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The global prevalence of Cryptosporidium in sheep: a systematic review and meta-analysis

Published online by Cambridge University Press:  24 August 2022

Yuancai Chen ,
Huikai Qin ,
Jianying Huang ,
Junqiang Li  and
Longxian Zhang Open the ORCID record for Longxian Zhang [Opens in a new window]
Yuancai Chen
Affiliation:
College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, P. R. China
Huikai Qin
Affiliation:
College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, P. R. China
Jianying Huang
Affiliation:
College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, P. R. China
Junqiang Li
Affiliation:
College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, P. R. China
Longxian Zhang*
Affiliation:
College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, P. R. China
*
Author for correspondence: Longxian Zhang, E-mail: [email protected]
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Abstract

Cryptosporidium spp. are important pathogens with some species causing diarrhoea in humans and animals. Sheep are one of the most common potential hosts for various Cryptosporidium spp. The prevalence of Cryptosporidium in sheep globally was evaluated from published information including molecular data via meta-analysis. In total, 126 datasets from 41 countries were included for final quantitative analysis. Sheep aged <3 months had a significantly higher prevalence (27.8%; 3284/11 938) than those at the age of 3–12 and >12 months. The prevalence of Cryptosporidium in sheep with diarrhoea of 35.4% (844/1915) was higher than in sheep that did not show diarrhoea (11.3%; 176/1691). Fourteen Cryptosporidium species/genotypes were detected in sheep globally. The proportion of subgenotype family XIIa of Cryptosporidium ubiquitum was 90.0% (216/240); the proportions of subgenotypes IIdA20G1 and IIaA15G2R1 of Cryptosporidium parvum were 15.4% (62/402) and 19.7% (79/402). The results indicate that C. parvum is the dominant species in Europe while Cryptosporidium xiaoi is the dominant species in Oceania, Asia and Africa and C. ubiquitum is the dominant species in North America and South America. Subgenotype family IIa of C. parvum is particularly widespread among sheep worldwide. The results highlight the role of sheep as a reservoir host for zoonotic cryptosporidia and the need for further study of prevalence, transmission and control of this pathogen in sheep.

Keywords

Cryptosporidiummeta-analysisprevalencesheep
Type
Research Article
Information
Parasitology , Volume 149 , Issue 12 , October 2022 , pp. 1652 - 1665
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Copyright © The Author(s), 2022. Published by Cambridge University Press

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