<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Anisakid nematodes are parasites of cetaceans, their larval stages live in marine fishes. The third-stage larvae of some <italic>Anisakis</italic> species are also the etiological agents of human anisakiasis caused by consumption of raw or undercooked infected fish. Thus, identification of <italic>Anisakis</italic> larvae at the species level is crucial for their ecology and epidemiology. In Vietnam, although <italic>Anisakis</italic> larvae have been reported, they have not been identified to the species level. The aim of this study was, therefore, to identify third-stage larvae of <italic>Anisakis</italic> collected from marine fishes in Vietnamese water, based on morphological characteristics and molecular analysis. All <italic>Anisakis</italic> larvae found in this study were morphologically similar to each other and identical to <italic>Anisakis typica</italic>. In addition, molecular analysis based on ITS1-5.8S-ITS2 sequences confirmed them as <italic>A. typica</italic>. Vietnamese <italic>A. typica</italic> population was genetically close to those from Asian countries and Australia. The third-stage larvae of <italic>A. typica</italic> were collected from eight fish species from three localities in the South of Vietnam. Among them, seven were recorded as new intermediate hosts of <italic>A. typica</italic>. This is the first identification of <italic>A. typica</italic> larvae in Vietnamese water with records of new fish hosts.</p>
</abstract>

Anisakid nematodes are parasites of cetaceans, their larval stages live in marine fishes. The third-stage larvae of some Anisakis species are also the etiological agents of human anisakiasis caused by consumption of raw or undercooked infected fish. Thus, identification of Anisakis larvae at the species level is crucial for their ecology and epidemiology. In Vietnam, although Anisakis larvae have been reported, they have not been identified to the species level. The aim of this study was, therefore, to identify third-stage larvae of Anisakis collected from marine fishes in Vietnamese water, based on morphological characteristics and molecular analysis. All Anisakis larvae found in this study were morphologically similar to each other and identical to Anisakis typica. In addition, molecular analysis based on ITS1-5.8S-ITS2 sequences confirmed them as A. typica. Vietnamese A. typica population was genetically close to those from Asian countries and Australia. The third-stage larvae of A. typica were collected from eight fish species from three localities in the South of Vietnam. Among them, seven were recorded as new intermediate hosts of A. typica. This is the first identification of A. typica larvae in Vietnamese water with records of new fish hosts.

<article-title xml:lang="en">First morphological and molecular identification of third-stage larvae of <italic>Anisakis typica</italic> (Nematoda: Anisakidae) from marine fishes in Vietnamese water

Journal of Nematology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

First morphological and molecular identification of third-stage larvae of  (Nematoda: Anisakidae) from marine fishes in Vietnamese water

Anisakid nematodes are parasites of cetaceans, their larval stages live in marine fishes. The third-stage larvae of some Anisakis species are also the...

First morphological and molecular identification of third-stage larvae of Anisakis typica (Nematoda: Anisakidae) from marine fishes in Vietnamese water

Published Online: Jan 01, 2021

Page range: 1 - 9

DOI: https://doi.org/10.21307/jofnem-2021-010

Keywords
Anisakid larvae, Intermediate fish host, Molecular analyzes, Morphology, Vietnam

© 2021 Authors, published by Sciendo.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

First morphological and molecular identification of third-stage larvae of Anisakis typica (Nematoda: Anisakidae) from marine fishes in Vietnamese water

Published Online: Jan 01, 2021

Page range: 1 - 9

DOI: https://doi.org/10.21307/jofnem-2021-010

KeywordsAnisakid larvae, Intermediate fish host, Molecular analyzes, Morphology, Vietnam

© 2021 Authors, published by Sciendo.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
Anisakid larvae, Intermediate fish host, Molecular analyzes, Morphology, Vietnam