Canine leptospirosis vaccination has evolved to address a broader serovar range, with geographic expansion of disease requiring updated prevention approaches.
Leptospirosis causes severe, acute suffering - acute renal failure, hepatic disease, hemorrhage, and in some cases pulmonary bleeding syndrome cause intense illness with high fatality rates. The disease is preventable through appropriate vaccination, and the broader protection offered by 4-serovar vaccines over older 2-serovar products represents a meaningful welfare advance. Annual vaccination in at-risk dogs prevents an entirely avoidable, highly distressing disease. The zoonotic risk adds a public health dimension to the welfare imperative for vaccination compliance.