• 제목/요약/키워드: Hymenolepis nana

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Prevalence of Hymenolepis nana and H. diminuta from Brown Rats (Rattus norvegicus) in Heilongjiang Province, China

  • Yang, Di;Zhao, Wei;Zhang, Yichi;Liu, Aiqin
    • Parasites, Hosts and Diseases
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    • 제55권3호
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    • pp.351-355
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    • 2017
  • Hymenolepis nana and Hymenolepis diminuta are globally widespread zoonotic cestodes. Rodents are the main reservoir host of these cestodes. Brown rats (Rattus norvegicus) are the best known and most common rats, and usually live wherever humans live, especially in less than desirable hygiene conditions. Due to the little information of the 2 hymenolepidid species in brown rats in China, the aim of this study was to understand the prevalence and genetic characterization of H. nana and H. diminuta in brown rats in Heilongjiang Province, China. Total 114 fecal samples were collected from brown rats in Heilongjiang Province. All the samples were subjected to morphological examinations by microscopy and genetic analysis by PCR amplification of the mitochondrial cytochrome c oxidase subunit 1 (COX1) gene and the internal transcribed spacer 2 (ITS2) region of the nuclear ribosomal RNA gene. In total, 6.1% (7/114) and 14.9% (17/114) of samples were positive for H. nana and H. diminuta, respectively. Among them, 7 and 3 H. nana isolates were successfully amplified and sequenced at the COX1 and ITS2 loci, respectively. No nucleotide variations were found among H. nana isolates at either of the 2 loci. Seventeen H. diminuta isolates produced 2 different COX1 sequences while 7 ITS2 sequences obtained were identical to each other. The present results of H. nana and H. diminuta infections in brown rats implied the risk of zoonotic transmission of hymenolepiasis in China. These molecular data will be helpful to deeply study intra-specific variations within Hymenolepis cestodes in the future.

Heavy Hymenolepis nana Infection Possibly Through Organic Foods: Report of a Case

  • Kim, Bong Jin;Song, Kyung Seob;Kong, Hyun-Hee;Cha, Hee-Jae;Ock, Meesun
    • Parasites, Hosts and Diseases
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    • 제52권1호
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    • pp.85-87
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    • 2014
  • We encountered a patient with heavy Hymenolepis nana infection. The patient was a 44-year-old Korean man who had suffered from chronic hepatitis (type B) for 15 years. A large number of H. nana adult worms were found during colonoscopy that was performed as a part of routine health screening. The parasites were scattered throughout the colon, as well as in the terminal ileum, although the patient was immunocompetent. Based on this study, colonoscopy may be helpful for diagnosis of asymptomatic H. nana infections.

가축 및 실험동물의 비충류 감염에 대한 프라지관열($Cesocide^{\circledR}$ 주) 주사제의 치료효과 (Efficacy of Praziquantel ($Cesocide^{\circledR}$ injection) in Treatment of Cestode In(ections in Do%erotic and Laboratory Animals)

  • 엄기선;김승호;임한종
    • Parasites, Hosts and Diseases
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    • 제26권2호
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    • pp.121-126
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    • 1988
  • 프라지관텔 주사제의 조충류 피료 효과를 평가하였다. 개, 고양이, 산양, 사슴, 닭, 쥐 및 마우스 등 총 93마리 동물의 장관내에 기성하는 조충류 dipylidium caninum, Taenia pisiformis, Spirometra sp., Taenia taeniaeformis, Moniekia expanse, Moniexia sp., Raillietina sP. 및 인ymenolepis nana에 체중 kg당 프라지콴텔 12 mg, 9 mg, 6 mg, 3 mg, 1.5 mg을 대퇴부에 근육주사한 후 치료효과를 판정하였다. H. nana에 감염된 마우스는 6mg/kg 투여 후 3시 간부터 6시 간 사이에 충체를 배출하였다. 다른 조충류도 약제투여 48시 간 이내에 모두 체외로 배출되었다. H. nana 및 M. expansa를 제외한 모든 충체는 체외 배출시 심하게 손상되어 있었으며, D.cnninum의 충란낭은 붕괴되어 충란이 분리되었다. 조충의 종류와 감염강도 등에 따른 숙주 체중 kg당 투여 용량의 차이는 관찰되지 않았으며 Spirometra sp.에 감염되었던 한 마리의 개를 제외하고는 프락지관텔 6 mg/kg 1회 용량으로 완치되어 97.9% (46/47)의 치유율을 보임으로써 우수한 치료 효과를 나타내었다.

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Intestinal Parasites among Wild Rodents in Northern Gangwon-do, Korea

  • Lee, Young-Il;Pyeon, Hee-Jang;Seo, Min
    • Parasites, Hosts and Diseases
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    • 제51권5호
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    • pp.603-606
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    • 2013
  • To determine geographical patterns of natural parasite infections among wild rodents, a total of 46 wild rodents from 3 different localities in northern Gangwon-do (Province), Korea were examined for intestinal parasite infections. Along with nematodes such as hookworms and Syphacia spp., Plagiorchis muris (2 specimens) (Trematoda) were collected from striped field mice, Apodemus agrarius. In a Korean wood mouse, Apodemus peninsulae, the overall nematode infections were similar to A. agrarius, but an adult worm of Echinostoma hortense (Trematoda) was collected. In addition, 2 species of cestodes, i.e., Hymenolepis nana and Hymenolepis diminuta, were collected from A. agrarius. Through this survey, A. agrarius and A. peninsule were confirmed as the natural definite hosts for zoonotic intestinal helminths, i.e., P. muris, E. hortense, H. nana, and H. diminuta, in northern Gangwon-do, Korea. Considering increased leisure activities around these areas, seasonal and further comprehensive surveys on wild rodents seem to be needed to prevent zoonotic parasite infections.

일부 국군 장병의 최근 장내 기생충 감염 현황 (A Survey on Intestinal Parasites of Soldiers in Korea)

  • 홍성태
    • Parasites, Hosts and Diseases
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    • 제24권2호
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    • pp.213-215
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    • 1986
  • Total of 2,643 Korean soldiers were examined of their stool for parasitic infections by both cellophane thick smear and formalin-ether concentration techniques from August, 1983 to December, 1985. Out of them, 73.6% were free from any parasite, 22.6% were ova positive and 4.0% cyst positive. The ova positive rates by species were Ascaris lumbricoides 2.0%, Trichuris trichiura 13.0%, hookworm and Trichostrongylus orientalis 0.08% respectively, Clonorchis sinensis 7.6%, Metagonimus yokogawai 1.1%, Paragonimus westermani 0.08%, Echinostoma hortense 0.04%, Fibricola seoulensis 0.9%, Taenia sp. 0.3%, Hymenolepis nana 0.2% and H. diminuta 0.04%. Most of them (87.3%) were positive by a species, 11.9% by two and 0.8% by 3 species. The cyst positive rates were Entamoeba histolytica 0.6%, E. coli 1.4%, Endolimax nana 1.7%, Iodoamoeba butschlii 0.04% and Giardia lamblia 0.9%. Among the cyst positives, 89.5% were positive by a species, 7.6% by two and 0.5% by 3 species. The intestinal parasite infections among the Korean soldiers decreased distinctly compared with previous data.

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농촌주민(農村住民)의 기생충(寄生虫) 감염현황(感染現況) 조사(調査) (Survey on the Status of Helminthic Infections in Rural Area)

  • 임한종;이병권;이준상;주경환
    • 농촌의학ㆍ지역보건
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    • 제4권1호
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    • pp.81-89
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    • 1979
  • This study was undertaken to evaluate the present status of intestinal helminthic infection in rural areas of Korea from Dec. 1976 to Feb. 1979.The 4,311 stool specimens collected from 4 mountainous areas, 2 plain areas and 4 ri ver basins were examined. The methods employed were Kato's cellophane thick smear technique and brine fletation technique. The results are as follows. 1. The positive rate of intestinal helminch of any kind was 73.4%. It was 82.9% in river basins, 70. 2% in plain areas and 70. 4% in mountainous areas. 2. The positive rates of intestinal helmint.h were; Ascaris lumbricoides 42.5%, Trichocephalus trichiurus 51.4%, Hookworm 4.2%, Clonorchis sinensis 4.0%, Meta-gonimus yokogawai 5.7%, Hymenolepis nana 1.3%, Taenia species 1.0%, and Trichostrongyllus orientalis 1.2% respectively. 3. Sexual distribution of heiminthic infections showed higher rate in female than that of male except C. sinensis, H. nana, Taenia species, and. M. yokogawai. 4.Infection rates of T. trichiurus, Hook-worm and C. sinensis increased with age, but conversely H. nana were more prominent in younger age. 5. No geographical differen=e was noticed except that, M. yokogawai (20.9%), C sinensis (14.2%) in river basins ancl Taenia species (2.3%, by applying only stool examination) in mountainous areas were higher than the other 2 areas.

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마우스에 있어서 왜소조충 감염이 sRBC에 대한 면역능에 미치는 영향 (Effect of Humenolepis nana infection on immunological responses of mice to sRBC)

  • 이재구;육심용;박배근
    • Parasites, Hosts and Diseases
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    • 제27권1호
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    • pp.23-34
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    • 1989
  • 요 약 : 마우스에 있어서 왜소조충(Hymenolepis nana) 감염이 숙주의 비특이 면역반응에 미치는 영향을 조사하기 위하여 ICR계 마우스(20 g 정도)를 인공감염 군과 자연감염 군으로 나누어 인공감염 군의 일부는 최초 감염 후 15일째에, 자연감염 군은 실험 시작일에 프라지관텔(25mg/kg/day)을 3일 간 연속 투여하고 경시적으로 50일까지 면양 적혈구(sRBC) 감작에 대한 지연형 과민반응, 적혈구 응집소가 및 용혈소가, 말초혈액 내 호산구 출현률, 비장세포의 sRBC 로제트(로제트) 형성능, 항체처리 로제트 형성능 및 소장 점막 비만세포 출현빈도에 대하여 관찰하였다. 인공감염군에 있어서 지연형 과민반응은 감염 10일에 대조보다 일시적으로 현저히 저하하였다가 그 후 점차 상승하여 거의 정상으로 복귀하였다. 호산구 출현률은 왜소조충이 감염됨에 따라 대조보다 다소 상승하는 경향이었다. 적혈구 응집소가 및 용혈소가는 감염 초기에는 대조보다 다소 높은 값을 나타내었으나 감염 15일에 일시적으로 낮아졌다가 다시 거의 정상으로 복귀하였다. 로제트 및 항체 처리 로제트 형성능은 감염 15일에 대조보다 일시적으로 낮아졌다가 그 이후에는 점차 높아졌다. 비만세포 출현빈도는 감염후 시일 경과에 따라 점차 높아져 10일에 피이크에 이른 다음 그보다 약간 낮은 수준으로 계속 유지하였다. 인공감염군의 치료례에 있어서 지연형 과민반응과 호산구 출현률은 인공감염군에 비해 전반적으로 약간 떨어지는 경향이었으나, 로제트 형성능과 비만세포 출현빈도는 현저하게 저하하였다. 적혈구 응집소가, 용혈소가 및 항체처리 로제트 형성능은 인공감염 군에 비해 다소 높은 경향이었다. 한편, 자연감염 군에 있어서는 왜소조충 감염에 의해 높았던 지연형 과민반응, 비만세포 출현빈도 및 호산구 출현률 등이 치료 후에 점차 저하되어 대조와 거의 일치하였다. 또, 감염에 의해 낮았던 적혈구 응집소가 및 용혈소가는 치료 후 점차 상승하여 대조와 거의 일치하였는데 로제트 및 항체처리 로제트 형성능은 낮았던 값이 치료 후에도 계속 낮게 유지되었다. 이상의 실험결과로 미루어 보아 ICR계 마우스에 있어서 sRBC에 대한 면역능은 왜소조충 감염에 의해 일반적으로 활성화되는데 감염 후 10∼15일에는 일시적으로 저하된다는 것을 알 수 있었다.

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Endoparasites of Small Mammals in Edo State, Nigeria: Public Health Implications

  • Isaac, Clement;Igbinosa, Benjamin Igho;Ohiolei, John Asekhaen;Osimen, Catherine Eki
    • Parasites, Hosts and Diseases
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    • 제56권1호
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    • pp.93-100
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    • 2018
  • Some small mammals occur as household pests and harbour a number of parasites that could be of public health importance. This study profiled the helminth and protozoan parasites in trapped small mammals within and around human dwelling places (houses) located across 4 major towns (Auchi, Benin, Ekpoma, and Uromi) and environs in Edo state, Nigeria. Six genera (Apodemus sp., Crocidura sp., Mastomys natalensis, Mus musculus, Rattus sp., and Sorex sp.) were identified from 502 trapped small mammals. Overall, M. musculus (71.9%) and Rattus rattus (20.1%) were the most frequently trapped. In total, on examination of blood, gastrointestinal contents, and brain tissues, 12 helminth taxa (Angiostrongylus sp., Aspicularis sp., Capillaria sp., Gongylonema sp., Heterakis spumosa, Hymenolepis diminuta, Hymenolepis nana, Mastophorus muris, Moniliformis moniliformis, Nippostrongylus brasiliensis, Strongyloides sp., Trichosomoides sp., and Trichuris sp.), and 6 protozoan parasites (Babesia sp., Trypanosoma lewisi, Plasmodium sp., Eimeria sp., Isospora sp., and Toxoplasma gondii) were isolated. Most prevalent helminths with relatively heavy mean intensity were Strongyloides sp. and Heterakis spumosa, while Plasmodium, Eimeria, and Isospora were the most prevalent protozoan parasites. Generally, intrinsic factors like sex and age had marginal influence on the rate and burden of infection in M. musculus and R. rattus. Although the infection rate and prevalence of zoonotic parasites were low, they were largely recovered in rodents from Ekpoma. This study elucidates the public health implication of the presence of zoonotic parasites in these small mammals.

Intestinal Helminthic Infections in Striped Field Mice, Apodemus agrarius, from Two Southern Regions of Korea

  • Sohn, Woon-Mok;Na, Byoung-Kuk;Song, Hyeon-Je;Kim, Chung-Mo;Nam, Gi-Jin
    • Parasites, Hosts and Diseases
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    • 제52권4호
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    • pp.419-423
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    • 2014
  • The present study was performed to know the infection status of intestinal helminths in a most common species of field mice, Apodemus agrarius, from 2 southern regions of Korea. Total 133 and 103 mice were collected by the mouse trap in Hapcheon-gun, Gyeongsangnam-do and Gurye-gun, Jeollanam-do, respectively, from July 2005 to June 2006. The small intestine of each mouse was resected and longitudinally opened with a pair of scissors. The intestinal contents were washed with 0.85% saline until the supernatant became clear. Helminths were collected with naked eyes or under a stereomicroscope from the sediment of the intestinal content. More than 11 species of helminths (4 nematode spp., 5 trematode spp., and 2 cestode spp.) were recovered. Among these, heligmosomoid nematodes (97.5%) was the most highly and heavily infected species. As the members of trematodes, Plagiorchis muris, Brachylaima sp., Echinostoma hortense, Echinostoma cinetorchis, and unidentified echinostome larvae were found in the small intestines of 35 (14.8%), 12 (5.1%), 6 (2.5%), 1 (0.4%), and 1 (0.4%) mice respectively. Two species of tapeworms, Hymenolepis nana and Hymenolepis diminuta were also detected in 79 (33.5%) and 21 (8.9%) mice, respectively. Conclusively, heligmosomoid nematodes were the most prevalent (dominant) species among more than 11 helminth species detected, and Brachylaima sp. fluke is newly added in the list of intestinal trematodes in Korea.

Epidemiological Survey on Schistosomiasis and Intestinal Helminthiasis among Village Residents of the Rural River Basin Area in White Nile State, Sudan

  • Lee, Young-Ha;Lee, Jin-Su;Jeoung, Hoo-Gn;Kwon, In-Sun;Mohamed, Abd Al Wahab Saed;Hong, Sung-Tae
    • Parasites, Hosts and Diseases
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    • 제57권2호
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    • pp.135-144
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    • 2019
  • There have been some reports on schistosomiasis of school children in Sudan's Nile River basin area; however, information about the infection status of Schistosoma species and intestinal helminths among village residents of this area is very limited. Urine and stool samples were collected from the 1,138 residents of the Al Hidaib and Khour Ajwal villages of White Nile State, Sudan in 2014. The prevalence of overall schistosomiasis and intestinal helminthiasis was 36.3% and 7.7%, respectively. Egg positive rates were 35.6% for Schistosoma haematobium, 2.6% for S. mansoni, and 1.4% were mixed. The prevalence of schistosomiasis was significantly higher in men (45.6%) than in women (32.0%), in Khou Ajwal villagers (39.4%) than in Al Hidaib villagers (19.2%), and for age groups ${\leq}15$ years old (51.5%) than for age groups >15 years old (13.2%). The average number of eggs per 10 ml urine (EP10) of S. haematobium infections was 18.9, with 22.2 eggs in men vs 17.0 in women and 20.4 in Khou Ajwal villagers vs 8.1 in Al Hidaib villagers. In addition to S. mansoni eggs, 4 different species of intestinal helminths were found in the stool, including Hymenolepis nana (6.6%) and H. diminuta (1.0%). Collectively, urinary schistosomiasis is still prevalent among village residents in Sudan's White Nile River basin and was especially high in men, children ${\leq}15$ years, and in the village without a clean water system. H. nana was the most frequently detected intestinal helminths in the 2 villages.