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Genetic variability of wildlife-derived Sarcoptes scabiei determined by the ribosomal ITS-2 and mitochondrial 16S genes

Authors
  • Li, Chun-Yan1
  • Sun, Yin1
  • Xie, Yue1
  • Zhou, Xuan2
  • Gu, Xiao-Bin1
  • Lai, Wei-Ming1
  • Peng, Xue-Rong3
  • Yang, Guangyou1
  • 1 Sichuan Agricultural University, Department of Parasitology, College of Veterinary Medicine, 211 Huimin Road, Wenjiang, Chengdu, Sichuan Province, 611130, China , Chengdu (China)
  • 2 Sichuan Agricultural University, Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Chengdu, 611130, China , Chengdu (China)
  • 3 Sichuan Agricultural University, Department of Chemistry, College of Life and Basic Science, Wenjiang, China , Wenjiang (China)
Type
Published Article
Journal
Experimental and Applied Acarology
Publisher
Springer-Verlag
Publication Date
Sep 20, 2018
Volume
76
Issue
1
Pages
53–70
Identifiers
DOI: 10.1007/s10493-018-0290-7
Source
Springer Nature
Keywords
License
Yellow

Abstract

Infestation by the ectoparasitic mite Sarcoptes scabiei (Acari: Sarcoptidae) has important implications for global wildlife conservation and both animal and human health. Ribosomal and mitochondrial DNA sequences of parasites are useful to determine genetic diversity and to describe their likely dynamic evolution. In this study, we described the genetic diversity of S. scabiei individuals collected from wild animals in China by sequencing the ribosomal ITS-2 and mitochondrial 16S rRNA genes. A total of 13 Sarcoptes isolates of wildlife, coupled with one of rabbit origin, were subjected to genetic characteristics. After cloning and sequencing, 14 ITS-2 sequences and 12 16S rRNA sequences were obtained and analyzed. Further analysis of haplotype network and population genetic structure revealed that there were 79 haplotypes in ITS-2 (main haplotype H2) and 31 haplotypes in 16S rRNA (main haplotype C10). The phylogenetic trees showed some partial clustering by location and host, and the analysis of gene polymorphism may prompt that all isolates of S. scabiei have a similar origin. We speculate that the genetic evolution of S. scabiei may be related with that of the hosts, but more research is necessary to better understand the host-parasite co-evolutionary relationship in S. scabiei. These results provide new insights into understanding the population genetics and evolutionary biology of S. scabiei and therefore a better understanding of controlling its infestation pathways worldwide.

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