Parasites, Hosts and Diseases

"anisakid larva"

Brief Communications

Anisakid Larvae from Anchovies in the South Coast of Korea: Taehee Chang, Bong-Kwang Jung, Sooji Hong, Hyejoo Shin, Jeonggyu Lee, Laddawan Patarwut, Jong-Yil Chai; Korean J Parasitol 2019;57(6):699-704.
Published online December 31, 2019; DOI: https://doi.org/10.3347/kjp.2019.57.6.699

Abstract
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Anisakiasis (anisakidosis) refers to a foodborne zoonosis caused by ingesting raw or undercooked marine fish or cephalopods infected with anisakid larvae. The present study was performed to investigate the prevalence of anisakid larvae in anchovies (Engraulis japonica) purchased from 2 local markets in Gyeongsangnam-do, the Republic of Korea (=Korea), during 2018-2019. Anchovies were transported to our laboratory and examined by pepsin-HCl artificial digestion technique followed by microscopic observations and molecular analyses. The overall prevalence of anisakid larvae was 19.5% (39/200), from which a total of 51 larvae (av. 1.3 larvae/infected anchovy) were recovered. Sequencing of the larvae targeting the ITS region, including ITS1, 5.8S rRNA, and ITS2 genes confirmed the species of larvae as Anisakis pegreffii (54.9%; 28/51), Hysterothylacium sinense (23.5%; 12/51), and Hysterothylacium aduncum (21.5%; 11/51). The results suggested that anchovies could be a potential source of human anisakiasis in Korea.

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Food Control.2026; 180: 111657. CrossRef
Genetic analyses of Anisakis pegreffii (Nematoda: Anisakidae) from the East Asian finless porpoise Neophocaena asiaeorientalis sunameri (Cetacea: Phocoenidae) in Korean waters
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Molecular Identification of Anisakis Larvae Extracted by Gastrointestinal Endoscopy from Health Check-up Patients in Korea: Hyemi Song, Bong-Kwang Jung, Jaeeun Cho, Taehee Chang, Sun Huh, Jong-Yil Chai; Korean J Parasitol 2019;57(2):207-211.
Published online April 30, 2019; DOI: https://doi.org/10.3347/kjp.2019.57.2.207

Anisakiasis is a zoonotic disease induced by anisakid nematodes, and endoscopic inspection is used for a diagnosis or remedy for it. Anisakis simplex, Anisakis physeteris, and Pseudoterranova decipiens had been reported to be the major species causing human infections, particularly, in Japan. However, in Korea, recent studies strongly suggested that Anisakis pegreffii is the major species of human infections. To support this suggestion, we collected anisakid larvae (n=20) from 20 human patients who were undergone gastrointestinal endoscopy at a health check-up center in Korea, and molecular identification was performed on the larvae using PCR-RFLP analysis and gene sequencing of rDNA ITS regions and mtDNA cox2. In addition, anisakid larvae (n=53) collected from the sea eel (Astroconger myriaster) were also examined for comparison with those extracted from humans. The results showed that all human samples (100%) were identified as A. pegreffii, whereas 90.7% of the samples from the sea eel were A. pegreffii with the remaining 9.3% being Hysterothylacium aduncum. Our study confirmed that A. pegreffii is the predominant species causing human anisakiasis in Korea, and this seems to be due to the predominance of this larval type in the fish (sea eels) popularly consumed by the Korean people. The possibility of human infection with H. aduncum in Korea is also suggested.

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Anisakid Larvae from Anchovies in the South Coast of Korea
Taehee Chang, Bong-Kwang Jung, Sooji Hong, Hyejoo Shin, Jeonggyu Lee, Laddawan Patarwut, Jong-Yil Chai
The Korean Journal of Parasitology.2019; 57(6): 699. CrossRef

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Original Article

Larval Anisakid Infections in Marine Fish from Three Sea Areas of the Republic of Korea: Shin-Hyeong Cho, Sang-Eun Lee, Ok-Hee Park, Byoung-Kuk Na, Woon-Mok Sohn; Korean J Parasitol 2012;50(4):295-299.
Published online November 26, 2012; DOI: https://doi.org/10.3347/kjp.2012.50.4.295

Abstract
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The present study was performed to determine the infection status of anisakid larvae in marine fish collected from 3 sea areas of the Republic of Korea. Total 86 marine fish (8 species) collected from the East Sea (Goseong-gun, Gangwon-do), 171 fish (10 species) from the South Sea (Sacheon-si, Gyeongsangnam-do), and 92 fish (7 species) from the Yellow Sea (Incheon Metropolitan City) were examined by both naked eyes and artificial digestion method. Among the total of 349 fish examined, 213 (61.0%) were infected with 8 species of anisakid larvae, i.e., Anisakis simplex, 6 types of Contracaecum spp., and Raphidascaris sp., and the mean larval density was 13.8 per infected fish. Anisakid larvae were detected in 45 fish (52.3%) from the East Sea, 131 fish (76.6%) from the South Sea, and 37 fish (40.2%) from the Yellow Sea. The average numbers of larvae detected were 4.0, 16.6, and 15.9, respectively. Anisakis simplex larvae were detected in 149 fish (42.7%), and the mean larval density was 9.0 per infected fish. They were found in 26 fish (30.2%) collected from the East Sea, 96 fish (56.1%) from the South Sea, and 27 fish (29.3%) from the Yellow Sea. The average numbers of larvae detected were 2.9, 10.3, and 10.5, respectively. Conclusively, the present study suggests that the infection rate and density of anisakid larvae are more or less higher in the fish from the South Sea than those from the East Sea or the Yellow Sea.

Citations

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Re‐evaluation of certain aspects of the EFSA Scientific Opinion of April 2010 on risk assessment of parasites in fishery products, based on new scientific data. Part 2
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Qing Liu, Qi Wang, Jing Jiang, Jun-Yang Ma, Xing-Quan Zhu, Qing-Long Gong
Frontiers in Veterinary Science.2022;[Epub] CrossRef
Epidemical study of third stage larvae of Anisakis spp. infection in marine fishes in China from 2016 to 2017
Shuran Yang, Xiaoyan Pei, Ying Li, Li Zhan, Zhen Tang, Weiwei Chen, Xia Song, Dajin Yang
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