• 농촌의학ㆍ지역보건
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• 제10권1호
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• pp.36-41
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• 1985

To evaluate the parasitic infection rates among inhabitants in urban area of Seoul, Korea, a total of 5,275 stool and anal swab specimens was obtained from 2,527 male and Z,748 female living in 24 Dongs of 17 Kus. Cases were sampled randomely to represent 1,000 inhabitants refereed to the census in 1980. The methods employed were formalin ether technique to detect helminth ova and protozoan cysts and scotch tape anal swab technique to detect eggs of Enterobius vermicularis. The results obtained are as follows ; 1) Total positive rate of helminthes was 23.5% among 5,275 (male 22.5% and female 24.5%) specimens. Nine kinds of the helminthes were detected and infection rates of each helminth were; Ascaris lumbricoides 4.1%, Hookworm 0.1%, Trichuris trichiura 11.1%, Trichostrongylus orientalis 0.1%. Clonorchis sinensis 1.2%, Metagonimus yokogawai 0.1%, Taenia spp. 0.2%, Hymenolepis nana 0.3 and Enterobius vermicularis 9.6%. 2) Total positive rate of intestinal protozoa was 1.4%. Four kinds of the protozoan cysts were detected and the infection rates of each protozoa were; Entamoeba histolytica 0.15%, E. coli 0.4%, Endolimax nana 0.04% and Giardia lamblia 0.89%. 3) No significant differences in the parasitic infection rate by sex was noticed although male group showed lower infection rate than female group. However the incidence of C. sinensis, M. yokogawai and Taenia spp. was twice as much in female group as in male group. 4) No difference in the infection rate by age was found although E. vermicularis positive rate was highest in "0~9 years group" by 2.1% and C. sinensis infection rate was higher in over "30~39 years group". The parasitic infection rate of the present study was significantly lower than those of previous reports in Seoul area and other provinces.

• Parasites, Hosts and Diseases
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• 제53권1호
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• pp.13-19
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• 2015

Blastocystis sp. is a common zoonotic intestinal protozoa which has been classified into 17 subtypes (STs). A cross-sectional study was conducted to determine the prevalence and subtype distribution of Blastocystis in villagers living on the Thai-Myanmar border, where the risk of parasitic infection is high. A total of 207 stool samples were collected and DNA was extracted. PCR and sequencing using primers targeting small-subunit ribosomal RNA (SSU rRNA) gene were performed. The prevalence of Blastocystis infection was 37.2% (77/207). ST3 (19.8%; 41/207) was the predominant subtype, followed by ST1 (11.6%; 24/207), ST2 (5.3%; 11/207), and ST4 (0.5%; 1/207). A phylogenetic tree was reconstructed using the maximum likelihood (ML) method based on the Hasegawa-Kishino-Yano + G + I model. The percentage of bootstrapped trees in which the associated taxa clustered together was relatively high. Some sequences of Blastocystis positive samples (TK18, 39, 46, 71, and 90) were closely related to animals (pig and cattle) indicating zoonotic risks. Therefore, proper health education in parasitic prevention for the villagers should be promoted to improve their personal hygiene. Further longitudinal studies are required to monitor the prevalence of parasitic infections after providing health education and to investigate Blastocystis ST in animals living in these villages.

• 대한의생명과학회지
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• 제2권2호
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• pp.267-274
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• 1996

익산시내 거주하는 일부 아동들의 장내 기생충 감염 상태를 조사하기 위하여 4세부터 8세사이의 유치원생과 초등학교 1∼2학년 학생 510명(남 276명 ,여 234명)을 대상으로 formalin-ether 침전법과 trichrome염색법으로 대변검사를 실시하였다. 장내 기생 윤충란 및 완충류의 포낭 양성자는 62명 (12.2%)이었으며, 윤충란 양성자는 3명(0.6%), 원충 포낭 양성자는 59명(11.6%)이었다. 성별 양성율은 남자(11.2%)보다 여자(13.2%)의 양성율이 다소 높았으며, 년령별 양성율은 7세군이 17.5%로 가장 높았고 4세군은 9.5%로 양성율이 가장 낮았다. 3종의 윤충란과 6종의 원충 포낭을 검출하였으며, 윤충란은 요꼬가와흡충란 0.4%, 요충란 0.2% 및 편충란 0.2%였고, 원충의 포낭은 왜소아메바 4.1%, 대장아메바 3.9%, 람블편모충 2.0%, 이질아메바 1.4%, 옥도아메바 0.8% 및 메닐편모충 0.4%였다. 윤충란 양성자 3명 중 단일종 감염이 2명(66.7%), 2종 감염은 1명(33.3%)이었으며, 원충류포낭 양성자 59명 중 단일종 감염이 54명(91.5%), 2종 감염은 5명(8.5%)이었다. 연령별 원충 포낭의 양성율은 7세군이 14.3%로 가장 높았으며 4세군은 9.5%로 가장 낮았다.

• 한국자연치유학회지
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• 제11권2호
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• pp.136-142
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• 2022

배경: 본 연구는 1970년 때부터 현재까지 우리나라의 기생충 감염률의 변화와 관리에 대한 고찰은 자연치유적 관점에서도 필요하다고 본다. 목적: 연구 목적은 감염률이 어떠한 방법에 따라서 감소율의 변화가 현재까지 진행되었는지를 고찰해보는 것이었다. 방법: 문헌 조사를 하였다. 결과: 우리나라는 1970년대까지는 기생충 감염률이 가장 높은 국가 중 하나였다. 감염률을 관리하기 위하여 1966년에는 기생충병 예방법을 제정하였고, 1969년부터 전국적인 기생충 관리 국가사업을 전체 학생을 대상으로 1년에 2회 전체 기생충 충란 양성자에 대한 치료를 1995년까지 수행하였다. 정부는 한국기생충박멸협회에 위탁하여 구충 박멸사업을 2년 간격으로 1971년~2012년까지 8차례를 전국 기생충감염 실태조사를 하였다. 그 결과로 1971년에는 전체 기생충 충란 양성률이 84.3%이었으나 2012년에는 2.6%로 감소하였다. 회충, 폐흡충, 조충 및 장내 원충류는 전국적으로 매우 감소하였다. 결론: 우리나라에서의 성공적인 기생충 관리는 국가적 경제성장력의 증진과 동시에 기생충박멸에 대한 사회적 합의와 개선된 전문적인 기생충 예방지침과 유효한 구충제 공급 등이 체계적으로 관리하여 성공적인 효과를 이루었다고 판단한다. 그리고 자연치유적 관점에서도 중요하다고 생각한다.

• 한국가금학회지
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• 제26권3호
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• pp.149-170
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• 1999

Protozoa of the genus Eimeria are the etiologic agents of avian coccidiosis, the most economically important Parasitic disease for the poultry industry. Coccidia multiply in intestinal epithelial cells of a wide range of hosts, including livestock in addition to poultry. Chemotherapy is extensively used to control coccidiosis. However, development of drug resistance by Eimeria parasites, the intensive cost and labor involved in the identification of new anticoccidial compounds and public awareness of drug residues in foods warrant alternative methods to prevent coccidiocic in the fast growing poultry industry. For these reasons, there is a great interest in developing vaccines against avian coccidiosis. Live Eimeria vaccines confer protective immunity, however a significant disadvantage of using these types of vaccines is their pathogenicity. Live parasites with attenuated pathogenicity also usually produce immunity but may revert back to a pathogenic form and may be contaminated with other pathogenic organisms. Killed Eimeria vaccines are safer but, unlike live attenuated vaccines, are not able to generate cytotoxic T lymphocyte responses. Recombinant vaccines are biochemically purified proteins produced by genetic engineering that consist of particular epitopes or metabolites of Eimeria. Unlike live attenuated organisms, recombinant vaccines do not possess as much risk and generally are able to induce both humoral and cell mediated immunity. DNA vaccines consist of genes encoding immunogenic proteins of pathogens that are directly administered into the host in a manner that the gene is expressed and the resulting protein generates a protective immune response. Although all of these different types of vaccines have been applied to coccidiosis, this disease continues to cause substantial morbidity and mortality in the poultry industry. Future development of an effective vaccine against coccidiosis will depend on further investigation of protective immunity to Eimeria infection and identification of important immundgenic parasite molecules.