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Meta-Analysis
. 2021 Oct;148(12):1417-1433.
doi: 10.1017/S0031182021001116. Epub 2021 Jun 30.

The global seroprevalence of Toxoplasma gondii infection in bovines: a systematic review and meta-analysis

Seyyed Ali Shariatzadeh  1   2   3 , Shahabeddin Sarvi  1   2 , Seyed Abdollah Hosseini  1   2 , Mehdi Sharif  4 , Shirzad Gholami  1   2 , Abdol Sattar Pagheh  5 , Fattaneh Montazeri  6 , Tooran Nayeri  1   2   3 , Maryam Nakhaei  1   2   3 , Tahereh Mikaeili Galeh  1   2   3 , Ahmad Daryani  1   2
Affiliations
Meta-Analysis

The global seroprevalence of Toxoplasma gondii infection in bovines: a systematic review and meta-analysis

Seyyed Ali Shariatzadeh et al. Parasitology. 2021 Oct.

Abstract

Bovines, especially cattle, are considered as one of the main sources of Toxoplasma gondii infection for humans. A more comprehensive understanding of the occurrence of T. gondii is needed to provide a global perspective on the prevalence of T. gondii in bovines. Here, we present the results of the first systematic review and meta-analysis on the global T. gondii seroprevalence in bovines. Six databases (PubMed, ScienceDirect, Web of Science, Scopus, ProQuest and Google Scholar) were comprehensively searched for relevant studies published between 1 January 1967 and 30 May 2019. Among 7691 publications searched, 178 studies (from 50 countries) with 193 datasets were included in the meta-analysis. The global pooled and weighted seroprevalence of T. gondii among bovines was 17.91% [95% confidence interval (CI): 15.32–20.6]. Weighted prevalence based on the host was as follows: cattle 16.94% (95% CI: 14.25–19.81), buffalo 22.26% (95% CI: 16.8–29), yak 23% (95% CI: 14–33) and bison 8.1% (95% CI: 3.9–13.7). Continued monitoring on the status of T. gondii seroprevalence in bovines is essential. Study on the prevalence of T. gondii in the products of bovines such as milk, meat, etc., which are considered as the source of transmission of infection to humans, is recommended.

Keywords: Bovine; meta-analysis; seroprevalence; toxoplasmosis; zoonosis.

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Figures

None
Graphical abstract
Fig. 1.
Fig. 1.
Graphical summary of this study on global seroprevalence of bovine Toxoplasma infection.
Fig. 2.
Fig. 2.
Flow chart of the study selection process showing inclusion and exclusion of studies identified.
Fig. 3.
Fig. 3.
Bias assessment plot from the Egger's test based on standard error.
Fig. 4.
Fig. 4.
Forest plot displaying the global seroprevalence of Toxoplasma gondii in bovines.
Fig. 5.
Fig. 5.
Global distribution map of seroprevalence of T. gondii in bovines worldwide.
See this image and copyright information in PMC

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