One Health field approach applied to Leptospirosis: A systematic review and meta-analysis across humans, animals and the environment
2025
Antoniolli, A. | Guis, Hélène | Picardeau, Mathieu | Goarant, C. | Flamand, C.
Background: Leptospirosis is a neglected zoonosis transmitted through urine of infected hosts or contaminated environments. The transmission of bacteria between humans, animals, and the environment underscores the necessity of a One Health approach. Methods: We conducted a systematic review to identify significant findings and challenges in One Health research on leptospirosis, focusing on studies involving sampling in at least two of the three compartments: human, animal, and environment. We searched in PubMed, Web of Science, Medline, Scopus, and ScienceDirect from January 1, 1918 to December 31, 2022. We assessed risk of bias in studies using Joanna Briggs Institute (JBI) tools and performed a meta-analysis to identify links between One Health compartments. Results: Out of 1,082 leptospirosis studies with sampling, 102 multicompartmental studies conducted between 1972 and 2022 were included: 70 Human-Animal, 18 Animal-Environment, 4 Human-Environment, and 10 across all compartments. Various methodological weaknesses were identified, from study design to statistical analysis. Meta-regressions identified positive associations between human and animal seroprevalences, particularly with livestock and with wild non-rodent animals, and a link between the environmental positivity rate and domestic animal seroprevalence. Our analysis was constrained by the limited number of studies included and by the quality of protocols. Conclusions: This 50-year overview of One Health field approach to leptospirosis highlights the critical need for more robust, well-supported One Health research to clarify the transmission dynamics and identify risk factors of zoonoses.
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