Subgroup analyses generally suggested an increasing trend after 2000 and higher estimates in the major deer‐farming areas of northern China; host factors such as deer species, age, and sex, as well as environmental factors such as season, may also be associated with differences in prevalence.
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Epidemiology of Brucellosis Among Deer in China From 1978 to 2025: A Systematic Review and Meta-Analysis.
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The sentences
When stratified by longitude, the pooled seroprevalence rose from 13.7% (95% CI: 4.5–26.7) at 120–130°E to 15.5% (95% CI: 4.4–30.9) at 90–120°E and 26.3% (95% CI: 9.9–47.0) at 80–90°E—an apparent westward increase that did not reach statistical significance.