AN OUTBREAK OF GNATHOSTOMIASIS AMONG KOREAN EMIGRANTS IN MYANMAR

JONG-YIL CHAI Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center, Seoul, Republic of Korea; Department of Parasitology, Kangwon National University College of Medicine, Chunchon, Republic of Korea; Department of Parasitology, College of Medicine, Kyunghee University, Seoul, Republic of Korea; Embassy of Japan, Washington, District of Columbia; Department of Parasitology, Miyazaki Medical College, Kiyotake, Miyazaki, Japan

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EUN-TAEK HAN Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center, Seoul, Republic of Korea; Department of Parasitology, Kangwon National University College of Medicine, Chunchon, Republic of Korea; Department of Parasitology, College of Medicine, Kyunghee University, Seoul, Republic of Korea; Embassy of Japan, Washington, District of Columbia; Department of Parasitology, Miyazaki Medical College, Kiyotake, Miyazaki, Japan

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EUN-HEE SHIN Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center, Seoul, Republic of Korea; Department of Parasitology, Kangwon National University College of Medicine, Chunchon, Republic of Korea; Department of Parasitology, College of Medicine, Kyunghee University, Seoul, Republic of Korea; Embassy of Japan, Washington, District of Columbia; Department of Parasitology, Miyazaki Medical College, Kiyotake, Miyazaki, Japan

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JAE-HWAN PARK Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center, Seoul, Republic of Korea; Department of Parasitology, Kangwon National University College of Medicine, Chunchon, Republic of Korea; Department of Parasitology, College of Medicine, Kyunghee University, Seoul, Republic of Korea; Embassy of Japan, Washington, District of Columbia; Department of Parasitology, Miyazaki Medical College, Kiyotake, Miyazaki, Japan

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JONG-PHIL CHU Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center, Seoul, Republic of Korea; Department of Parasitology, Kangwon National University College of Medicine, Chunchon, Republic of Korea; Department of Parasitology, College of Medicine, Kyunghee University, Seoul, Republic of Korea; Embassy of Japan, Washington, District of Columbia; Department of Parasitology, Miyazaki Medical College, Kiyotake, Miyazaki, Japan

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MASAKI HIROTA Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center, Seoul, Republic of Korea; Department of Parasitology, Kangwon National University College of Medicine, Chunchon, Republic of Korea; Department of Parasitology, College of Medicine, Kyunghee University, Seoul, Republic of Korea; Embassy of Japan, Washington, District of Columbia; Department of Parasitology, Miyazaki Medical College, Kiyotake, Miyazaki, Japan

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FUKUMI NAKAMURA-UCHIYAMA Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center, Seoul, Republic of Korea; Department of Parasitology, Kangwon National University College of Medicine, Chunchon, Republic of Korea; Department of Parasitology, College of Medicine, Kyunghee University, Seoul, Republic of Korea; Embassy of Japan, Washington, District of Columbia; Department of Parasitology, Miyazaki Medical College, Kiyotake, Miyazaki, Japan

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YUKIFUMI NAWA Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center, Seoul, Republic of Korea; Department of Parasitology, Kangwon National University College of Medicine, Chunchon, Republic of Korea; Department of Parasitology, College of Medicine, Kyunghee University, Seoul, Republic of Korea; Embassy of Japan, Washington, District of Columbia; Department of Parasitology, Miyazaki Medical College, Kiyotake, Miyazaki, Japan

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Thirty-eight (designated as cases) of 60 Korean emigrants who consumed raw fresh water fish in Yangon, Myanmar developed migratory swellings and creeping eruptions on the back, abdomen, flank, and other cutaneous areas 1–10 weeks later. The symptoms included itching, nodule formation, fatigue, urticaria, fever, pain on the skin, and erythematous plaques. Skin biopsies of two cases revealed no parasites. However, the mean ± SD peripheral blood eosinophilia among the cases was 6.3 ± 6.5% (n = 29) and 9.0 ± 9.8% (n = 26) in two examinations. An enzyme-linked immunosorbent assay of their serum samples, using Gnathostoma doloresi adult worms as the antigen, showed mean ± SD optical densities of 0.47 ± 0.29 (n = 28) and 0.32 ± 0.20 (n = 30) in two examinations and 0.12 ± 0.09 (n = 50) in healthy controls. Two advanced third-stage larvae of G. spinigerum were found in two of six catfish purchased at a local market in Yangon. The outbreak of the human infection is suggested to have been due to G. spinigerum, which is known to live out its life cycle in the Yangon area of Myanmar.

Author Notes

Reprint requests: Jong-Yil Chai, Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Disease, Seoul National University Medical Research Center, Seoul 110-799, Republic of Korea, E-mail: cjy@plaza.snu.ac.kr.
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