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Egyptian Journal of Aquatic Biology and Fisheries
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Mostafa et al., N. (2022). First record of Gnathostoma sp. (Owen, 1836) (Nematoda: Gnathostomatidae) infecting the European Eel Anguilla anguilla (Anguillidae) from the Mediterranean Sea, Egypt. Egyptian Journal of Aquatic Biology and Fisheries, 26(3), 139-148. doi: 10.21608/ejabf.2022.238788
Nesma Mostafa et al.. "First record of Gnathostoma sp. (Owen, 1836) (Nematoda: Gnathostomatidae) infecting the European Eel Anguilla anguilla (Anguillidae) from the Mediterranean Sea, Egypt". Egyptian Journal of Aquatic Biology and Fisheries, 26, 3, 2022, 139-148. doi: 10.21608/ejabf.2022.238788
Mostafa et al., N. (2022). 'First record of Gnathostoma sp. (Owen, 1836) (Nematoda: Gnathostomatidae) infecting the European Eel Anguilla anguilla (Anguillidae) from the Mediterranean Sea, Egypt', Egyptian Journal of Aquatic Biology and Fisheries, 26(3), pp. 139-148. doi: 10.21608/ejabf.2022.238788
Mostafa et al., N. First record of Gnathostoma sp. (Owen, 1836) (Nematoda: Gnathostomatidae) infecting the European Eel Anguilla anguilla (Anguillidae) from the Mediterranean Sea, Egypt. Egyptian Journal of Aquatic Biology and Fisheries, 2022; 26(3): 139-148. doi: 10.21608/ejabf.2022.238788

First record of Gnathostoma sp. (Owen, 1836) (Nematoda: Gnathostomatidae) infecting the European Eel Anguilla anguilla (Anguillidae) from the Mediterranean Sea, Egypt

Article 9, Volume 26, Issue 3, May and June 2022, Page 139-148  XML PDF (850.74 K)
Document Type: Original Article
DOI: 10.21608/ejabf.2022.238788
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Author
Nesma Mostafa et al.
Abstract
Gnathostomiasis is a fish-borne zoonotic infection caused by eating infected seafood or fish parasitized by third-stage nematode larvae of the genus Gnathostoma. Twenty-seven fish specimens of the European eel Anguilla anguilla (Anguillidae) were collected from water coasts of the Mediterranean Sea in Egypt. Of the 27 fish that were studied, 14 fish (51.58%) were parasitized with third-stage larvae (L3) of Gnathostoma sp. (Gnathostomatidae), these larvae were investigated as encapsulated on the surface of different visceral organs and some embedded in muscles of the infected fish. By using both light and scanning electron microscopes, the morphological examination of the recovered nematodes revealed that the main diagnostic features represented by an elongated body, measured 6.5±2 (7.8–9) mm long, and its greatest width observed at the posterior one-third of the body was 0.4±0.02 (0.38–0.44) mm with narrow lateral alae, the presence of a cephalic bulb measured 0.26±0.02 (0.18–0.28) mm long, 0.31±0.02 (0.28–0.34) wide and armed with six transverse rows of spines, mouth opening surrounded by two simple lateral lips, and conical tail terminated with a pointed mucron. The described species was morphologically and morphometrically compared with some of the previously recorded species of the same genus. Based on our detailed description, the present species was identified as Gnathostoma sp. recovered from A.anguilla as the first record in Egypt. 
Keywords
Gnathostoma sp; Anguilla anguilla; Gnathostomiasis; Morphological examination
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