Abstract
To understand the status of ticks carrying Ehrlichia and Anaplasma in the southern marginal zone of Gurbantunggut Desert, we collected and classified ticks from livestock in 11 locations of three different habitats in the southern marginal zone of Gurbantunggut Desert. Ticks were screened by nested polymerase chain reaction (PCR) and their 5' hypervariable regions of 16S rRNA genes were amplified by semi-nested PCR. The PCR products were sequenced and compared to DNA sequences in GenBank to identify the Anaplasmataceae species carried by the ticks. The collected 708 ticks (classified 236 specimens) were identified as 8 species of 4 genera. Among these specimens, 25 (10.59%) were positive for Ehrlichia and Anaplasma. Ehrlichia chaffeensis, Ehrlichia canis, Anaplasma marginale and Anaplasma ovis were found in Hyalomma asiaticum,Rhipi cephalus sanguineus, Hyalomma detritum and Haemaphysalis longicornis, respectively by sequence comparison. This study confirmed at molecular level that E. chaffeensis, A. marginale, A. ovis and E. canis are present in ticks carrying Ehrlichia andAnaplasma in the southern marginal zone of Gurbantunggut Desert. Key words: Ehrlichia, Anaplasma, tick-borne, southern marginal zone of Gurbantunggut Desert.
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