title: The internal transcribed spacer 1 (ITS-1), a controversial marker for the genetic diversity of Trypanosoma evansi.
abstract: Seven Trypanosoma evansi isolates from China and a Trypanosoma congolense sp. gifted from Kenya were characterized genetically by the internal transcribed spacer 1 (ITS-1) of nuclear ribosomal DNA (rDNA). The ITS-1 rDNA with the length of 338-342 bp was amplified by polymerase chain reaction (PCR) and sequenced from individual isolates of T. evansi. Although sequence variation between T. evansi isolates from China only was 0.3-3.8%, the constructed phylogenetic tree based on the ITS-1 rDNA sequence by the method of neighbor-joining and maximum parsimony revealed the genetic diversity among T. evansi isolates from China. For T. congolense sp., the most phylogenetically related species was T. congolense IL1180. Although the sequence variation ranged 0.8-14.5% between T. congolense isolates, the phylogenetic tree can not reflected the genetic diversity among T. congolense isolates perhaps because of the fewer number of isolates and sequences. The data could be applicable for the survey of parasite dynamics, epidemiological studies as well as prevention and control of the disease.
authors.affiliation: State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, 1 Xujianping, Yanchangbu, Lanzhou, Gansu Province 730046, People's Republic of China.
authors.forename: Zhancheng
authors.initials: Z
authors.lastname: Tian
authors.forename: Guangyuan
authors.initials: G
authors.lastname: Liu
authors.forename: Junren
authors.initials: J
authors.lastname: Xie
authors.forename: Hui
authors.initials: H
authors.lastname: Shen
authors.forename: Liyan
authors.initials: L
authors.lastname: Zhang
authors.forename: Ping
authors.initials: P
authors.lastname: Zhang
authors.forename: Jin
authors.initials: J
authors.lastname: Luo
mesh_terms: D000818:Animals; D002020:Buffaloes; D002162:Camelus; D002681:China; D021901:DNA, Intergenic / Q000235:genetics* / Q000302:isolation & purification; D016054:DNA, Protozoan / Q000235:genetics / Q000302:isolation & purification; D018397:Equidae; D005819:Genetic Markers; D014644:Genetic Variation; D051379:Mice; D010802:Phylogeny; D016415:Sequence Alignment; D014345:Trypanosoma / Q000145:classification / Q000235:genetics*
chemical_list: D021901:DNA, Intergenic; D016054:DNA, Protozoan; D005819:Genetic Markers