Canine Leptospirosis Outbreak in Japan

Area of Science:

• Veterinary Medicine
• Infectious Diseases
• Epidemiology

Background:

• Canine leptospirosis is a significant infectious and zoonotic disease.
• Outbreaks pose a threat to canine health and public safety.

Purpose of the Study:

• To investigate a suspected outbreak of canine leptospirosis in Osaka Prefecture, Japan.
• To identify risk factors and the causative agent of the outbreak.

Main Methods:

• Case-control study comparing affected dogs with a control group.
• Logistic regression analysis to determine risk factors.
• Microscopic agglutination tests (MAT) to identify Leptospira serovars.

Main Results:

• Nine out of 11 suspected cases resulted in canine death within a month.
• Walking dogs along a specific riverbed was identified as a significant risk factor (Odds Ratio = 13.3, p=0.044).
• Leptospira interrogans serovar Australis was identified as the likely causative agent based on high antibody titers.

Conclusions:

• Riverbed walks represent a critical risk factor for canine leptospirosis outbreaks.
• Leptospira interrogans serovar Australis can cause localized canine leptospirosis outbreaks in Japan.
• Development of a canine vaccine against prevalent serovars is crucial to prevent future outbreaks and reduce infection rates.