Abstract
Enterocytozoon bieneusi is an opportunistic pathogen in immunodeficient patients. Although this pathogen has been reported in many domestic animals, few data are available about the occurrence of E. bieneusi in wild rats. In the current study, a total of 228 fecal samples from two wild rat species (Leopoldamys edwardsi and Berylmys bowersi) in China were examined by a nested PCR-based sequencing approach employing the internal transcribed spacer (ITS) region of nuclear ribosomal DNA. The overall prevalence of E. bieneusi in wild rats was 33.3% (76/228), with 35.1% (39/111) in L. edwardsi and 31.6% (37/117) in B. bowersi. Ten E. bieneusi genotypes (including four known and six novel genotypes) were identified, with the novel CQR-2 (n = 15) as the predominant genotype. Phylogenetic analysis indicated that ten genotypes in the present study belong to zoonotic group 1, which contains many genotypes in humans. Furthermore, multilocus sequence typing (MLST) analysis showed that 19 ITS-positive samples were successfully amplified at three microsatellites and one minisatellite, forming 18 multilocus genotypes (MLGs). This is the first report of E. bieneusi infection in the wild rats L. edwardsi and B. bowersi. Our findings suggest that wild rats could be a significant source of human infection, including contaminated food and water.
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Data availability statement
All the obtained ITS sequences were deposited in GenBank with the following accession numbers MH714710–MH714719. The MS1, MS3, MS4, and MS7 nucleotide sequences obtained in this study were deposited under accession numbers: MH711832–MH711846, MH711847–MH711854, MH711855–MH711866, and MH711867–MH711879.
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This project was supported by the Training Program for Excellent Young Innovators of Changsha (Grant No. KQ1802035)
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Gui, BZ., Zou, Y., Chen, YW. et al. Novel genotypes and multilocus genotypes of Enterocytozoon bieneusi in two wild rat species in China: potential for zoonotic transmission. Parasitol Res 119, 283–290 (2020). https://doi.org/10.1007/s00436-019-06491-8
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DOI: https://doi.org/10.1007/s00436-019-06491-8