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Review
. 2025 Apr 9;12(4):345.
doi: 10.3390/vetsci12040345.

2002-2022 Quinolone Resistance in Escherichia coli of Swine in Mainland China: A Meta-Analysis

Xuelin Long  1 , Shujun Liu  1 , Runmin Kang  2 , Yue Sun  1 , Mingyue Tian  1 , Lijun Zhao  1 , Changwei Lei  1 , Hongning Wang  1 , Xin Yang  1
Affiliations
Review

2002-2022 Quinolone Resistance in Escherichia coli of Swine in Mainland China: A Meta-Analysis

Xuelin Long et al. Vet Sci. .

Abstract

Swine have emerged as significant reservoirs of antibiotic-resistant strains and genes. To establish a sound rationale for applying quinolone antibiotics in the swine industry, a meta-analysis was performed on the resistance rate of swine-derived Escherichia coli to quinolone antibiotics in China from 2002 to 2022. We systematically searched through three databases, PubMed, Web of Science, and CNKI, and included 53 eligible studies within the specified timeframe. Resistance rates were calculated using a random-effects model and the Freeman-Tukey double-arcsine transformation. The resistance rates observed were as follows: 37% for levofloxacin (95% CI: 27~47%), 43% for ofloxacin (95% CI: 34~51%), 54% for enrofloxacin (95% CI: 46~62%), and 50% for ciprofloxacin (95% CI: 42~58%). Further subgroup analyses illuminated that the resistance rates were higher in mainland China's eastern regions than in western regions. Additionally, there was no significant decrease in the resistance rate over time in different periods. From 2002 to 2022, Escherichia coli strains from swine in various regions of mainland China exhibited differing degrees of generalized resistance to quinolones. This poses a potential public health risk and underscores the fact that the control of quinolone antibiotics remains a prolonged and ongoing challenge.

Keywords: Escherichia coli; antibiotic resistance; meta-analysis; quinolone.

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Conflict of interest statement

The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
PRISMA flow diagram.
Figure 2
Figure 2
Meta-analysis of the resistance rate of E. coli to quinolone antibiotics. (a) Levofloxacin; (b) ofloxacin; (c) ciprofloxacin; (d) enrofloxacin.
Figure 3
Figure 3
Funnel diagram of quinolone antibiotics. (a) Levofloxacin; (b) ofloxacin; (c) ciprofloxacin; (d) enrofloxacin. Funnel plot for assessing potential publication bias. The x-axis represents the standardized mean difference, and the y-axis represents the standard error of the effect size. The solid line indicates the combined effect size, while the dotted line represents the 95% confidence interval of the expected symmetric distribution. The scattered points represent each included study. The symmetric distribution suggests no significant publication bias.
See this image and copyright information in PMC

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