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. 2022 Dec 15;12(24):3553.
doi: 10.3390/ani12243553.

The Prevalence of Trichinella spiralis in Domestic Pigs in China: A Systematic Review and Meta-Analysis

Huifang Bai  1 , Bin Tang  1 , Weidong Qiao  1 , Xiaoxia Wu  1 , Mingyuan Liu  1 , Xuelin Wang  1
Affiliations

The Prevalence of Trichinella spiralis in Domestic Pigs in China: A Systematic Review and Meta-Analysis

Huifang Bai et al. Animals (Basel). .

Abstract

The meta-analysis was performed to assess the prevalence of T. spiralis in domestic pigs in China. The potential studies from seven databases (Pubmed, Web of science, Scopus, Google Scholar, CNKI, Wanfang, CBM) were searched. I2, Cochran's Q statistic and the funnel plot and Egger's test were used to assess heterogeneity and publication bias, respectively. In this study, a total of 179 articles were captured in the initially screened. Of these, we finally obtained 39 significant articles (including 43 studies involving in 551,097 pigs) for the final analysis. We calculated using a random-effects model, and we found the overall infection rate was 0.04 (95% CI 0.03-0.06). The highest prevalence region was Guangxi. The funnel plot and Egger's test showed no publication bias in our meta-analysis. In addition, this high heterogeneity index was suggestive of potential variations which could be due to regions, quality scores, detection methods, publication years, or samplings. These results indicated that T. spiralis were still prevalent in some areas in China. This highlights the need for an increased focus on implementing affordable, appropriate control programs to reduce economic losses and T. spiralis infection in domestic pigs in China.

Keywords: foodborne disease; parasitic disease; trichinellosis; zoonosis.

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Conflict of interest statement

The authors declare that they have no competing financial interests.

Figures

Figure 1
Figure 1
The flow diagram of search and selection of relevant articles for a systematic review on the prevalence of Trichinella spiralis in domestic pigs in China.
Figure 2
Figure 2
Forest plot showing the pooled prevalence of Trichinella spiralis in domestic pigs in China. The length of the horizontal line represents the 95% confidence interval and the diamond represents the summarized effect [34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72].
Figure 3
Figure 3
Distribution map of Trichinella spiralis in domestic pigs in China.
Figure 4
Figure 4
Egger’s test for publication bias in Trichinella spiralis infection in domestic pigs in China.
Figure 5
Figure 5
Funnel plot with trim and fill analysis of the publication bias in Trichinella spiralis infection in domestic pigs in China.
See this image and copyright information in PMC

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