Abstract
Cryptosporidium and Giardia are important intestinal zoonotic pathogens that can infect various hosts and cause diarrhoeal diseases. There are few reports of the epidemiological prevalence and molecular characterization of Cryptosporidium and Giardia in wild birds around Qinghai Lake and in the surrounding areas on the Qinghai-Tibetan Plateau, Northwest China. Therefore, the aim of this study was to determine the Cryptosporidium spp. and Giardia duodenalis genotypes and their epidemiological prevalence in wild birds by PCR amplification. To our knowledge, this is the first report of a variety of Cryptosporidium spp. and G. duodenalis infections in wild birds from that area, with overall prevalence rates of 8.98% (61/679) and 3.39% (23/679), respectively. Furthermore, PCR sequencing confirmed the presence of Cryptosporidium baileyi (n = 3), Cryptosporidium parvum (n = 58), and G. duodenalis assemblage B (n = 19) and E (n = 4) in wild birds from the areas around Qinghai Lake. The results of the present study demonstrated the wide distribution of Cryptosporidium and Giardia among wild birds, which has potential public health significance. Moreover, the study findings also provided useful molecular epidemiological data for monitoring and investigating the two parasitic protozoa in wild animals and surrounding environments.
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Acknowledgements
We are grateful to the staff Yubang He, Yonglin Wu, and Yuansheng Hou working in Qinghai Lake National Nature Reserve Administration for their assistance with collecting the samples.
Funding
The research was supported by the National Natural Science Foundation of China (no. 32060804), the Young and Middle-Aged Research Funding Project from Qinghai University (2017-QNY-1) and the One Thousand Talents Plan (P. Karanis) of the Chinese Government (no. WQ2013630172).
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Jian, Y., Zhang, X., Li, X. et al. Occurrence of Cryptosporidium and Giardia in wild birds from Qinghai Lake on the Qinghai-Tibetan Plateau, China. Parasitol Res 120, 615–628 (2021). https://doi.org/10.1007/s00436-020-06993-w
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DOI: https://doi.org/10.1007/s00436-020-06993-w