<p><i>Enterocytozoon bieneusi</i> is an important zoonotic pathogen. This study examined its prevalence and genotypes in Siberian tigers in Northeast China. Fecal samples from 97 captive and 5 wild tigers were analyzed by nested PCR targeting the ITS region. Prevalence in captive tigers was 40.2% (39/97), with no significant site differences. Three genotypes were identified: D (89.7%), Peru8 (7.7%), and Type IV (2.6%), all within zoonotic Group 1. <i>E. bieneusi</i> was detected for the first time in a wild Siberian tiger (genotype D). The predominance of genotype D—common in poultry—suggests dietary transmission through contaminated chicken meat. These results indicate high prevalence of zoonotic genotypes in tigers, underscoring cross-species transmission risks and the need for strengthened biosecurity and surveillance.</p>

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Molecular detection and zoonotic genotyping of Enterocytozoon bieneusi in Siberian tigers (Panthera tigris altaica), Northeast China

  • Hang Tian,
  • Zhiying Cui,
  • Zhiyou Lv,
  • Mengqiu Liu,
  • Yang Liu,
  • Yilin Zhao,
  • Weiyan Yin,
  • Mengru Zhao,
  • Hongyan Yu,
  • Mengchao Zhou,
  • Yaxian Lu,
  • Dapeng Li,
  • Ming Gong,
  • Haitao Xu,
  • Zhijun Hou

摘要

Enterocytozoon bieneusi is an important zoonotic pathogen. This study examined its prevalence and genotypes in Siberian tigers in Northeast China. Fecal samples from 97 captive and 5 wild tigers were analyzed by nested PCR targeting the ITS region. Prevalence in captive tigers was 40.2% (39/97), with no significant site differences. Three genotypes were identified: D (89.7%), Peru8 (7.7%), and Type IV (2.6%), all within zoonotic Group 1. E. bieneusi was detected for the first time in a wild Siberian tiger (genotype D). The predominance of genotype D—common in poultry—suggests dietary transmission through contaminated chicken meat. These results indicate high prevalence of zoonotic genotypes in tigers, underscoring cross-species transmission risks and the need for strengthened biosecurity and surveillance.