseudoterranova and Contracaecum are of a cosmopolitan dispersion among wild and farmed fish populations ( Aibinu et al, 2019 ; Al Quraishy et al, 2019 ; Shamsi, 2019 ) and the infective third-stage larva (L3) in fish is able to infect humans ingesting raw or undercooked fish products which may elicit severe clinical symptoms ( Shamsi and Butcher, 2011 ; Nagasawa, 2012 ).…”