Parasites, Hosts and Diseases

"Nguyen Vu Trung"

Case Reports

Molecular Diagnosis of an Ocular Toxocariasis Patient in Vietnam: Nguyen Van De, Nguyen Vu Trung, Le Van Duyet, Jong-Yil Chai; Korean J Parasitol 2013;51(5):563-567.
Published online October 31, 2013; DOI: https://doi.org/10.3347/kjp.2013.51.5.563

Abstract
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An ocular Toxocara canis infection is reported for the first time in Vietnam. A 34-year-old man residing in a village of Son La Province, North Vietnam, visited the National Eye Hospital (NEH) in August 2011. He felt a bulge-sticking pain in his left eye and loss of vision occurred over 3 months before visiting the hospital. The eye examination in the hospital showed damage of the left eye, red eye, retinal fibrosis, retinal detachment, inflammation of the eye tissues, retinal granulomas, and a parasitic cyst inside. A larva of Toxocara was collected with the cyst by a medical doctor by surgery. Comparison of 264 nucleotides of internal transcribed spacer 2 (ITS2) of ribosomal DNA was done between our Vietnamese Toxocara canis and other Toxocara geographical isolates, including Chinese T. canis, Japanese T. canis, Sri Lankan T. canis, and Iranian T. canis. The nucleotide homology was 97-99%, when our T. canis was compared with geographical isolates. Identification of a T. canis infection in the eye by a molecular method was performed for the first time in Vietnam.

Citations

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An Outbreak of Trichinosis with Molecular Identification of Trichinella sp. in Vietnam: Nguyen Van De, Nguyen Vu Trung, Nguyen Hong Ha, Vu Thi Nga, Nguyen Minh Ha, Pham Thanh Thuy, Le Van Duyet, Jong-Yil Chai; Korean J Parasitol 2012;50(4):339-343.
Published online November 26, 2012; DOI: https://doi.org/10.3347/kjp.2012.50.4.339

Abstract
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The 5th outbreak of trichinosis occurred in a mountainous area of North Vietnam in 2012, involving 24 patients among 27 people who consumed raw pork together. Six of these patients visited several hospitals in Hanoi for treatment. Similar clinical symptoms appeared in these patients within 5-8 days after eating infected raw pork, which consisted of fever, muscle pain, difficult moving, edema, difficult swallowing, and difficult breathing. ELISA revealed all (6/6) positive reactions against Trichinella spiralis antigen and all cases showed positive biopsy results for Trichinella sp. larvae in the muscle. The larvae detected in the patients were identified as T. spiralis (Vietnamese strain) by the molecular analysis of the mitochondrial cytochrome c oxidase subunit III (cox3) gene.

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