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Registros recuperados: 64
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Detection of Antibodies to Babesia equi by The Latex Agglutination Test with Recombinant Merozoite Antigen-2 OAK
Tanaka, Tetsuya; Xuan, Xuenan; Igarashi, Ikuo; Nagasawa, Hideyuki; Fujisaki, Kozo; Suzuki, Naoyoshi; Mikami, Takeshi; 玄, 学南; 五十嵐, 郁男.
Palavras-chave: Babesia equi; EMA-2; Baculovirus; Latex agglutination test.
Ano: 1999 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/329
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Detection of Collagen-cross Reactive Antigenic Components in Toxoplasma gondii OAK
Omata, Yoshitaka; Inoue, Noboru; Yonematsu, Kunio; Claveria, Florencia G.; Igarashi, Ikuo; Saito, Atsushi; Suzuki, Naoyoshi; 井上, 昇; 五十嵐, 郁男.
Palavras-chave: Collagen; Cross-reactive antigens; Toxoplasma gondii.
Ano: 1995 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/223
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Development and evaluation of an enzyme-linked immunosorbent assay using recombinant p23 for the detection of antibodies to Cryptosporidium parvum in cattle OAK
Bannai, Hiroshi; Nishikawa, Yoshifumi; Seo, Jin-yong; Nakamura, Chinatsu; Zhang, Sofa; Kimata, Isao; Takashima, Yasuhiro; Li, Junyou; Igarashi, Ikuo; Xuan, Xuenan; 西川, 義文; 五十嵐, 郁男; 玄, 学南.
An enzyme-linked immunosorbent assay (ELISA) based on the recombinant p23 of Cryptosporidium parvum was established for the detection of antibodies against C. parvum in cattle. The sensitivity and specificity of the ELISA were evaluated with the standard indirect fluorescent antibody test (IFAT) using sporozoites as antigens. Of 77 bovine sera collected from China, 20 (26.0%) were identified as positive by the IFAT. The same samples were tested with the ELISA. The optical densities at 415 nm were compared to the IFAT results and statistically analyzed to designate a provisional cut-off point. As a result, the cut-off point was concluded to be 0.08, which was considered to be the best condition in the light of its sensitivity (80%) and specificity (73.7%)....
Palavras-chave: Cryptosporidium parvum; P23; ELISA; IFAT.
Ano: 2006 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/142
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Diagnosis of Babesia caballi Infection in Horses by Polymerase Chain Reaction OAK
Xuan, Xuenan; Igarashi, Ikuo; Avarzed, A.; Ikadai, Hiromi; Inoue, Noboru; Nagasawa, Hideyuki; Fujisaki, Kozo; Toyoda, Yutaka; Suzuki, Naoyoshi; Mikami, Takeshi; 玄, 学南; 五十嵐, 郁男; 井上, 昇.
A set of primers were designed according to the published sequence of the gene encoding a rhoptry protein of Babesia caballi, and used to amplify parasite DNA from the blood samples obtained from carrier horses by polymerase chain reaction(PCR)method.The PCR method was sensitive enough to detect parasite DNA from 2.5 μl blood sample with a parasitemia of 0.000001%. The PCR method was compared with fluorescent antibody test(IFAT) in order to evaluate the diagnosis effciency for B. caball infection in horses. Of 142 field samples from Mongolia, 28(20%) and 96(69%)samples were identified positively by PCR and IFAT, respectively. Although the sensitivity of PCR was lower than IFAT, it was noted that the 5 IFAT-negative samples were PCR-positive, suggesting...
Palavras-chave: Babesia caballi; PCR; IFAT.
Ano: 1998 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/281
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Different Activation of Lymphocytes in Reaction to Babesia microti Infection in iNOS-/- and Wildtype Mice OAK
Remer, Katharina; Igarashi, Ikuo; Inoue, Noboru; Nagasawa, Hideyuki; Toyoda, Yutaka; Suzuki, Naoyoshi; 五十嵐, 郁男; 井上, 昇; 長澤, 秀行.
Palavras-chave: Lymphocytes; Babesia microti; Spleen; INOS-/- mice; CD4+ cells; CD8+ cells; IFN-γ; Antibody-titer.
Ano: 1997 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/263
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FUCOIDAN INHIBITS THE IN VITRO GROWTH OF BABESIA BOVIS OAK
Takabatake, Noriyuki; Hashiba, Shintaro; Bork, Sabine; Okamura, Masashi; Yokoyama, Naoaki; Igarashi, Ikuo; 横山, 直明; 五十嵐, 郁男.
Palavras-chave: Babesia bovis; Fucoidan.
Ano: 2004 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/646
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Genetic diversity and antigenicity variation of Babesia bovis merozoite surface antigen-1 (MSA-1) in Thailand OAK
Tattiyapong, Muncharee; Sivakumar, Thillaiampalam; Takemae, Hitoshi; Simking, Pacharathon; Jittapalapong, Sathaporn; Igarashi, Ikuo; Yokoyama, Naoaki.
Babesia bovis, an intraerythrocytic protozoan parasite, causes severe clinical disease in cattle worldwide. The genetic diversity of parasite antigens often results in different immune profiles in infected animals, hindering efforts to develop immune control methodologies against the B. bovis infection. In this study, we analyzed the genetic diversity of the merozoite surface antigen-1 (msa-1) gene using 162 B. bovis-positive blood DNA samples sourced from cattle populations reared in different geographical regions of Thailand. The identity scores shared among 93 msa-1 gene sequences isolated by PCR amplification were 43.5-100%, and the similarity values among the translated amino acid sequences were 42.8-100%. Of 23 total clades detected in our...
Palavras-chave: Antigenicity variation; Babesia bovis; Msa-1; Genetic diversity; Thailand.
Ano: 2016 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4490
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IMMUNOSCREENING OF BABESIA RODHAINI GENES ENCODING IMMUNOGENIC PROTEINS FROM THE CDNA EXPRESSION PHAGE LIBRARY OAK
Fujii, Kei; Takabatake, Noriyuki; Boonchit, Suthisak; Hirata, Haruyuki; Yokoyama, Naoaki; Igarashi, Ikuo; 横山, 直明; 五十嵐, 郁男.
Palavras-chave: Babesia rodhaini; Babesiosis; Immunoscreening; CDNA expression library.
Ano: 2002 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/626
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IN VITRO CULTURE OF THEILERIA ORIENTALIS SERGENTI, AND THE USE OF THE BOVINE-RED BLOOD CELL-SCID MOUSE MODEL IN-AID OF CULTIVATION OAK
Ogata, Takashi; Tsukamoto, Daisuke; Sato, Masumi; Kamio, Tsugihiko; Terada, Yutaka; Igarashi, Ikuo; Claveria, Florencia G.; Fujisaki, Kozo; 五十嵐, 郁男.
Palavras-chave: Adult bovine serum; Bo-RBC SCID mice; In vitro; Theileria orientalis sergenti.
Ano: 2002 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/628
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IN VITRO GROWTH INHIBITORY EFFECTS OF COMBINED APPLICATIONS OF CLOTRIMAZOLE, KETOCONAZOLE, AND CLODINAFOP-PROPARGYL ON EQUINE BABESIA PARASITES OAK
Bork, Sabine; Yokoyama, Naoaki; Okamura, Masashi; Igarashi, Ikuo; 横山, 直明; 五十嵐, 郁男.
Recently,we reported the in vitro growth inhibitory effects of the imidazole derivatives,clotrimazole(CLT) and ketoconazole (KC),and the herbicide,clodinafop-propargyl(CP),against bovine and equine Babesia parasites. Additionally,in the bovine species,several combined applications of the CLT,KC,and CP were reported to significantly increase the inhibitory effects. In this study,similar combination tests were carried out in order to confirm possible synergistic effects in the equine species,Babesia caballi and Babesia equi. Combinations of CLT/KC, CLT/CP,and CLT/KC/CP exerted a significantly enhanced growth inhibitory efficacy in B. caballi,in contrast to B. equi,where no synergistic effects were observed in any of the combinations. Our results suggest that...
Palavras-chave: In vitro; Babesia; Clotrimazole; Ketoconazole; Clodinafop-propargyl.
Ano: 2003 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/637
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In vitro inhibitory effect of fosmidomycin on the asexual growth of Babesia bovis and Babesia bigemina OAK
Sivakumar, T; Aboulaila, M. R. A.; Khukhuu, A; Iseki, H; Alhassan, A; Yokoyama, Naoaki; Igarashi, Ikuo; 横山, 直明; 五十嵐, 郁男.
The in vitro inhibitory effect of fosmidomycin was evaluated against the asexual growth of bovine Babesia parasites (Babesia bovis and Babesia bigemina). In the cultures with these parasites, severe reduction of parasite growth was observed by the addition of 1.25 μg/ml of the final drug concentration. Under these conditions, B. bigemina was completely cleared until the third day of cultivation. On the other hand, B. bovis was completely eliminated on the fourth day when the concentration was 6.25 μg/ml in the culture. These parasites failed to grow again when a drug-free medium was substituted for the subsequent cultivation. The IC50 values of fosmidomycin against B. bovis were determined as 0.88 and 0.63 μg/ml in the in vitro cultures with...
Palavras-chave: Fosmidomycin; Babesia bovis; Babesia bigemina; Asexual growth; In vitro culture.
Ano: 2008 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2235
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Inhibitory Effects of Pepstatin A and Mefloquine on the Growth of Babesia Parasites OAK
Munkhjargal, Tserendorj; AbouLaila, Mahmoud; Mohamad Alaa Terkawi; Sivakumar, Thillaiampalam; Ichikawa, Madoka; Davaasuren, Batdorj; Nyamjargal, Tserendorj; Yokoyama, Naoaki; Igarashi, Ikuo; 横山, 直明; 五十嵐, 郁男.
We evaluated the inhibitory effects of pepstatin A and mefloquine on the in vitro and in vivo growths of Babesia parasites. The in vitro growth of Babesia bovis, B. bigemina, B. caballi, and B. equi was significantly inhibited (P < 0.05) by micromolar concentrations of pepstatin A (50% inhibitory concentrations = 38.5, 36.5, 17.6, and 18.1 μM, respectively) and mefloquine (50% inhibitory concentrations = 59.7, 56.7, 20.7, and 4 μM, respectively). Furthermore, both reagents either alone at a concentration of 5 mg/kg or in combinations (2.5/2.5 and 5/5 mg/kg) for 10 days significantly inhibited the in vivo growth of B. microti in mice. Mefloquine treatment was highly effective and the combination treatments were less effective than other treatments....
Ano: 2012 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3829
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Molecular and Immunological Characterization of a Novel 32-kDa Secreted Protein of Babesia microti OAK
Ooka, Hideo; Terkawi, Mohamad A; Cao, Shinuo; Aboge, Gabriel; Goo, Youn-Kyoung; Luo, Yuzi; Li, Yan; Nishikawa, Yoshifumi; Igarashi, Ikuo; Xuan, Xuenan; 西川, 義文; 五十嵐, 郁男; 玄, 学南.
A cDNA encoding the Babesia microti 32-kDa protein was identified by serological immunoscreening of a cDNA expression library and designated as BmP32. The full length of BmP32 contains an open reading frame of 918 base pairs consisting of 306 amino acids having a significant homology with B. microti secreted antigen 1. Antiserum raised against recombinant protein (rBmP32) specifically reacted with a 32-kDa native protein of the parasite lysate using western blot analysis. The indirect immunofluorescent antibody test showed a preferable localization of BmP32 in the cytoplasm of the intra- and extracellular parasites. Moreover, BmP32 was secreted in the cytosol of infected erythrocytes, especially during the peak parasitemia and the recovery phase of the...
Ano: 2012 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3820
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Molecular identification and antigenic characterization of a merozoite surface antigen and a secreted antigen of Babesia canis (BcMSA1 and BcSA1) OAK
Zhou, Mo; Cao, Shinuo; Luo, Yuzi; Liu, Mingming; Wang, Guanbo; Moumouni, Paul Franck Adjou; Jirapattharasate, Charoonluk; Iguchi, Aiko; Vudriko, Patrick; Terkawi, Mohamad Alaa; Lowenstein, Mario; Kern, Angela; Nishikawa, Yoshifumi; Suzuki, Hiroshi; Igarashi, Ikuo; Xuan, Xuenan.
Background: Babesia canis is an apicomplexan tick-transmitted hemoprotozoan responsible for causing canine babesiosis in Europe and west Asia. Despite its importance, there is no known rapid diagnostic kit detection of B. canis infection in dogs. The present study identified two novel antigens of B. canis and used the recombinant antigens to establish a rapid, specific and sensitive serodiagnostic technique for detection of B. canis infection. Methods: A complementary DNA (cDNA) expression library was constructed from the mRNA of B. canis and immunoscreened using B. canis-infected dog sera. The cDNAs encoding a merozoite surface antigen and a secreted antigen protein were identified and designated as BcMSA1 and BcSA1, respectively. The recombinant BcMSA1...
Palavras-chave: Babesia canis; Canine babesiosis; BcMSA1; BcSA1; ELISA; Immunochromatographic tests.
Ano: 2016 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4420
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Molecular Prevalence of Different Genotypes of Theileria orientalis Detected from Cattle and Water Buffaloes In Thailand OAK
Altangerel, Khukhuu; Sivakumar, Thillaiampalam; Inpankaew, Tawin; Jittapalapong, Sathaporn; Terkawi, Mohamad Alaa; Ueno, Akio; Xuan, Xuenan; Igarashi, Ikuo; Yokoyama, Naoaki; 玄, 学南; 五十嵐, 郁男; 横山, 直明.
Here we report on an epidemiological study regarding the molecular prevalence of different genotypes of Theileria orientalis present among domestic cattle and water buffalo populations bred in Thailand. A phylogenetic analysis based on the parasitic gene encoding a major piroplasm surface protein revealed the presence of 5 genotypes (Types 1, 3, 5, 7, and N-3) in cattle and 7 genotypes (Types 1, 3, 4, 5, 7, N-2, and N-3) in water buffaloes. Types 4, 7, and N-3 of T. orientalis were reported for the first time in water buffaloes. The previously reported C and Thai types from Thailand clustered as types 7 and 6, respectively, in the present analysis. Great similarities were observed among nucleotide sequences of isolates of the same genotype from cattle and...
Ano: 2011 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3592
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NITRIC OXIDE IS INVOLVED IN EARLY HOST DEFENSE AGAINST A PRIMARY INFECTION WITH BABESIA MICROTI IN MICE OAK
Remer, Katharina; Igarashi, Ikuo; Toyoda, Yutaka; Suzuki, Naoyoshi.
Palavras-chave: Babesia microti; Nitric oxide; INOS-/- mice; Aminoguanidine; Parasitemia; Hematocrit; Interferon-γ.
Ano: 2003 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/633
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Non-invasive Method of Identification of SAG-1 Transgenic Mice by PCR Analysis of Oral Wash Cells OAK
Seng, Seyha; Maki, Yoshiyuki; Yokoyama, Minesuke; Suzuki, R.; Kato, Mihoko; Bray, R. L.; Lim, C.; Zayatiin, Batsukh; Kamada, Takenori; Inoue, Noboru; Xuan, Xuenan; Igarashi, Ikuo; Nagasawa, Hideyuki; Fujisaki, Kozo; Mikami, Takeshi; Suzuki, Naoyoshi; Toyoda, Yutaka; 井上, 昇; 玄, 学南.
Palavras-chave: SAG-1; Oral wash and two-step polymerase chain reaction.
Ano: 1999 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/311
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Preliminary evaluation of oligomannose-coated liposome vaccines against lethal protozoan infections in mice OAK
Kuboki, Noritaka; Tiwananthagorn, Weerawan; Takagi, Hideaki; Nakayama, Tomoko; Xuan, Xuenan; Inoue, Noboru; Igarashi, Ikuo; Tsujimura, Kunio; Ikehara, Yuzuru; Kojima, Naoya; Yokoyama, Naoaki.
The oligomannose-coated liposome (OML) vaccine is known to induce cellular immunity specific for the encapsulated antigen in immunized mice. In the present study, we preliminarily evaluated the effect of the OML vaccine encapsulating the soluble protozoan lysate of Toxoplasma gondii, Trypanosoma brucei gambiense, or Babesia rodhaini on the corresponding protozoan infections in mice. After the challenge of T. gondii, the OML vaccine group avoided the high mortality resulting from acute infection that was dominantly observed in other control groups. During the infectious course, the development of the T. gondii-specific antibody, which is an indicator of humoral immunity, was constantly controlled at a lower level in the surviving mice of the OML vaccine...
Palavras-chave: Oligomannose-coated liposome (OML); OML; Soluble protozoan antigen; Antibody responses.
Ano: 2007 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1050
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Preliminary Survey on Horse Serum Indirect Fluorescence Antibody Titers in Japan against Babesia equi and Babesia caballi (Onderstepoort strain) Antigen OAK
Suzuki, Naoyoshi; Igarashi, Ikuo; Abgaandorjiin, A.; Waal, D. T. De; Nagasawa, Hideyuki; Omata, Yoshitaka; Saito, Atsushi; Oyamada, Takashi.
Palavras-chave: Babesia caballi; Babesia equi; Sera diagnosis; IFAT; Survey.
Ano: 1996 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/243
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Prime-boost immunization with DNA followed by a recombinant vaccinia virus expressing P50 induced protective immunity against Babesia gibsoni infection in dogs. OAK
Fukumoto, Shinya; Tamaki, Yoh; Okamura, Masashi; Bannai, Hiroshi; Yokoyama, Natsuko; Suzuki, Tomoko; Igarashi, Ikuo; Suzuki, Hiroshi; Xuan, Xuenan.
A heterologous prime-boost immunization regime with priming DNA followed by recombinant vaccinia virus expressing relevant antigens has been shown to induce effective immune responses against several infectious pathogens. In this study, we constructed a recombinant plasmid and vaccinia virus, both of which expressed P50 of Babesia gibsoni, to investigate the immunogenicity and protective efficacy of a heterologous prime-boost immunization against canine babesiosis. The dogs immunized with the prime-boost regime developed a significantly high level of specific antibody against P50 when compared with the control groups, and the antibody level was strongly increased after a booster immunization with a recombinant vaccinia virus. The prime-boost immunization...
Ano: 2007 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/812
Registros recuperados: 64
Primeira ... 1234 ... Última
 

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