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        • SCIESCOPUSKCI등재

          Parvatrema timondavidi (Digenea; Gymnophallidae) transmitted by a clam, Tapes philippinarum, in Korea

          유재란,채종일,이순형,Yu, Jae-Ran,Chae, Jong-Il,Lee, Sun-Hyeong The Korean Society for Parasitology 1993 The Korean Journal of Parasitology Vol.31 No.1

          반지락(Tapes philippinarurm)에서의 수집한 피낭유충을 동정하기 위하여 ICR계 마우스에 피낭유충을 경구감염시킨 다음 제 7일, 제 10일, 제 14일에 희생시키고 소장을 적출하여 충체를 회수하였다. 그 결과는 다음과 같다. 1.피낭유충은 작은 충체($312{\;}{\times}{\;}202{;\}{\mu\textrm{m}}$)가 피포하지 않은 상태로 감염되어 있고, 구홉반이 크고 잘 발달되었고 측명돌기가 관찰되었다. 장관은 이분지 되어 끝부분이 매우 부풀어 오른 맹관이었으며 복흡반까지 닿아 있었다. Ventral pit는 관찰되지 않았고 생식공은 원형으로 구홉반과 복합반 사이에 위치하였다. 배설낭은 V자 모양으로 두팔부분은 구홉반까지 닿아 있었다. 2.마우스 소장에서의 회수율 평균 20.1% 이었으며 감염 후 10일 째의 회수율이 가장 높았고 14일에는 현저히 간소하였다. 3.성충은 피낭유충과 크기의 차이가 없었다. 난황선은 한 개가 복합반의 왼쪽 옆에 위치하였다. 저장낭은 한부분으로 이루어져 있었고 복흡반보다 전방에 위치하였다. 고환은 한쌍으로 복흡반 후측장에 위치하였고 난소는 오른쪽 고환이 전방에 위치하였다. 충란은 길이 $28{;\}{\mu\textrm{m}}(27-30{;\}{\mu\textrm{m}})$, 폭 $19{;\}{\mu\textrm{m}}(17-20{;\}{\mu\textrm{m}})$으로 껍질이 매우 얇았으며 날개가 있었다. 이상의 결과로 반지락을 제2중간숙주로 하는 Parvatrema timondavidi(Digenea:Gymnophallidae)가 국내에 분포함을 확인하였다. Metaceriae of Parvatrema timondavidi (Digenea; Grmnophallidae) were found from Tapes phillippinarum, one of the most common marine clams in Korean. T. were philippinarum was collected from a fishery market in seoul, and all of the clams eximined were found to contain many gymnophyallid metacercariae. To get adult worms, 10 ICR mice were fed with 100 metacercariae each and sacrificed by cervical dislocation at 7, 10 and 14 mice were morphologically characterized by oval body shape, lage oral sucker with lateral located genital pore from the venttral sucker. Based on these characters they identified as P.timondawvidi Bartoli, 1964. this study first confirms the presence of P. timondawcidi metacercartae in T.philippinarum in Korea.

        • SCIESCOPUSKCI등재

          Unstable vivax malaria in Korea

          Ree, Han-Il The Korean Society for Parasitology 2000 The Korean Journal of Parasitology Vol.38 No.3

          Korean vivax malaria had been prevalent for longtime throughout the country with low endemicity. As a result of the Korean war (1950-1953), malaria became epidemic. In 1959-1969 when the National Malaria Eradication Service (NMES) was implemented, malaria rates declined, with low endemicity in the south-west and south plain areas and high endemic foci in north Kyongsangbuk-do (province) and north and east Kyonggi-do. NMES activities greatly contributed in accelerating the control and later eradication of malaria. The Republic of Korea (South Korea) was designated malaria free in 1979. However, malaria re-emerged in 1993 and an outbreak occurred in north Kyonggi-do and north-west Kangwon-do (in and/or near the Demilitarized Zone, DMZ) , bordering North Korea. It has been postulated that most of the malaria cases resulted from bites of sporozoite-infected females of An. sinensis dispersed from North Korea across the DMZ. Judging from epidemiological and socio-ecological factors, vivax malaria would not be possible to be endemic in South Korea. Historical data show that vivax malaria in Korea is a typical unstable malaria. Epidemics may occur when environmental, socio-economical, and/or political factors change in favor to malaria transmission, and when such factors change to normal conditions malaria rates become low and may disappear. Passive case detection is a most feasible and recommendable control measure against the unstable vivax malaria in Korea in cost-effect point of view.

        • SCIESCOPUSKCI등재

          Experimental induction of the two-host life cycle of Sarcocystis cruzi between dogs and Korean native calves

          Wee, Sung-Hwan,Shin, Sung-Shik The Korean Society for Parasitology 2001 The Korean Journal of Parasitology Vol.39 No.3

          Eight dogs were experimentally infected with Sarcocystis by oral inoculation of cardiac muscle from naturally infected cattle. The infected dogs commenced discharging of sporocysts in the feces after 10 to 12 days of inoculation, and continued until 20 and 35 days after inoculation. Three dogs were reinfected with cardiac muscle from the naturally infected cattle. Sporocysts reappeared in the feces on 12 to 13 days after reinfection. Sarcosystis sporocysts collected from the experimentally infected dogs were fed to each of the two 30-day-old Korean native calves. The infected calves remained clinically normal, except for the high fever (${\geq}{\;} 40^{\circ}C$) and decreased hematocrit values on day 30 to 40 post inoculation. Muscular cysts of Sarcocystis were found from infected calves on day 40 post inoculation. Proliferative forms of Sarcocystis were also observed in the muscle of infected calves. These results suggest that the Sarcocystis cruzi found in Korean native cattle has a 2-host life cycle with dogs as the definitive host and Korean native calves as the intermediate host.

        • SCIESCOPUSKCI등재

          Non-specific activation of mouse peritoneal macrophages by a freshwater ciliate, Tetrahymena pyriformis

          Jung, Young-Hun,Kim, Ki-Sun,Chung, Pyung-Rim The Korean Society for Parasitology 2000 The Korean Journal of Parasitology Vol.38 No.2

          Toxoplasma-killing activities of mouse peritoneal macrophages activated by the extracts of Tetrahymena pyriformis (Korean and Chinese strains) were evaluated, and the active protein fractions from both strains were partially characterized by a method including chromatographies and SDS-PAGE. The first peak in Korean strain and the second peak in Chinese strain of T. pyriformis obtained by DEAE-Sephadex A-50 chromatography were most effective in the activation of macrophages to kill Toxoplasma gondii tachyzoites in vitro. Subsequent fractionations of obtained peak fractions were performed on a Sephadex G-200 gel. The first peaks fractionated from both strains of T. pyrtyomis had the highest toxoplasmacidal activities, and when subjected to the SDS-PAGE, one prominent band was visualized for each of the strains showing the same molecular weight of ca. 52.6 kDa. This active protein is suggested to be related to non-specific activation of mouse peritoneal macrophages.

        • SCIESCOPUSKCI등재

          Analysis of polymorphic region of GAM-1 gene in Plasmodium vivax Korean isolates

          Kho, Weon-Gyu,Chung, Joon-Yong,Hwang, Ui-Wook,Chun, Jin-Ho,Park, Yeong-Hong,Chung, Woo-Chul The Korean Society for Parasitology 2001 The Korean Journal of Parasitology Vol.39 No.4

          The identification , characterization and quantification of Plasmodium sp. genetic polymorphism are becoming increasingly important in the vaccine development. We investigated polymorphism of Plasmodium vivax GAM-1 (PvGAM-1) gene in 30 Korean isolates. The polymorphic region of the PvGAM-1 gene, corresponding to nt 3792-4029, was amplified using polymerase chain reaction (PCR) followed by sequencing. All of the P. viuax Korean isolates were one type of GAM-1 gene, which were identical to that of the Belem strain. It is suggested that PvGAM-1 could not be used as a genetic marker for identifying or classifying P. vivax Korean isolates. It revealed that the polymorphic pattern as acquired basically by duplication and modification or deletion event of a 33 bp-motif fragment ended by poly guanine (G) and that there were at least three complete and one partial 33 Up-motif sequences within the polymorphic region in the longest cases such as those of South Korean and Belem isolates. In addition, we clustered P. vivax isolates with parsimonious criteria on the basis of PvGAM- 1 polymorphic patterns (insertion/deletion patterns) .

        • SCIESCOPUSKCI등재

          Classification and host specificity of Metagonimus spp. from Korean freshwater fish

          임한종,김기홍,주경환,Im, Han-Jong,Kim, Gi-Hong,Ju, Gyeong-Hwan The Korean Society for Parasitology 1996 The Korean Journal of Parasitology Vol.34 No.1

          한국인에 널리 유행하는 Metagonimus속 흡충류의 분류학적 문제점들을 해결하기 위해 다양한 지역에서 채집한 여러 종의 민물어류로부터 Metugonim속 피낭유충을 검출하여 햄스터에 감염 실험을 하였다. 감염실험 결과 은어는 기존에 알려져 있던 M. yokogawnia 피낭유충 외에 M. tokqhashii의 피낭유충에도 감염되어 있는 것이 밝혀졌으며 붕어에는 M. takohoshii의 피낭유충만 이 감염되어 있었다 피라미, 끄리, 갈겨니등에서 검출된 Metqgonim속 피낭유충의 감염실험 결과, 이들 어종은 모두가 Metosonim Miyata type의 피낭유충에만 감염되어 있는 것으로 나타났다. Metagonimus Miyata type의 성충은 여러 가지 특징 및 숙주특이성 등에 의해서 다른 두 종과 구별되었으며. 그 분류학적 위치에 대해서 몇 가지 가능성을 고찰하였다. Taxonomic problems of Metagoninus spry. in Korea were investigated. Metacercariae of various freshwater fish species - PlecoBlossus cltiuelis, Carnssius aurctus, Zacco platypus, Zncco temmincki, Opscriichthws bidens - were collected from different localities in Korea and experimentally fed to golden hamsters. Observation of recovered adult worms showed that PLeco91ossus nltiuelis was infected with metacercariae of both M. vokognwni and M. toknhoshii. C. auratus was infected with metacercariae of M. takchcshii and Z. platvpf, Z. temmincki, O. binens were infected only with metacercariae of Metofonimuf Miyata type. From the inferences about the morphological characteristics, host specificities and occurrence patterns in infected animals, Metogonimus Miyata type is considered to be an independent group.

        • SCIESCOPUSKCI등재

          긴이형흡충(Heterophyopsis continua)의 새로운 중간숙주인 붕장어(Conger myriaster)

          김기홍,최은석,임한종,Kim, Gi-Hong,Choe, Eun-Seok,Im, Han-Jong The Korean Society for Parasitology 1996 The Korean Journal of Parasitology Vol.34 No.4

          196년 9월 7일 전남 목표항에서 구입한 붕장어의 아가미 새엽에서 6개체의 피낭유충이 검출되었다. 이중 탈낭된 한 개의 형태를 관찰한 바 긴이형흡충의 피낭유충으로 동정되었으며, 붕장어가 긴이형흡층의 제2중간숙주 역활을 한다는 것으로 보고있다. Six metacercariae were found from the gill filaments of Conger myriaster purchased at Mokpo-shi in korean on September, 1996. Based on the morphology of the excysted specimen. we identified them as metacercariae of Heterophyosis continua, C. myriaster is a new intermediate host H. continua in the literature.

        • SCIESCOPUSKCI등재

          A human case of invasive fascioliasis associated with liver abscess

          김진봉,김동준,허선,조승열,KIM, Jin-Bong,KIM, Dong-Joon,HUH, Sun,CHO, Seung-Yull The Korean Society for Parasitology 1995 The Korean Journal of Parasitology Vol.33 No.4

          강원도 홍천에 거주하는 56세 구부가 갑자기 우상부 복통 고열 오한을 주소로 내원하였고 복 꾸 초음파검사와 콤퓨터단층촬영 결과 2-3 cm 직경의 불규칙한 꼴의 동공이 간 우엽에서 여러개 관찰되었다. 간생검상 샤르코-라이덴 결정을 포함한 심한 중심성 괴사 주위로 조직구. 호산구등 염 증세포가 침윤되어 주위 조직과 명확히 구분되었다. 효소면역측정법을 이총한 간질 특이 항체 혈청 걸사에서 양성이었다. 간 병변은 프라지관텔 투약 6개웍 후에 모두 사라졌으나. 특이 항체가와 호산구 증가는 투약 6개월 16개월 후에도 정상화 되지 않았다. 방사선학적 소견 조직병리학 소견 및 혈청학 검사 결과를 종합할 때. 초기 침습성 간질증으로 진단하였으며 프라지콴텔에 의하여 치료되지 않은 예이었다. A 56 year-old Korean housewife/farmerlgoat keeper suffered from right upper quadrant pain and fever with chills. In the abdominal sonogram and computerized tomography, multiple, 2-3 cm, irregular shaped cavities were observed in the right lobe of liver. A liver biopsy revealed extensive central necrosis with Characot-Leyden crystals surrounded by palisading histiocytes, eosinophil-rich inflammatory infiltration. Worm was not observed. However, the serologic test for Fusciola-specific IgG antibody by micro-ELISA was positive. Prior antibody levels did not differ and eosionophilia persisted 6 and 16 months after praziquantel treatment although the cavitaxy lesions in the liver disappeared 6 months after the treatment. Reported herein is a human case of invasive fascioliasis diagnosed clinically by a combination of radiological, histopathological and serological studies.

        • SCIESCOPUSKCI등재

          Prevalence of arthropod antibodies in Korean patients with allergic rhinitis

          Hwang, Kyu-Yoon,Park, Joon-Soo,Ahn, Hyun-Cheol,Nam, Hae-Seon The Korean Society for Parasitology 2001 The Korean Journal of Parasitology Vol.39 No.2

          Arthropod antigens are main causative agents which induce allergic reponses in humans. However. little information is known about the prevalence of specific arthropod allergens in Koreans with allergic diseases. The current study was designed to determine the positive rates of arthropod antibodies by the Korean inhalant panel of MAST-CLA. One hundred sixty patients, who were diagnosed with allergic rhinitis from an out-patient center at the Soonchunhyang University Chunan Hospital, were studied between August 1998 to July 2000. The overall positive rate, at least more than one specific antibody of arthropods such as Dermatophagoides farinae (Df), Dermatophagoides pteronyssinus (Dp), and cockroach mix (Cm) , was 46.9%. Each positive rate of Df, Dp, and Cm was 45.0%, 43.1%, and 8.8%, respectively. A significant agreement among arthropod allergens was observed (Df and Dp: 95.6%, Kappa : 0.911, P < 0.001). Our data supported the fact that arthropods were the most common allergens in Korean patients with allergic rhinitis; however, the MAST-CLA should be modified to increase specificity of arthropod allergens .

        • SCIESCOPUSKCI등재

          Detection of IgG antibody against Neospora caninum in cattle in Korea

          Bae, Ji-Seon,Kim, Dae-Yong,Hwang, Woo-Suk,Kim, Jae-Hoon,Lee, Nam-Seok,Nam, Ho-Woo The Korean Society for Parasitology 2000 The Korean Journal of Parasitology Vol.38 No.4

          A total of 492 cattle sera was screened by IgG-ELISA against Neospora caninum (Nc-1 strain and a Korean isolate, KBA-2) and Toxoplasna gondii. Out of 492, 113 sera (23.0%) reacted positively to either Nc-1 or KBA-2 strains of N. caninum. Among the 113 positive sera, 92 sera (81.4%) reacted with antigens of both strains, but 6 sera (5.3%) with Nc-1 and 15 sera (13.3%) with KBA-2 strain only And with T. gondii antigen, 6 sera (1.2%) were positive but all reacted with N. caninum antigen also. Western blot revealed typical binding pattern according to ELISA values, such that high OD group reacted specifically to the major surface proteins including 43 kDa protein. Seroprevalence of 23.0% indicates that neosporosis seemed to be one of major causes of abortion in cattle. It is suggested here to establish more epidemiological researches nationwide systematically.

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