Leptospirosis is a bacterial disease that has four different strains.


Leptospirosis can cause serious illness by damaging the liver and kidneys, sadly in some cases resulting in death. It is spread by infected dogs, mice, rats and cows but can also be caught from infected water. Leptospirosis can spread in urine, and can enter the body through the mouth, nose or wounds.

Symptoms include:

  • Reduced appetite
  • Drinking more
  • Fever
  • Jaundice (yellow gums and eyes)
  • Vomiting
  • Bloody diarrhoea
  • Mouth Ulcers
  • Muscle Pain
  • Bleeding from the mouth and eyes
  • Breathing Difficulties

Contact your practice urgently if you suspect your dog has Leptospirosis, especially if they often hunt rodents, drink or swim in outdoor water. Leptospirosis is a very serious disease; your dog’s chance of recovery is much higher if they receive immediate veterinary treatment.

Fortunately, our vaccines protect against all four strains of Leptospirosis commonly found in the UK.

Leptospirosis can also infect humans causing serious illness and is commonly known as Weil’s disease. If you have concerns that you or someone you know may have leptospirosis, it is best to contact your doctor or the NHS for advice.

Booster vaccinations

Yearly booster vaccinations are important for maintaining your dog’s antibody protection against these nasty diseases. A booster includes a full health check with the vet where you will be able to discuss any concerns you may have about your dog’s health or behaviour.