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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2004-1-9
pubmed:databankReference
pubmed:abstractText
The phylogenetic relationships between six isolates of Theileria spp. infective to small ruminants, and two isolates of Theileria spp. infective to yak, all transmitted by Haemaphysalis qinghaiensis, together with the Theileria orientalis/sergenti/buffeli group and T. sinensis, were analyzed using the 18S ssrRNA gene sequence. The target DNA segment was amplified by polymerase chain reaction (PCR). The PCR product was used either for direct sequencing or was ligated to the PCR II vector for sequencing. The length of the 18S ssrRNA gene of all Theileria spp. involved in this study was around 1,740 bp. Two phylogenetic trees were inferred based on the 18S ssrRNA gene sequence of the Chinese isolates only, and Chinese isolates and other species of Theileria available in GenBank. In the first tree, the Theileria sp. infective to yaks was found to be T. sinensis. The Theileria sp. infective to small ruminants was found to be composed of two separate species of Theileria. Theileria sp. from Qinghai, Madang, Ningxian and Lintan, which was identical to the unidentified Theileria sp. described previously, is designated Theileria sp (China 1). The Theileria sp. from Longde, Zhangjiachuan and Lintan, which has not been described previously, is designated Theileria sp. (China 2) in order to avoid confusion. In the second tree, Theileria sp. (China 1) was closely related to benign Theileria, such as T. buffeli and T. sergenti, while Theileria sp. (China 2) was separated from other Theileria spp. The results indicate that H. qinghaiensis transmit at least three species of Theileria, two which are infective to sheep and goats, but not yak and one which is infective to yaks and cattle, but not to sheep and goats.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0932-0113
pubmed:author
pubmed:issnType
Print
pubmed:volume
92
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
36-42
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Phylogenetic analysis of Theileria species transmitted by Haemaphysalis qinghaiensis.
pubmed:affiliation
Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Xujiaping 11, Lanzhou, 730046 Gansu, The People's Republic of China. yinhong@public.lz.gs.cn
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't