Leptospirosis Vaccination for Dogs

Leptospirosis is a serious bacterial disease that affects dogs and can be transmitted to humans. The bacteria are spread through the urine of infected animals, particularly rats and other wildlife. Dogs can contract leptospirosis by drinking contaminated water, walking through puddles or wet grass where infected urine is present, or through contact with infected animals.

While historically less common in Melbourne, leptospirosis cases have been increasing in suburban areas as urban development brings dogs into closer contact with wildlife habitats. Dogs in Cranbourne, Clyde, Lynbrook, and surrounding growth corridors may be at particular risk due to expanding residential areas bordering bushland and waterways.

The bacteria enter a dog’s body through:

• Drinking from contaminated water sources (puddles, ponds, streams)
• Contact with contaminated soil or vegetation
• Exposure to urine from infected rats, mice, or other wildlife
• Wounds or breaks in the skin
• Mucous membranes (eyes, nose, mouth)

Dogs who spend time outdoors, particularly in areas with wildlife activity or standing water, face a higher exposure risk. This includes dogs visiting parks, walking near creeks, or living in properties backing onto bushland – common scenarios for pet owners in Seaford, Skye, Devon Meadows, and the wider Cranbourne region.

Early recognition of symptoms is critical, as leptospirosis can progress rapidly. Warning signs include:

• Fever and shivering
• Muscle tenderness or reluctance to move
• Lethargy and weakness
• Loss of appetite
• Vomiting and diarrhoea
• Increased thirst and urination
• Jaundice (yellowing of gums and eyes)
• Difficulty breathing

Without treatment, leptospirosis can cause severe kidney and liver damage, potentially leading to organ failure. The disease can be fatal, making prevention through vaccination particularly important.

A vaccine is available to protect dogs against the most common strains of leptospirosis. The vaccination protocol involves:

Initial Vaccination:
Two doses given 2-4 weeks apart for dogs receiving the vaccine for the first time
Can be given to puppies from 12 weeks of age

Booster Vaccinations:
Annual boosters required to maintain protection
Can be given alongside routine annual vaccinations

The leptospirosis vaccination is not part of the standard core vaccination protocol (C3 or C5), so you’ll need to specifically request it if you want your dog protected. We recommend discussing your dog’s lifestyle and exposure risk during routine health checks to determine if leptospirosis vaccination is appropriate.

We recommend leptospirosis vaccination for dogs who:

• Spend time in areas with wildlife activity
• Walk near creeks, rivers, or areas with standing water
• Visit dog parks or recreational areas regularly
• Live in or visit rural or semi-rural properties
• Have potential contact with rodents or wildlife

Dogs living in growing suburban areas, such as Cranbourne West, Botanic Ridge, and surrounding suburbs where residential development borders natural habitats, may benefit from protection. We can assess your dog’s individual risk factors and help you make an informed decision about vaccination.

Leptospirosis is a zoonotic disease, meaning it can be transmitted from animals to humans. People can contract the disease through contact with infected urine or contaminated water. While uncommon, this transmission risk makes vaccination particularly important for households with children, elderly family members, or immunocompromised individuals.

If your dog is diagnosed with leptospirosis, strict hygiene precautions are essential when handling your pet or cleaning contaminated areas. We’ll provide detailed guidance on protecting your family while your dog receives treatment.