Animal Husbandry and Feed Science ›› 2023, Vol. 44 ›› Issue (4): 122-128.doi: 10.12160/j.issn.1672-5190.2023.04.017

• Animal Disease Prevention and Control • Previous Articles    

Molecular Identification and Genetic Diversity of Echinococcus granulosus Derived from Sheep in Abattoirs in Parts of Xinjiang Uygur Autonomous Region,China

XUE Wen1,2,WANG Lingyun1,WANG Yunfeng1,ZHANG Zhenjie1,ZHAO Aiyun1,WANG Tian1,QI Meng1   

  1. 1. College of Animal Science and Technology,Tarim University/Engineering Laboratory of Tarim Animal Disease Diagnosis and Control,Xinjiang Production and Construction Corps, Alar 843300,China
    2. Animal Diseases Control and Prevention Center of Xinjiang Uygur Autonomous Region,Urumqi 830010,China
  • Received:2023-07-04 Online:2023-07-30 Published:2023-08-30

Abstract:

[Objective] The aim of this study was to understand the infection status and molecular genetic characteristics of Echinococcus granulosusE. granulosus) derived from sheep in some large-scale abattoirs in Xinjiang Uygur Autonomous Region, China. [Method] A total of 96 cyst samples identified as E. granulosus by macroscopic observation were collected from the liver tissues of sheep in abattoirs. Following genomic DNA extraction, PCR amplification and sequencing were performed based on the cox1 and nad1 gene loci of E. granulosus. Sequence alignment was carried out to identify the genotype. The genetic evolution tree was constructed to analyze the molecular genetic characteristics. [Result] At the cox1 gene locus, a total of 81 samples were positive in PCR amplification (84.37%, 81/96). Sequence analysis identified that all positive samples were G1 genotype of E. granulosusn=81), with 15 haplotypes (Hap_1-15) presented. At the nad1 gene locus, there were 67 PCR positive samples (69.79%, 67/96). Two genotypes, G1 genotype (n=66) and G3 genotype (n=1) of E. granulosus, were identified through sequence analysis,with 19 haplotypes (Hap_1-19) presented. According to the phylogenetic analysis, the G1 and G3 genotypes of E. granulosus obtained in this study were in the same evolutionary branches as their counterparts of E. granulosus derived from the multiple host sources reported in China and abroad. [Conclusion] The E. granulosus derived from sheep in some parts of Xinjiang showed genetic diversity. Our results provide fundamental data for the prevention and control of echinocococosis in sheep in this region.

Key words: Echinococcus granulosus, detection, genotype, haplotype, sheep

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