• Parasites, Hosts and Diseases
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• 제52권1호
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• pp.1-7
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• 2014

Plasmodium vivax reemerged in the Republic of Korea (ROK) in 1993, and is likely to continue to affect public health. The purpose of this study was to measure levels of anti-P. vivax antibodies using indirect fluorescent antibody test (IFAT) in border areas of ROK, to determine the seroprevalence of malaria (2003-2005) and to plan effective control strategies. Blood samples of the inhabitants in Gimpo-si, Paju-si, and Yeoncheon-gun (Gyeonggi-do), and Cheorwon-gun (Gangwon-do) were collected and kept in Korea Centers for Disease Control and Prevention (KCDC). Out of a total of 1,774 serum samples tested, the overall seropositivity was 0.94% (n=17). The seropositivity was the highest in Paju-si (1.9%, 7/372), followed by Gimpo-si (1.4%, 6/425), Yeoncheon-gun (0.67%, 3/451), and Cheorwon-gun (0.19%, 1/526). The annual parasite incidence (API) in these areas gradually decreased from 2003 to 2005 (1.69, 1.09, and 0.80 in 2003, 2004, and 2005, respectively). The highest API was found in Yeoncheon-gun, followed by Cheorwon-gun, Paju-si, and Gimpo-si. The API ranking in these areas did not change over the 3 years. The seropositivity of Gimpo-si showed a strong linear relationship with the API of 2005 (r=0.9983, P=0.036). Seropositivity data obtained using IFAT may be useful for understanding malaria prevalence of relevant years, predicting future transmission of malaria, and for establishing and evaluating malaria control programs in affected areas.

• 한국어병학회지
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• 제25권3호
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• pp.231-241
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• 2012

2007년~2011년 하절기에 국내 동 서 남해안과 제주의 육상양식장, 가두리 및 축제식 양식장에서 사육중인 넙치 (Paralichthys olivaceus), 조피볼락 (Sebastes schlegeli), 참돔 (Pagrus major), 흰다리새우 (Litopenaeus vannamei) 의 총 2,413마리에 대하여 세균과 기생충의 감염현황을 조사하였다. 조사기간(2007년~2011년) 사이 어종별 병원체에 대한 감염양상을 종합하면, 기생충과 세균의 단독감염이 혼합 감염에 비하여 비교적 높게 나타났으며, 단독감염 가운데 기생충이 세균보다 감염률이 높은 경향을 나타내었다. 조사기간 동안 넙치, 조피볼락, 새우에서 Vibrio spp. (V. harveyi, V. ichthyoenteri, Vibrio sp.)가 가장 우점종으로 검출된 세균의 위치를 차지하였으며, 참돔에서는 Vibrio sp.와 P. damselae가 우점종 세균으로 검출되었다. 조사기간 동안 가장 우점종으로 검출된 기생충은 넙치에서 스쿠티카충 (M. avidus)과 트리코디나충 (Trichodina sp.), 조피볼락에서 아가미흡충 (M. sebastes), 참돔에서 아가미흡충 (M. tai), 새우에서 섬모충 (Zoothamnium sp.) 으로 나타났다.

• Parasites, Hosts and Diseases
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• 제60권3호
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• pp.187-193
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• 2022

The positive rate of Clonorchis sinensis is the highest among intestinal parasites in the Republic of Korea (Korea). More than 1.2 million people were at risk of C. sinensis infection in Korea in 2012. An intensive control program is being implemented for residents of the 5 major river basins to reduce helminthic infections, including C. sinensis infection. This study evaluated the continuous intensive control program for parasitic diseases including clonorchiasis in areas near the 5 major river basins in Korea over the past 10 years (2011-2020). A total of 335,020 fecal samples (one sample per resident) prepared by the modified sedimentation technic were microscopically examined. Those who expelled helminth eggs were treated with anthelmintics through local health centers and re-examined 3 months later. The overall positive rate of helminths egg was 7.1%. The annual positive rates were dramatically decreased from 14.4% (2011) to 5.9% (2020). The egg positive rate was highest in C. sinensis (5.3%), followed by heterophyid flukes (1.5%) and Trichuris trichiura (0.2%). The prevalence of C. sinensis was significantly higher in males (7.6%) than in females (3.7%), and the highest in the 50-59 years (7.0%) age group. Our results are beneficial to establish prevention and control policies against helminthiases including clonorchiasis in endemic areas in this country.

• Parasites, Hosts and Diseases
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• 제44권3호
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• pp.177-185
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• 2006

Soil-transmitted helminths (STH), namely Ascaris, Trichuris and hookworms (Ancylostoma and Necator), present a global health problem to about a half of the earth's population. In the Republic of Korea, STH were highly prevalent and were considered a high priority target for national control. To promote the control, a non-governmental organization named Korea Association for Parasite Eradication (currently Korea Association of Health Promotion) was founded in 1964, and mass fecal examination followed by selective mass chemotherapy with anthelmintics was performed twice a year from 1969 to 1995 targeting whole nationwide schoolchildren. Meanwhile, decreasing patterns of national STH infections have been monitored by 7 times' quinquennial national surveys targeting general population. In 1971, the overall intestinal helminth egg positive rate was 84.3% (Ascaris 58.2%, Trichuris 65.4%, and hookworms 10.7%), which became 63.2% in 1976, 41.1% in 1981, 12.9% in 1986, 3.8% in 1992, 2.4% in 1997, and 4.3% (Ascaris 0.03%, Trichuris 0.02%, and hookworms 0%) in 2004. During the control period, national economy rapidly developed, and living standards including environment, sanitation, and agricultural technology greatly improved, which undoubtedly boosted the STH control effects. Our experience indicates that social driving force to establish an eligible national control system to conduct repeated mass chemotherapy, together with improvement of environment and sanitation, is important for initiating and achieving STH control in a developing community.

• 환경위생공학
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• 제22권3호
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• pp.27-33
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• 2007

M. incognita are plant-parasite nematode that cause severe damage to the crops. P. lilacinus are renowned for inhibitation of development of M. incognita's egg. We make a study for enzymatic examining the cause closely that P. lilacinus suppress development of M. incognita's egg by parasiting. The research result is explained the place below. 1. The egg that is exposed to co-enzymes which are cultured in the broth culture starts to change the membrane of egg from 3days. And in 10days, that membrane completely disappear. These are observed through light microscope. Therefore, we know that M. incongnita are controlled by extracellular lytic enzymes that are produced by P. lilacinus. 2. Through scanning electron microscope, we can find that the egg that is attacked by P. lilacinus loses it's membrane gradually, and that loss of the membrane causes transform, which suppresses the development of egg.

• 한국응용곤충학회지
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• 제19권1호
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• pp.35-38
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• 1980

한국의 솔잎혹파리 유충기생봉으로 등뿔먹좀벌속의 1신종인 혹파리등뿔먹좀벌(신칭)을 기재보고하는 바이다. 혹파리등뿔먹좀벌(Inostemma hockparin. sp.)은 솔잎혹파리먹좀벌(Inostmma seoulis), 혹파리사리먹좀벌(Platygaster matsultama) 그리고 진해에서 채집된 혹파리반뿔먹좀벌(신칭) (Inostemma matsutama)과 함께 한국에서 출현하고 있는 솔잎혹파리의 유력한 유충기생봉이다.

• 한국수의병리학회지
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• 제7권1호
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• pp.5-9
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• 2003

Malignant catarrhal fever (MCF) is a systemic disease of ruminants caused by a gamma herpesvirus, ovine herpesvirus 2 (OvHV-2). Four 1-year old goats (Capra hircus), which were infected with MCF virus, OvHV-2, by being housed together with MCF virus-infected seep, were referred with a I-month history of chronic dermatitis. On the other hand, MCF virus-negative goats, which were isolated for negative control, had not those kinds of skin problems. Examination of the affected goats revealed generalized alopecia, patchy erythema, and superficial erosions with histologic evidence of mural folliculitis. Fungal culture tests and external parasite tests with the scraping skin samples were negative. However, polymerase chain reaction revealed the existence of MCF virus DNAs in the lesion. These results suggested that MCF virus may induce mural folliculitis and alopecia in goat.

• 한국건강관리협회지
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• 제1권1호
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• pp.26-32
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• 2003

The current status and future prospects of parasitic infections in Korea is briefly reviewed. Soil-transmitted helminth infections including ascariasis, trichuriasis, and hookworm infections decreased remarkably. owing to the national control activities excuted by the Korea Association of Health Promotion(formerly Korea Association of parasite Eradication) using mass heath education. Important recent trends include reemergence of vivax malaria since 1993, persistence of food-borne trematode infections including clonorchiasis and intestinal trematode infections, increased detection of zoonotic parasitosis, close-up of infection with opportunistic parasites including cryptosporidiosis, toxoplasmosis, and pneumosytosis, increase of imported tropical infectious disease, appearance of new parasitic disease such as gymnophalloidiasis, and increase of accidental infections with free-living amoebae. These trends represent greatly changed overall patterns of parasitic infections in Korea.

• 한국건강관리협회지
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• 제1권1호
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• pp.34-37
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• 2003

The NGO program of "intestinal parasite Control among primary Schoolchildren of Lao PDR", supported by KOICA and implemented by KAHP, has started in 1999 and will be executed until 2004. Under cooperation of the LAo Ministry of Health, WHO, Korean Embassy and KOCIA, for the last 4 years, KHIP has conducted parasitological survey throughout the country, supply of medical equipment and anti-helminthics and treatment of positive people. The results of the survey is as below : A total of 29,846 stool specimens were collected from primary schoolchildren from May 2000 to June 2002 and examined once with the cellphone thick smear. By species, the rate for Ascaris lumbricoides was 34.9%, hookworm 19.1%, Trichuris trihiura 25.8%, Opisthorchis iverrini 10.9%, Taenia spp. 0.6% and Hymenolepis spp. 0.1%. The northern mountainous regions showed a higher prevalence of soil-transmitted helminths. The regions along the Mekong River such as Khammuane, Saravane or Svannakhet Province showed a higher prevalence of fish-borne parasites.

• Parasites, Hosts and Diseases
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• 제52권4호
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• pp.345-353
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• 2014

Babesia gibsoni is an intraerythrocytic apicomplexan parasite that causes piroplasmosis in dogs. B. gibsoni infection is characterized clinically by fever, regenerative anemia, splenomegaly, and sometimes death. Since no vaccine is available, rapid and accurate diagnosis and prompt treatment of infected animals are required to control this disease. Over the past decade, several candidate molecules have been identified using biomolecular techniques in the authors' laboratory for the development of a serodiagnostic method, vaccine, and drug for B. gibsoni. This review article describes newly identified candidate molecules and their applications for diagnosis, vaccine production, and drug development of B. gibsoni.