China review links canine and human leptospirosis risk

A new systematic review and meta-analysis in Preventive Veterinary Medicine pulls together the available evidence on human and canine leptospirosis in China, analyzing 109 studies from 29 provinces and more than 120,000 total samples. The authors conclude that leptospirosis remains a One Health concern in China, despite a long-term decline in reported human incidence nationally, because people and dogs share environmental exposure risks and dogs can act as silent shedders of Leptospira in urine. The review was designed to map prevalence patterns and associated factors across both species, giving a broader picture than single-region studies can provide. (sciencedirect.com)

Why it matters: For veterinary professionals, the paper is a reminder that leptospirosis surveillance can't be treated as only a human public health issue or only a canine medicine issue. China’s reported human leptospirosis incidence fell from 0.047 per 100,000 people in 2010 to 0.009 in 2018, then edged back up to 0.019 in 2023, suggesting the disease burden is lower than in prior decades but not gone. That matters in practice because dogs may be clinically ill or subclinical, and environmental exposure, especially around contaminated water and soil, continues to shape risk. For clinics, that reinforces the value of exposure history, differential diagnosis in compatible renal or hepatic cases, and clear counseling for pet parents about zoonotic precautions. (idpjournal.biomedcentral.com)

What to watch: Watch for whether this review prompts more region-specific surveillance, updated canine risk assessments, or stronger One Health coordination around leptospirosis monitoring in China. (sciencedirect.com)