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  • Title: Sequence analysis of the thrombospondin-related adhesive protein gene and heat shock protein 70 gene of Babesia gibsoni isolated from dogs in Nanjing, China.
    Author: Lin HR, Mei XT, Hong YF, Zhao YB, Guo XN, Yang DJ, Yao DW.
    Journal: Infect Genet Evol; 2017 Dec; 56():111-116. PubMed ID: 29154928.
    Abstract:
    In this study, the thrombospondin-related adhesive protein (TRAP) gene and the heat shock protein 70 (Hsp70) gene of Babesia gibsoni isolated from the naturally infected dog in the Nanjing area were cloned and sequenced. Twenty blood samples were collected from the suspected cases of babesiosis at the animal hospital of Nanjing Agriculture University. Genomic DNA was extracted from the blood samples, and the 18S rDNAs were amplified by PCR to confirm Babesia infection. As a result, 10 cases of Babesia 18S rDNA gene amplification were positive in the 20 blood samples, confirming that the 10 cases were infected with canine Babesia. The TRAP and the Hsp70 gene fragments were amplified from all 10 positive cases. The four isolates, named NJN1, NJN2, NJN3 and NJN4, were sequenced and compared with other isolates in Asian. The similarity of TRAP and Hsp70 gene sequences among four isolates in Nanjing were above 99%. The Nanjing isolates were closely related to isolates from Taiwan and Japan. Indian isolates were different form Chinese and Japanese isolates, despite the very high similarity of the 18s rRNA genes sequence. These results suggest that the TRAP and Hsp70 genes have a reference value for the genetic diversity analysis of Babesia gibsoni.
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