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A PCR Based Survey of Babesia ovata in Cattle from Various Asian, African and South American Countries OAK
SIVAKUMAR, Thillaiampalam; ASADA, Masahito; BATTSETSEG, Badgar; HUANG, Xiaohong; LAN, Dinh Thi Bich; INPANKAEW, Tawin; P. YBAÑEZ, Adrian; ALHASSAN, Andy; THEKISOE, Oriel M. M.; DE MACEDO, Alan Caine Costa; INOKUMA, Hisashi; IGARASHI, Ikuo; YOKOYAMA, Naoaki; 猪熊, 壽; 五十嵐, 郁男; 横山, 直明.
Babesia ovata is a tick-transmitted hemoprotozoan parasite that infects cattle. In our study, bovine blood samples (n=2,034) were collected from 10 different countries (Brazil, China, Ghana, Japan, Mongolia, the Philippines, South Africa, Sri Lanka, Thailand and Vietnam) and DNA extracted. The DNA samples were screened using an established and specific polymerase chain reaction (PCR) assay targeting the Apical membrane antigen 1 (AMA-1) gene. Parasite DNA was detected among samples collected from Japan, Mongolia and Thailand. Sequence analyses confirmed that the PCR assay detected only B. ovata AMA-1, and that amplicons from different geographical locations were conserved. Our findings highlight the importance of designing adequate strategies to control B....
Palavras-chave: AMA-1; Babesia ovata; Cattle; Mongolia; Thailand.
Ano: 2013 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4016
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The Genetic Diversity of Merozoite Surface Antigen 1 (MSA-1) among Babesia bovis Detected from Cattle Populations in Thailand, Brazil and Ghana OAK
NAGANO, Daisuke; SIVAKUMAR, Thillaiampalam; DE DE MACEDO, Alane Caine Costa; INPANKAEW, Tawin; ALHASSAN, Andy; IGARASHI, Ikuo; YOKOYAMA, Naoaki; 五十嵐, 郁男; 横山, 直明.
In the present study, we screened blood DNA samples obtained from cattle bred in Brazil (n=164) and Ghana (n=80) for Babesia bovis using a diagnostic PCR assay and found prevalences of 14.6% and 46.3%, respectively. Subsequently, the genetic diversity of B. bovis in Thailand, Brazil and Ghana was analyzed, based on the DNA sequence of merozoite surface antigen-1 (MSA-1). In Thailand, MSA-1 sequences were relatively conserved and found in a single clade of the phylogram, while Brazilian MSA-1 sequences showed high genetic diversity and were dispersed across three different clades. In contrast, the sequences from Ghanaian samples were detected in two different clades, one of which contained only a single Ghanaian sequence. The identities among the MSA-1...
Palavras-chave: Babesia bovis; Brazil; Ghana; MSA-1; Thailand.
Ano: 2013 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4014
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