• Parasites, Hosts and Diseases
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• 제43권1호
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• pp.1-5
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• 2005

The prevalence of parasitic infections was investigated in human immunodeficiency virus (HIV)-infected patients (n = 105) who visited Seoul National University Hospital, Seoul, Korea, during the period from 1995 to 2003. Fecal samples were collected from 67 patients for intestinal parasite examinations, and sputum or bronchoalveolar lavage samples from 60 patients for examination of Pneumocystis carinii. Both samples were obtained from 22 patients. Thirty-three ($31.4\%$) of the 105 were found to have parasitic infections; Cryptosporidium parvum ($10.5\%$; 7/67), Isospora belli ($7.5\%$; 5/67), Clonorchis sinensis ($3.0\%$; 2/67), Giardia lamblia ($1.5\%$; 1/67), Gymnophalloides seoi ($1.5\%$; 1/67), and Pneumocystis carinii ($28.3\%$; 17/60). The hospital records of the 11 intestinal parasite-infected patients showed that all suffered from diarrhea. This study shows that parasitic infections are important clinical complications in HIV-infected patients in the Republic of Korea.

• Parasites, Hosts and Diseases
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• 제58권1호
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• pp.87-91
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• 2020

Gymnophallid metacercariae found in the Manila clam Ruditapes philippinarum ('Banjirak' in Korean) from Gochang-gun, Jeollabuk-do, Korea were morphologically and molecularly confirmed to be Parvatrema duboisi (Dollfus, 1923) Bartoli, 1974. The metacercariae were morphologically characterized by having a large oral sucker, small ventral sucker, genital pore some distance anterior to the ventral sucker, no ventral pit, and 1 compact or slightly lobed vitellarium, which were all compatible with P. duboisi. Some of the metacercariae were experimentally fed to mice, and adult flukes were recovered at day 7 post-infection. The morphology of the adult flukes was basically the same as that of the metacercariae except for the presence of uterine eggs; the uterus was filled with up to 40 eggs. The nucleotide sequences (1,193 bp) from ITS regions (ITS1, 5.8S rDNA, and ITS2) of the metacercariae showed 99.7% identity with P. duboisi and 75.7% identity with Gymnophalloides seoi deposited in GenBank. These results confirmed the presence of P. duboisi metacercariae in the Manila clam R. philippinarum in an estuary region of Gochang-gun, Korea.

• Parasites, Hosts and Diseases
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• 제32권3호
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• pp.157-162
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• 1994

전라남도 신안군 도서지역의 한 작은 해안 마을이 유해이형흡충(Heterophyes nocens)의 농후한 인체 감염 유행지임이 우리 나라에서 최초로 확인되었다. 1989년부터 1990년에 걸쳐 마을 주민 230명 중 98명의 대변을 수집하여 셀로판후층도말법 및 포르말린-에테르 집란법을 병행하여 검사한 바 이형홉충류(heterophylds) 충란이 42명(42.9%)에서 검출되었다. 그러나 충란만으로는 이형흡충류의 종(species)을 진단할 수 없어 충란 양성자들에 대해 praziquantel 10mg/kg과 하제를 투여한 후 설사변으로부터 성충을 회수하였다. 충란 양성 자 42명 중 프라지콴텔 및 하제 투여에 협력한 18명 전원으로부터 충체 회수를 완료할 수 있었고, 유해이형흡충 충체 1-1, 124마리(총 4,730마리)를 수집할 수 있었다. 감염자들은 대부 분 다른 이형흡충류(Pygidiopsts summa, Stictodora fuscatum 등) 및 큰입흡충류 (gymnophallid) 특히 Gymnophalloides seoi에 중복 감염되어 있었다. 이번 연구 결과로 미루어 보아 유해이형흡충은 중간숙주인 숭어. 문절망둑 등을 즐겨 생식하고 있는 우리 나라 남 해안 및 서해안의 해안 마을에 널리 분포하고 있을 것으로 추측되었다.

• Parasites, Hosts and Diseases
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• 제48권2호
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• pp.133-138
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• 2010

Infection status of intestinal flukes was investigated in residents of Muan-gun, Jeollanam-do, the Republic of Korea. Total 1,257 fecal samples of residents were examined by formalin-ether sedimentation technique and Kato-Katz thick smear method. Helminth eggs were detected from 95 (7.6%) residents, and eggs of heterophyid flukes and Clonorchis sinensis were found from 62 (4.9%) and 40 (3.2%) cases, respectively. The larger heterophyid eggs, somewhat darkbrown in color and $37.7{\times}21.5{\mu}m$ in average size, and found in 32 (2.6%) out of 62 egg positive cases of heterophyid flukes. To confirm the adult flukes, we performed worm recovery from 12 cases after praziquantel treatment and purgation with $MgSO_4$. A total of 1,281 adult flukes, assigned to 7 species, were recovered from 9 cooperative cases. Heterophyes nocens (total 981 specimens) was collected from 9 cases, Stictodora fuscata (80) from 7, Gymnophalloides seoi (75) from 5, Pygidiopsis summa (140) from 3, Stellantchasmus falcatus (3) from 2, and Stictodora lari and Acanthotrema felis (each 1 worm) from 1 case each. The intrauterine eggs of S. fuscata collected from the recovered worm were identical with the larger heterophyid eggs detected in the stool examination. By the present study, it was confirmed that A. felis is a new intestinal fluke infecting humans, and residents in Muan-gun, Jeollanam-do are infected with variable species of intestinal trematodes.