Ehrlichia canis: Molecular characterization and genetic diversity based on the p28 and trp36 genes
Issued Date
2023-02-01
Resource Type
ISSN
00345288
eISSN
15322661
Scopus ID
2-s2.0-85146465584
Pubmed ID
36657265
Journal Title
Research in Veterinary Science
Volume
155
Start Page
88
End Page
102
Rights Holder(s)
SCOPUS
Bibliographic Citation
Research in Veterinary Science Vol.155 (2023) , 88-102
Suggested Citation
Poolsawat N., Nooroong P., Junsiri W., Watthanadirek-Wijidwong A., Srionrod N., Sangchuai S., Minsakorn S., Tazawa K., Anuracpreeda P. Ehrlichia canis: Molecular characterization and genetic diversity based on the p28 and trp36 genes. Research in Veterinary Science Vol.155 (2023) , 88-102. 102. doi:10.1016/j.rvsc.2022.11.013 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/82305
Title
Ehrlichia canis: Molecular characterization and genetic diversity based on the p28 and trp36 genes
Author's Affiliation
Other Contributor(s)
Abstract
Ehrlichia canis is a common tick-borne intracellular pathogen causing canine monocytic ehrlichiosis (CME) in dogs worldwide. The aims of this study were to investigate the genetic diversity and antigenicity of E. canis based on the p28 and trp36 genes in dogs in Thailand. The E. canis p28 and trp36 genes were amplified by the polymerase chain reaction (PCR) and cloned for sequencing and bioinformatic analyses. 36% (44/120) of dog blood samples were positive for E. canis DNA consisting of p28 (31%, 14/44) and trp36 (69%, 30/44) genes with 792 and 882 bp of PCR products size, respectively. The E. canis TRP36 from all Thailand sequences exhibited encoded nine amino acids (TEDSVSAPA) with 11 copies of tandem repeats along the sequences. The phylogenetic trees of E. canis, using the p28 and trp36 genes, exhibited that the Thailand isolates fell into two clades and one clade with similarity ranging from 55.95 to 100% and 100%, respectively. The results of diversity analysis revealed 10 and 20 haplotypes of the p28 and trp 36 genes, respectively. The entropy analysis of the p28 and trp36 nucleic acid sequences showed 442 and 1321 high entropy peaks respectively, whereas those of the P28 and TRP36 amino acid sequences showed 477 and 388 high entropy peaks, respectively. For B-cell epitopes analysis, the conserved amino acid of P28 and TRP36 sequences has been also demonstrated. Therefore, the results could be utilized to improve the understanding of phylogenetic relationship, genetic diversity and antigenicity of E. canis Thailand isolates.