Parasites, Hosts and Diseases

"Kyoung-Ho Pyo"

Original Article

Prominent IL-12 Production and Tumor Reduction in Athymic Nude Mice after Toxoplasma gondii Lysate Antigen Treatment: Kyoung-Ho Pyo, Bong-Kwang Jung, Chun-Feng Xin, You-Won Lee, Jong-Yil Chai, Eun-Hee Shin; Korean J Parasitol 2014;52(6):605-612.
Published online December 23, 2014; DOI: https://doi.org/10.3347/kjp.2014.52.6.605

Abstract
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Toxoplasma gondii is an intracellular protozoan parasite that causes a Th1 cellular immunity. Our previous study showed that T. gondii lysate antigen (TLA) treatment in S180 tumor-bearing mice resulted in tumor reduction by suppressing CD31 expression, a marker of angiogenesis. In the present study, to investigate tumor suppressive effect of TLA under the absence of T lymphocytes, athymic nude mice were compared with euthymic mice in the anti-tumorigenic effect triggered by TLA in CT26 tumors. According to the results, intratumorally injected TLA reduced tumor growth and TIMP-1 level, a metastatic marker, in both euthymic and athymic mice. TLA treatment led to a sharp increase in IL-12 expression in serum cytokine profiling of athymic mice, and increased MyD88 signals in macrophages derived from the bone marrow, implying the activation of innate immunity. The selective induction of IL-12 by TLA treatment had an anti-tumorigenic effect.

Citations

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Brief Communications

Phylogenetic Relationships of 3 Korean Neodiplostomum Species (Digenea: Neodiplostomidae) Based on Partial CO1 Gene: Kyoung-Ho Pyo, Jo Woon Yi Lee, Jin-Ju Lee, Yun-Kyu Park, Eun-Hee Shin, Jong-Yil Chai; Korean J Parasitol 2014;52(3):325-329.
Published online June 26, 2014; DOI: https://doi.org/10.3347/kjp.2014.52.3.325

Abstract
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The phylogenetic relationships of the 3 Neodiplostomum spp. (Digenea: Neodiplostomidae) occurring in Korea (N. seoulense, N. leei, and N. boryongense) were analyzed using the partial mitochondrial cytochrome c oxidase subunit 1 (CO1) gene. The adult flukes were recovered from Sprague-Dawley rats (N. seoulense) and newborn chicks (N. leei and N. boryongense) experimentally infected with the neodiplostomula from the grass snake, Rhabdophis tigrinus tigrinus. The genomic DNA was amplified using specific primers, and the sequence of CO1 was obtained. According to the results, the pairwise similarity was 96.1% between N. boryongense and N. seoulense, but was 95.0% between N. boryongense and N. leei and 94.2% between N. leei and N. seoulense. The results demonstrated a closer phylogenetic relationship between N. seoulense and N. boryongense. This high relationship of N. seoulense and N. boryongense may be related to their similar morphologic features including the limited distribution of vitellaria and the presence of a genital cone. N. leei is distinct on the other hand with an extensive distribution of vitellaria and the absence of a genital cone.

Citations

Citations to this article as recorded by

Neodiplostomum cf. seoulense (Seo, Rim, Lee, 1964) sensu Pyo et al., 2014 (Trematoda: Diplostomidae Poirier, 1886): morphology, life cycle, and phylogenetic relationships
A. V. Izrailskaia, V. V. Besprozvannykh
Journal of Helminthology.2023;[Epub] CrossRef
Paraphyly of Conodiplostomum Dubois, 1937
Petr Heneberg, Jiljí Sitko, Miroslav Těšínský
Parasitology International.2020; 76: 102033. CrossRef
New data on Neodiplostomum americanum Chandler and Rausch, 1947 (Digenea: Diplostomidae), in the Great Horned Owl Bubo virginianus Gmelin, 1788 and the Eastern Screech Owl Megascops asio Linnaeus, 1758 in Mississippi, USA
Ethan T. Woodyard, Thomas G. Rosser, Matt J. Griffin
Parasitology Research.2017; 116(8): 2075. CrossRef

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STAT6 Expression and IL-13 Production in Association with Goblet Cell Hyperplasia and Worm Expulsion of Gymnophalloides seoi from C57BL/6 Mice: Jin-Joo Lee, Donghee Kim, Kyoung-Ho Pyo, Min-Ki Kim, Hyo-Jin Kim, Jong-Yil Chai, Eun-Hee Shin; Korean J Parasitol 2013;51(5):589-594.
Published online October 31, 2013; DOI: https://doi.org/10.3347/kjp.2013.51.5.589

Abstract
PDF

In intestinal helminth infections, Th2 immune respones are generally associated with mucin secretion for worm expulsion from the host intestine. In particular, IL-4 and IL-13 are the important cytokines related with intestinal mucus production via STAT6 signalling in nematode infections. However, this perspective has never been studied in Gymnophalloides seoi infection. The present study aimed to observe the STAT6 signalling and cytokine responses in C57BL/6 mice, a mouse strain resistant to infection with this trematode. The results showed that worm expulsion occurred actively during days 1-2 post-infection (PI), when goblet cells began to proliferate in the small intestine. The STAT6 gene expression in the mouse spleen became remarkable from day 2 PI. Moreover, G. seoi infection induced a significant increase of IL-13 from day 4 PI in the spleen of infected mice. Our results suggested that goblet cell hyperplasia and worm expulsion in G. seoi-infected mice should be induced by STAT6 signalling, in which IL-13 may be involved as a dominant triggering cytokine.

Citations

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Immune Regulation of Goblet Cell and Mucus Functions in Health and Disease
Jenny K. Gustafsson, Gunnar C. Hansson
Annual Review of Immunology .2025; 43(1): 169. CrossRef
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Franziska Bayer, Olga Dremova, My Phung Khuu, Könül Mammadova, Giulia Pontarollo, Klytaimnistra Kiouptsi, Natalia Soshnikova, Helen Louise May-Simera, Kristina Endres, Christoph Reinhardt
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Songwei Yang, Min Yu
Journal of Inflammation Research.2021; Volume 14: 3171. CrossRef
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Mingming Zhang, Chenchen Wu
Bioscience Reports.2020;[Epub] CrossRef
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Hongbo Yi, Denghu Jiang, Lin Zhang, Haitao Xiong, Feifei Han, Yizhen Wang
International Immunopharmacology.2016; 36: 199. CrossRef
Increased Intestinal Epithelial Cell Turnover and Intestinal Motility in Gymnophalloides seoi-Infected C57BL/6 Mice
Sang Hyub Lee, Bong-Kwang Jung, Jae-Hwan Park, Eun-Hee Shin, Jong-Yil Chai
The Korean Journal of Parasitology.2014; 52(3): 273. CrossRef

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88 Download
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Effect of Temperature on Embryonation of Ascaris suum Eggs in an Environmental Chamber: Min-Ki Kim, Kyoung-Ho Pyo, Young-Sang Hwang, Ki Hwan Park, In Gyun Hwang, Jong-Yil Chai, Eun-Hee Shin; Korean J Parasitol 2012;50(3):239-242.
Published online August 13, 2012; DOI: https://doi.org/10.3347/kjp.2012.50.3.239

Abstract
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The influence of temperature on the development and embryonation of Ascaris suum eggs was studied using coarse sand medium in an environmental chamber with 50% humidity. The time required for development and embryonation of eggs was examined under 3 different temperature conditions, 5℃, 25℃, and 35℃. A. suum eggs did not develop over 1 month at the temperature of 5℃. However, other temperature conditions, 25℃ and 35℃, induced egg development to the 8-cell-stage at days 5-6 after incubation. All eggs examined developed to the 8-cell stage at day 6 after incubation in the sand medium at 25℃. The higher temperature, 35℃, slightly accelerated the A. suum egg development compared to 25℃, and the development to the 8-cell stage occurred within day 5 after incubation. The formation of larvae in A. suum eggs at temperatures of 35℃ and 25℃ appeared at days 17 and 19 after incubation, respectively. These findings show that 35℃ condition shortens the time for the development of A. suum eggs to the 8-cell-stage in comparison to 25℃, and suggest the possibility of accelerated transmission of this parasite, resulting from global warming and ecosystem changes.

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Depressed Neuronal Growth Associated Protein (GAP)-43 Expression in the Small Intestines of Mice Experimentally Infected with Neodiplostomum seoulense: Kyoung-Ho Pyo, Eun-Young Kang, Bong-Kwang Jung, Jung-Ho Moon, Jong-Yil Chai, Eun-Hee Shin; Korean J Parasitol 2012;50(1):89-93.
Published online March 6, 2012; DOI: https://doi.org/10.3347/kjp.2012.50.1.89

Abstract
PDF

Neodiplostomum seoulense (Digenea: Neodiplostomidae) is an intestinal trematode that can cause severe mucosal pathology in the small intestines of mice and even mortality of the infected mice within 28 days after infection. We observed neuronal growth associated protein-43 (GAP-43) expression in the myenteric plexus of the small intestinal wall of N. seoulense-infected mice until day 35 post-infection (PI). BALB/c mice were infected with 200 or 500 N. seoulense metacercariae isolated from naturally infected snakes and were killed every 7 days for immunohistochemical demonstration of GAP-43 in the small intestines. N. seoulense-infected mice showed remarkable dilatation of intestinal loops compared with control mice through days 7-28 PI. Conversely, GAP-43 expression in the mucosal myenteric plexus was markedly (P<0.05) reduced in the small intestines of N. seoulense-infected mice during days 7-28 PI and was slightly normalized at day 35 PI. From this study, it is evident that neuronal damage occurs in the intestinal mucosa of N. seoulense-infected mice. However, the correlation between intestinal pathology, including the loop dilatation, and depressed GAP-43 expression remains to be elucidated.

Citations

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Enhanced serotonin signaling increases intestinal neuroplasticity
Chasen J. Greig, Neeru Gandotra, John J. Tackett, Michaela C. Bamdad, Robert A. Cowles
Journal of Surgical Research.2016; 206(1): 151. CrossRef

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Resistance to Toxoplasma gondii Infection in Mice Treated with Silk Protein by Enhanced Immune Responses: Joung-Ho Moon, Kyoung-Ho Pyo, Bong-Kwang Jung, Hyang Sook Chun, Jong-Yil Chai, Eun-Hee Shin; Korean J Parasitol 2011;49(3):303-308.
Published online September 30, 2011; DOI: https://doi.org/10.3347/kjp.2011.49.3.303

Abstract
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This study investigated whether elevated host immune capacity can inhibit T. gondii infection. For this purpose, we used silk protein extracted from Bombyx mori cocoons as a natural supplement to augment immune capacity. After silk protein administration to BALB/c mice for 6 weeks, ratios of T lymphocytes (CD4⁺ and CD8⁺ T-cells) and splenocyte proliferative capacities in response to Con A or T. gondii lysate antigen (TLA) were increased. Of various cytokines, which regulate immune systems, Th1 cytokines, such as IFN-γ, IL-2, and IL-12, were obviously increased in splenocyte primary cell cultures. Furthermore, the survival of T. gondii (RH strain)-infected mice increased from 2 days to 5 or more days. In a state of immunosuppression induced by methylprednisolone acetate, silk protein-administered mice were resistant to reduction in T-lymphocyte (CD4⁺ and CD8⁺ T-cells) numbers and the splenocyte proliferative capacity induced by Con A or TLA with a statistical significance. Taken together, our results suggest that silk protein augments immune capacity in mice and the increased cellular immunity by silk protein administration increases host protection against acute T. gondii infection.

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Pharmaceutical Biology.2019; 57(1): 369. CrossRef
Oral Administration of Silk Peptide Enhances the Maturation and Cytolytic Activity of Natural Killer Cells
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Charles B. Chesson, Shaunte Ekpo-Otu, Janice J. Endsley, Jai S. Rudra
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STAT6 Expression and IL-13 Production in Association with Goblet Cell Hyperplasia and Worm Expulsion of Gymnophalloides seoi from C57BL/6 Mice
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The Korean Journal of Parasitology.2013; 51(5): 589. CrossRef

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Original Article

Immune Responses of Mice Intraduodenally Infected with Toxoplasma gondii KI-1 Tachyzoites: Eun-Hee Shin, Yeoun Sook Chun, Won-Hee Kim, Jae-Lip Kim, Kyoung-Ho Pyo, Jong-Yil Chai; Korean J Parasitol 2011;49(2):115-123.
Published online June 14, 2011; DOI: https://doi.org/10.3347/kjp.2011.49.2.115

Abstract
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Toxoplasma gondii Korean isolate (KI-1) tachyzoites were inoculated intraduodenally to BALB/c mice using a silicon tube, and the course of infection and immune responses of mice were studied. Whereas control mice, that were infected intraperitoneally, died within day 7 post-infection (PI), the intraduodenally infected mice survived until day 9 PI (infection with 1×10⁵ tachyzoites) or day 11 PI (with 1×10⁶ tachyzoites). Based on histopathologic (Giemsa stain) and PCR (B1 gene) studies, it was suggested that tachyzoites, after entering the small intestine, invaded into endothelial cells, divided there, and propagated to other organs. PCR appeared to be more sensitive than histopathology to detect infected organs and tissues. The organisms spread over multiple organs by day 6 PI. However, proliferative responses of splenocytes and mesenteric lymph node (MLN) cells in response to con A or Toxoplasma lysate antigen decreased significantly, suggesting immunosuppression. Splenic CD4⁺ and CD8⁺ T-lymphocytes showed decreases in number until day 9 PI, whereas IFN-γ and IL-10 decreased slightly at day 6 PI and returned to normal levels by day 9 PI. No TNF-α was detected throughout the experimental period. The results showed that intraduodenal infection with KI-1 tachyzoites was successful but did not elicit significant mucosal immunity in mice and allowed dissemination of T. gondii organisms to systemic organs. The immunosuppression of mice included reduced lymphoproliferative responses to splenocytes and MLN cells to mitogen and low production of cytokines, such as IFN-γ, TNF-α, and IL-10, in response to T. gondii infection.

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Saumya Srivastava, Anil Kumar Gupta, Amit Singh, Sudip Kumar Datta, Sarman Singh
Journal of Parasitic Diseases.2025; 49(4): 897. CrossRef
Toxoplasma gondii macrophage migration inhibitory factor shows anti– Mycobacterium tuberculosis potential via AZIN1/STAT1 interaction
Chanjin Yoon, Hyo Keun Kim, Yu Seong Ham, Woo Jin Gil, Seok-Jun Mun, Euni Cho, Jae-Min Yuk, Chul-Su Yang
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Increase in the nuclear localization of PTEN by the Toxoplasma GRA16 protein and subsequent induction of p53‐dependent apoptosis and anticancer effect
Sang‐Gyun Kim, Seung‐Hwan Seo, Ji‐Hun Shin, Jung‐Pyo Yang, Sang Hyung Lee, Eun‐Hee Shin
Journal of Cellular and Molecular Medicine.2019; 23(5): 3234. CrossRef
Kinetics of acute infection with Toxoplasma gondii and histopathological changes in the duodenum of rats
Aline Rosa Trevizan, Suellen Laís Vicentino-Vieira, Paulo da Silva Watanabe, Marcelo Biondaro Góis, Gessilda de Alcântara Nogueira de Melo, João Luiz Garcia, Eduardo José de Almeida Araújo, Débora de Mello Gonçales Sant'Ana
Experimental Parasitology.2016; 165: 22. CrossRef
In vitro inhibition of Toxoplasma gondii by the anti-malarial candidate, 6-(1,2,6,7-tetraoxaspiro[7.11]nonadec-4-yl)hexan-1-ol
Chun-Feng Xin, Hye-Sook Kim, Akira Sato, Hak-Jae Lee, You-Won Lee, Kyoung-Ho Pyo, Eun-Hee Shin
Parasitology International.2016; 65(5): 494. CrossRef
Immune adjuvant effect of aToxoplasma gondiiprofilin-like protein in autologous whole-tumor-cell vaccination in mice
Kyoung-Ho Pyo, You-Won Lee, Sun Min Lim, Eun-Hee Shin
Oncotarget.2016; 7(45): 74107. CrossRef
Resistance toToxoplasma gondiiInfection in Mice Treated with Silk Protein by Enhanced Immune Responses
Joung-Ho Moon, Kyoung-Ho Pyo, Bong-Kwang Jung, Hyang Sook Chun, Jong-Yil Chai, Eun-Hee Shin
The Korean Journal of Parasitology.2011; 49(3): 303. CrossRef

9,945 View
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Brief Communications

CD8⁺ T-cell Activation in Mice Injected with a Plasmid DNA Vaccine Encoding AMA-1 of the Reemerging Korean Plasmodium vivax: Hyo-Jin Kim, Bong-Kwang Jung, Jin-Joo Lee, Kyoung-Ho Pyo, Tae Yun Kim, Byung-il Choi, Tae Woo Kim, Hajime Hisaeda, Kunisuke Himeno, Eun-Hee Shin, Jong-Yil Chai; Korean J Parasitol 2011;49(1):85-90.
Published online March 18, 2011; DOI: https://doi.org/10.3347/kjp.2011.49.1.85

Abstract
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Relatively little has been studied on the AMA-1 vaccine against Plasmodium vivax and on the plasmid DNA vaccine encoding P. vivax AMA-1 (PvAMA-1). In the present study, a plasmid DNA vaccine encoding AMA-1 of the reemerging Korean P. vivax has been constructed and a preliminary study was done on its cellular immunogenicity to recipient BALB/c mice. The PvAMA-1 gene was cloned and expressed in the plasmid vector UBpcAMA-1, and a protein band of approximately 56.8 kDa was obtained from the transfected COS7 cells. BALB/c mice were immunized intramuscularly or using a gene gun 4 times with the vaccine, and the proportions of splenic T-cell subsets were examined by fluorocytometry at week 2 after the last injection. The spleen cells from intramuscularly injected mice revealed no significant changes in the proportions of CD8⁺ T-cells and CD4⁺ T-cells. However, in mice immunized using a gene gun, significantly higher (P<0.05) proportions of CD8⁺ cells were observed compared to UB vector-injected control mice. The results indicated that cellular immunogenicity of the plasmid DNA vaccine encoding AMA-1 of the reemerging Korean P. vivax was weak when it was injected intramuscularly; however, a promising effect was observed using the gene gun injection technique.

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Takashi Imai, Ha Ngo-Thanh, Kazutomo Suzue, Aoi Shimo, Akihiro Nakamura, Yutaka Horiuchi, Hajime Hisaeda, Takashi Murakami
Vaccines.2022; 10(5): 762. CrossRef
Immunotherapeutic Effects of Different Doses of Mycobacterium tuberculosis ag85a/b DNA Vaccine Delivered by Electroporation
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Long-Term Humoral and Cellular Immune Responses Elicited by a Heterologous Plasmodium vivax Apical Membrane Antigen 1 Protein Prime/Adenovirus Boost Immunization Protocol
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Infection and Immunity.2011; 79(9): 3642. CrossRef

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Suppressed CD31 Expression in Sarcoma-180 Tumors after Injection with Toxoplasma gondii Lysate Antigen in BALB/c Mice: Kyoung-Ho Pyo, Bong-Kwang Jung, Jong-Yil Chai, Eun-Hee Shin; Korean J Parasitol 2010;48(2):171-174.
Published online June 17, 2010; DOI: https://doi.org/10.3347/kjp.2010.48.2.171

Abstract
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The anti-tumorigenic effects of Toxoplasma gondii (RH) antigens were studied in a murine sarcoma-180 tumor model. To determine the anti-tumor effects, the reduction in tumor size and expression of CD31 (an angiogenesis marker in the tumor tissue) were examined after injection of BALB/c mice with T. gondii lysate antigen (TLA) or formalin-fixed, proliferation-inhibited, T. gondii tachyzoites. Tumors were successfully produced by an intradermal injection of sarcoma-180 cells with plain Matrigel in the mid-backs of mice. After injection with TLA or formalin-fixed T. gondii tachyzoites, the increase in tumor size and weight nearly stopped while tumor growth continued in control mice that were injected with PBS. CD31 expression in TLA-treated or formalin-fixed T. gondii-injected mice was lower than the control mice. Accordingly, the present study shows that the treatment of mice with formalin-fixed T. gondii or TLA in the murine sarcoma-180 tumor model results in a decrease of both tumor size and CD31 expression.

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The Korean Journal of Parasitology.2011; 49(3): 303. CrossRef

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Detection of Gnathostoma spinigerum Third-Stage Larvae in Snakeheads Purchased from a Central Part of Myanmar: Bong-Kwang Jung, Jin-Ju Lee, Kyoung-Ho Pyo, Hyeong-Jin Kim, Hoo-Gn Jeong, Cheong-Ha Yoon, Soon-Hyung Lee, Eun-Hee Shin, Jong-Yil Chai; Korean J Parasitol 2008;46(4):285-288.
Published online December 20, 2008; DOI: https://doi.org/10.3347/kjp.2008.46.4.285

Abstract
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To examine the infection status of freshwater fish with Gnathostoma spp. larvae in Myanmar, we purchased 15 snakeheads, Channa striatus, from a local market in a suburban area of Naypyidaw, the new capital city. Two larval gnathostomes were collected using an artificial digestion technique, and observed by a light microscope and a scanning electron microscope. The size of an intact larva was 2.65 mm long and 0.32 mm wide. The characteristic morphology of the larvae included the presence of a long esophagus (0.80 mm long), 2 pairs of cervical sacs (0.43 mm long), and a characteristic head bulb with 4 rows of hooklets. The number of hooklets in the 1st, 2nd, 3rd, and 4th row was 45, 48, 50, and 52, respectively. Based on these morphological characters, the larvae were identified as the advanced 3rd-stage larvae of Gnathostoma spinigerum. This is the first report of detection of G. spinigerum 3rd-stage larvae in the central part of Myanmar. Our study suggests that intake of raw meat of snakehead fish in Myanmar may result in human gnathostomiasis.

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