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Molecular Investigation of Important Protozoal Infections in Yaks
Yanfang Lan1,$,*, Kun Li2,3,$,*, Khalid Mehmood4 and Qudratullah5

1Wuhan Business University, Wuhan 430056, People’s Republic of China; 2Institute of Traditional Chinese Veterinary Medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China; 3MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China; 4Department of Clinical Medicine and Surgery, Faculty of Veterinary & Animal Sciences, The Islamia University of Bahawalpur 63100, Bahawalpur, Pakistan; 5Department of Surgery and Pet Center, Cholistan University of Veterinary and Animal Sciences, Bahawalpur, 63100, Pakistan
§Those authors contributed equally to this study.
*Corresponding author: (YFL); (KL)


Theileria, Babesia and Cryptosporidium are important parasitic pathogens in cattle. Herein, we carried out this survey to reveal the prevalence and genetic characteristics of four important protozoa in yaks in western China. A total of 1091 serum samples were totally acquired from yaks on the high remote plateau and were assayed for antibodies against Theileria and Babesia by pilot commercial ELISA kits. Eighty-five blood samples and 57 feces were obtained and PCR analyses were performed. The results revealed that the overall prevalence of Theileria, Babesia and mixed Theileria-Babesia infections in yaks was 15.12, 21.54 and 6.51%, respectively. Four out of 85 blood samples were observed to be PCR-positive for Babesia bigemina (B. bigemina) with 99.77% similarity to the MK587709.1 isolate. Among the 57 fecal samples, five samples tested positive for C. parvum (IId genotype), while one sample tested positive for C. hominis. Our study provides a solid theoretical basis for the need to prevent infections of animals by those protozoa in order to improve yaks’ productivity on the Qinghai Tibetan plateau.

To Cite This Article: Lan Y, Li K, Mehmood K and Qudratullah, 2021. Molecular investigation of important protozoal infections in yaks. Pak Vet J, 41(4): 557-561.


ISSN 0253-8318 (Print)
ISSN 2074-7764 (Online)