• 농촌의학ㆍ지역보건
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• 제5권1호
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• pp.46-48
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• 1980

A case of sparganosis was presented. Sparganosis is not infrequent tissue helminthiasis in Korea and the incidence has been evidently increased. The patient was a 50-year-old Korean male who had a habit of eating raw flesh of fresh water fish. He first noticed the appearance of two peanut-sized masses in the right subcostal region, however, the two masses enlarged gradually to a pigeon egg size during 5 years. On surgical exploration, one larva (61 cm in length and 4 to 6 mm in width) from two masses was extracted. It was moved actively in warm physiological saline solution.

• Parasites, Hosts and Diseases
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• 제46권1호
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• pp.41-43
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• 2008

The ruddy turnstone, Arenaria interpres interpres, a migratory Korean bird, was proved to be a natural definitive host for Gynaecotyla squatarolae (Digenea: Microphallidae). The ruddy turnstone was found dead at the seashore of Okgu-eup, Gunsan-si, Jeollabuk-do. The intestinal tract was examined, and 98 unknown flukes were recovered. The worms were $600{\times}284{\mu}m$ in size, and had 2 ventral suckers. The seminal vesicle was large, the genital atrium was prominent, and the average egg size was $20{\times}12.5{\mu}m$. Based on these results, the worms were identified as G. squatarolae. This is the first report on the ruddy turnstone as a natural definitive host of G. squatarolae in the Republic of Korea.

• 의학교육논단
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• 제25권1호
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• pp.80-82
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• 2023

• Parasites, Hosts and Diseases
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• 제30권4호
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• pp.277-282
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• 1992

국내에서 카리니주폐포자충(Pneumocystis carinii, 이하 Pc) 연구에 적합한 동물모델을 개발하고자, 총 7종류 의 실험동물(흰쥐, 기니픽, 햄스터, 개, 고양이, 토끼 및 돼지)에 methyl prednisolone(Depomedrol", Korea Upiohn Ltd.)을 주사하여 면역억제를 유발하고 폐를 슬라이드 글라스에 문질러 도말표본을 만들었다. 도말표본을 Diff Quik 염색 후 광학현미경으로 관찰하여 Pc의 감염전도를 음성 (0), 0.5+, 1+, 2+ 및 3+의 5등급으로 구분하였다. 실험동물 중 흰쥐에서만 Pc폐염이 유발되고 다른 동물에서는 Pc를 관찰하지 못하였다. 대부분 의 동물은 전신쇠약의 증세를 보였으며, 대체로 면역억제 6주경부터 사망하기 시작하였다. 흰쥐의 경우 실험한 세 계통 모두에서 감염을 확인하였다. Sprague-Dawley 흰쥐의 경우 총 136마리 중 86마리63.2%)가 Pc 감염 되었고, Fisher 휜쥐는 76마리 중 63마리 (82.9%)에서, Wistar 흰쥐는 106마리 중 77마리 (72.6%)에서 Pc 감염 이 양성이었다. 감염정도와 시기에서도 차이가 있어서 Wistar 흰쥐에서 더 이른 시기에 높은 감염정도로 관찰되었다. 이상의 결과에 의하면 Pc 병원체를 얻기에는 흰쥐 세 계통 중 Wistar 흰쥐가 Pc연구에 가장 적합한 실험동물이고 그외의 실험동물은 Pc 감염에 적합하지 않음을 확인하였다.

• Parasites, Hosts and Diseases
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• 제33권2호
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• pp.125-130
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• 1995

소화불량을 주소로 내원한 38세 남자의 초음파 촬영과 전산화단층촬영 소견에서 간의 낭종이 발 견되어 낭종적출술을 시행하였다. 낭종은 성공적으로 적출되었으며, 현미경 하에서 낭액 내에 살아 움직이는 단방조충(Echinococcus granulosus)의 protoscolek가 다수 관찰되었다. 그러나, 수술중 낭종이 터져 낭액의 유출이 있었다. 술후 환자는 albendazole을 투약받았으며, 아나필락시스 등 합병증은 관찰되지 않았다 환자는 1982년부터 3년간 사우디아라비아에서 근무한 적이 있었다. 이 환자는 국내에서 확진된 단방포충 낭종증의 제16례로, 수술 중 낭종이 터졌으나 아나필락시스를 일으키지 않은 1례이었다.

• Parasites, Hosts and Diseases
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• 제51권4호
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• pp.433-440
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• 2013

Toxocariasis is a worldwide zoonosis caused by larvae of ascarid nematodes of dogs or cats, Toxocara canis or T. cati. Diagnosis of human toxocariasis currently relies on serology that uses T. canis excretory-secretory antigen to detect specific IgG antibodies by ELISA. We investigated the serodiagnostic efficacy of ELISA using crude antigen of T. canis larvae (TCLA). Serum specimens of 64 clinically confirmed toxocariasis, 115 healthy controls, and 119 other tissue-invading helminthiases were screened by ELISA using TCLA. The ELISA using TCLA showed 92.2% (59/64 patient samples) sensitivity and 86.6% (103/119) specificity. Its positive diagnostic predictivity was 78.7% and negative predictivity was 97.8%. No serum of healthy controls reacted but that of anisakiasis (45.5%), gnathostomiasis (19.2%), clonorchiasis (15.8%), sparganosis (11.1%), and cysticercosis (6.3%) cross-reacted. Immunoblot analysis on TCLA recognized antigenic proteins of 28- and 30-kDa bands in their dominant protein quantity and strong blotting reactivity. The present results indicate that the ELISA using our TCLA antigen is acceptable by the sensitivity and specificity for serodiagnosis of human toxocariasis. ELISA with TCLA is recommended to make differential diagnosis for patients with any sign of organ infiltration and eosinophilia.

• Parasites, Hosts and Diseases
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• 제55권1호
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• pp.21-29
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• 2017

Schistosoma haematobium is a biocarcinogen of human urinary bladder (UB). The present study investigated developing UB cancer mouse model by injecting S. haematobium eggs into the bladder wall and introduction of chemical carcinogens. Histopathological findings showed mild hyperplasia to epithelial vacuolar change, and high grade dysplasia. Squamous metaplasia was observed in the S. haematobium eggs+NDMA group at week 12 but not in other groups. Immunohistochemistry revealed significantly high expression of Ki-67 in urothelial epithelial cells of the S. haematobium eggs+BBN group at week 20. The qRT-PCR showed high expression of p53 gene in S. haematobium eggs group at week 4 and S. haematobium eggs+BBN group at week 20. E-cadherin and vimentin showed contrasting expression in S. haematobium eggs+BBN group. Such inverse expression of E-cadherin and vimentin may indicate epithelial mesenchymal transition in the UB tissue. In conclusion, S. haematobium eggs and nitrosamines may transform UB cells into squamous metaplasia and dysplasia in correlation with increased expression of Ki-67. Marked decrease in E-cadherin and increase in p53 and vimentin expressions may support the transformation. The present study introduces a promising modified animal model for UB cancer study using S. haematobium eggs.

• 농촌의학ㆍ지역보건
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• 제5권1호
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• pp.40-45
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• 1980

Paragonomiasis is a common trematodiasis of medical importance and one of public health. problems in many araes af southern part of Korea. Authars carried out the survey for human paragonimiasis in Ung Chi Myun, Bo Sung Gun during 1968 to 1979 by the use of intradermal screening test with veronal buffered saline antigens. In 1968 and 1978, inhabitants of all age groups in Ung Chi Myun were examined. In 1979, 1, 119 consisting of primary school children and middle school students in Ung Chi Myun and 521 high school students in Beol Gyo Eup were examined. The following results were obtained in this survey. 1) In 1968, 136 inhabitants were showed 61.0% positive reaction (66.3% in male, 53.6% in female). The positive rates were similar in each age groups. 2) In 1978, 207 Inhabitants were showed 32.9% positive reaction (36.3% in male, 29.4% in female). The positive rate was shown as high as 30% in the age groups of over 10 years old. 3) In 1979, primary school children and middle school students in Ung Chi Myun were showed 15.8% positive reaction and high school students in Beol Gyo Eup were showed 6.9% positive reaction.

• 농촌의학ㆍ지역보건
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• 제5권1호
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• pp.34-39
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• 1980

Paragonimiasis is a common trematodiasis of medical importance and one of public health problems in many areas of southern part of Korea. During the last sixty years, several surveys on the prevalence among the Korean population has been carried out by various investigators, although the general distribution and prevalence of paragonimiasis are not yet clearly determined. This study was undertaken to evaluate the status of human paragonimiasis in Chang Heung Gun by the use of intradermal screening test with Veronal buffered saline antigen. The following results were obtained in this srvey; 1) In the result of 1,654 inhabitants in Kwan San Myun, the positieve rate was shown 33.8% as a whole(34.1% in male. 33.5% in female). 2) In the result of 1,611 inhabitants iin Dae Duck Myun, the positive rate was shown 38.4% as a whole(39.3% in male, 36.4% in female). 3) In the result of 757 consisting of middle and high school students in Kwan San Myun, the positive rate was shown 7.0% as a whole.

• 농촌의학ㆍ지역보건
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• 제15권1호
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• pp.3-8
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• 1990

Seven specimens of salmon(Oncorhynchus keta) purchased directly, in Oct. 10. 1990, in the Taep'o port. Kang-won-do were examined for infection state of anisakid larvae and classification of extracted larvae according to morphological characters. The results were as follows. 1) From seven salmon 202 anisakid larvae were found, and mean infection number of anisakid larvae per individual salmon was 28.86. 2) From total extracted anisakid larvae 198 larvae(98%) were found in muscle. Therefore the distribution of anisakid larvae in intestine was extremely rare compared to in muscle. 3) The percentage of anisakid larvae in II, IV muscle region was 93% and from this we could surmise that most anisakid larvae in salmon did not penetrate to the very distanted muscle from intestine. 4) Three types of anisakid larvae(Anisakis Type I, Contracaecum Type B, Contracaecum Type D) were identified and, among them, Contracaecum Type B was the first recording type in Korea 5) Larvae of Contracaecum it genus were found only in intestine. Therefore it surmised that penetration neture to muscle of Contracaecum larvae was less than that of Anisakis Type I.