CORRELATION BETWEEN SONOGRAPHIC FINDINGS AND INFECTION INTENSITY IN CLONORCHIASIS

MOON SEOK CHOI Departments of Medicine and Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Molecular Parasitology, Sungkyunkwan University School of Medicine, Suwon, Korea; Department of Parasitology and Entomology, Heilongjiang CDC, China; Korea Association of Health Promotion, Seoul, Korea; Department of Parasitology and Tropical Medicine, and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, Korea

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DONGIL CHOI Departments of Medicine and Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Molecular Parasitology, Sungkyunkwan University School of Medicine, Suwon, Korea; Department of Parasitology and Entomology, Heilongjiang CDC, China; Korea Association of Health Promotion, Seoul, Korea; Department of Parasitology and Tropical Medicine, and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, Korea

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MIN-HO CHOI Departments of Medicine and Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Molecular Parasitology, Sungkyunkwan University School of Medicine, Suwon, Korea; Department of Parasitology and Entomology, Heilongjiang CDC, China; Korea Association of Health Promotion, Seoul, Korea; Department of Parasitology and Tropical Medicine, and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, Korea

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ZHUO JI Departments of Medicine and Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Molecular Parasitology, Sungkyunkwan University School of Medicine, Suwon, Korea; Department of Parasitology and Entomology, Heilongjiang CDC, China; Korea Association of Health Promotion, Seoul, Korea; Department of Parasitology and Tropical Medicine, and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, Korea

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ZHIMIN LI Departments of Medicine and Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Molecular Parasitology, Sungkyunkwan University School of Medicine, Suwon, Korea; Department of Parasitology and Entomology, Heilongjiang CDC, China; Korea Association of Health Promotion, Seoul, Korea; Department of Parasitology and Tropical Medicine, and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, Korea

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SEUNG-YULL CHO Departments of Medicine and Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Molecular Parasitology, Sungkyunkwan University School of Medicine, Suwon, Korea; Department of Parasitology and Entomology, Heilongjiang CDC, China; Korea Association of Health Promotion, Seoul, Korea; Department of Parasitology and Tropical Medicine, and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, Korea

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KWANG-SEON HONG Departments of Medicine and Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Molecular Parasitology, Sungkyunkwan University School of Medicine, Suwon, Korea; Department of Parasitology and Entomology, Heilongjiang CDC, China; Korea Association of Health Promotion, Seoul, Korea; Department of Parasitology and Tropical Medicine, and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, Korea

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HAN-JONG RIM Departments of Medicine and Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Molecular Parasitology, Sungkyunkwan University School of Medicine, Suwon, Korea; Department of Parasitology and Entomology, Heilongjiang CDC, China; Korea Association of Health Promotion, Seoul, Korea; Department of Parasitology and Tropical Medicine, and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, Korea

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SUNG-TAE HONG Departments of Medicine and Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Molecular Parasitology, Sungkyunkwan University School of Medicine, Suwon, Korea; Department of Parasitology and Entomology, Heilongjiang CDC, China; Korea Association of Health Promotion, Seoul, Korea; Department of Parasitology and Tropical Medicine, and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, Korea

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This prospective study was performed to evaluate the diagnostic usefulness of sonography in terms of the intensity of Clonorchis sinensis infection. Total 1,384 residents were subjected to this study at an endemic area in China, in which a clonorchiasis control program had been performed. History taking, fecal examination, and sonography were performed, and 87.8% of the subjects were found to be egg positive. Sonography showed intrahepatic bile duct dilatation (IHDD) in 68.4% of the subjects, increased periductal echogenicity (IPDE) in 24.5%, and gallbladder sludge (GBS) in 20.8%. Moreover, the grades of these sonographic findings were higher in subjects with heavier infections as determined by egg counts. IHDD was found to be the most accurate sonographic indicator of any infection degree (76.3), whereas IPDE and GBS were useful only in cases of heavy infection. Subjective symptoms were found to be only poorly correlated with sonographic findings or infection intensity.

Author Notes

Reprint requests: Sung-Tae Hong, Department of Parasitology and Tropical Medicine, and Institute of Endemic Diseases, Seoul National University College of Medicine, 28 Yongon-Dong, Jongno-Gu, Seoul 110-779, Korea, Telephone: 82-2-740-8343, Fax: 82-2-765-6142, E-mail: hst@snu.ac.kr.
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