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What are the symptoms of leptospirosis in dogs?

Author

James Craig

Published Jan 10, 2026

Symptoms of leptospirosis

  • fever and high temperature.
  • jaundice (yellow gums and eyes)
  • muscle pain and limping.
  • weakness and collapse.
  • lack of appetite.
  • increased thirst.
  • vomiting.
  • bloody diarrhoea.

Can a dog survive leptospirosis?

With correct and aggressive treatment, your dog with leptospirosis has an 80% survival rate, but their kidney or liver function may be permanently impaired. Thus, you must seek veterinary attention for your dog as soon as they start showing leptospirosis signs.

How quickly do leptospirosis symptoms appear in dogs?

Dogs usually get sick one to two weeks after exposure. Illness can last days or weeks and may include fever, chills, vomiting, muscle aches or diarrhea. Some dogs may seem to recover after the initial illness, but later develop more severe symptoms.

What are the early signs of leptospirosis in dogs?

Signs and Symptoms in Pets

  • Fever.
  • Vomiting.
  • Abdominal pain.
  • Diarrhea.
  • Refusal to eat.
  • Severe weakness and depression.
  • Stiffness.
  • Severe muscle pain.

What is the most common manifestation of leptospirosis in dogs?

Acute kidney injury has been the most common presentation for canine leptospirosis in recent years. Dogs affected by leptospirosis might show clinical signs that include lethargy, anorexia, vomiting, abdominal pain, and polyuria, oliguria, or anuria.

22 related questions found

Can a dog have leptospirosis for months?

The bacteria that cause Leptospirosis are spread through the urine of infected animals, which can get into water or soil and can survive there for weeks to months.

What antibiotic treats leptospirosis in dogs?

Antibiotics such as penicillin, ampicillin, and amoxicillin, are reasonably effective against the acute stages of leptospirosis if begun early. These antibiotics treat the early stages of infection, making the dog feel better, although most affected dogs require intensive care in the veterinary hospital.

Can dogs recover from leptospirosis without treatment?

Leptospirosis can cause major damage to these organs and even organ failure if left untreated. Puppies and young dogs with weak immune systems have the highest risk of severe complications. Early detection is important so your dog can recover quickly from the disease.

How do you know if your dog has a bacterial infection?

Dogs who are sick with a bacterial infection usually have digestive upset (diarrhea or vomiting), a fever and are lethargic or cranky since they do not feel well.

How do I know if my dog has an infection?

Signs of an infection include an increased amount of waxy or pus-like discharge with an unpleasant odour. Irritation leads to scratching at the ear or head shaking. The inner ear flap and opening to the ear canal often looks red or swollen.

What are the chances of a dog getting leptospirosis?

Predicted probability of a positive microscopic agglutination test (MAT) result for canine leptospirosis in the continental USA. Predicted probabilities range from 0.023 to 0.371, indicating that approximately 1/3 dogs tested is expected to be positive for leptospirosis.

What does leptospirosis rash look like?

Red, irregular blotches appear on the skin that are dark red in color, sometimes turning a purple hue. They can appear anywhere on the body but in leptospirosis are often seen on the lower legs and the palatte.

What organs does leptospirosis affect in dogs?

The disease is caused by spiral-shaped bacteria called leptospires that live in water or warm, wet soil. Initial signs of leptospirosis include fever, lethargy, and lack of appetite. Left untreated, it can develop into a more severe, life-threatening illness that affects the kidneys, liver, brain, lungs, and heart.

What is the first symptom of leptospirosis?

Illness usually begins abruptly with fever and other symptoms. Leptospirosis may occur in two phases: After the first phase (with fever, chills, headache, muscle aches, vomiting, or diarrhea) the patient may recover for a time but become ill again.

How do you test a dog for lepto?

What is the MAT test for leptospirosis? The MAT or microscopic agglutination test detects the presence of antibodies against Leptospira in a dog's blood. If the level of antibodies (called a titer) is high enough or can be shown to be rising over time, then infection is confirmed.

What animals spread leptospirosis?

The bacteria that cause leptospirosis are spread through the urine of infected animals, which can get into water or soil and can survive there for weeks to months.
...
These can include, but are not limited to:

  • Cattle.
  • Pigs.
  • Horses.
  • Dogs.
  • Rodents.
  • Wild animals.

Is there a dog virus going around 2020?

The canine flu is now rapidly spreading in Southern California. Bay Area experts tell us it is only a matter of time before this virus moves further north into the Bay Area. Roughly 800 confirmed and suspected cases are reported.

How can I treat my dogs bacterial infection at home?

Many excellent topical antibacterial products can be used with antibiotic and shampoo therapy. An excellent product, Be Soothed Tea Tree Oil Skin Relief contains natural tea tree oil, which is a powerful antibacterial and antifungal compound. It can be applied up to 2-3 times daily on affected areas of the skin.

What does an infection look like on a dog?

The signs of bacterial infections typically depend on the location of the infection. Visible infections are often subcutaneous (under the skin) but may also involve the surface of the skin. These can look like wounds or areas of swelling. They may appear as firm or soft swelling.

Can a vaccinated dog get leptospirosis?

The current vaccine only protects against certain types of the multiple different variations of Leptospira bacteria that cause leptospirosis. However, having your dog vaccinated does decrease their risk of becoming sick with leptospirosis.

Do all rats carry leptospirosis?

Leptospirosis can infect almost any animal where it is harboured in the kidneys, but most commonly it is found in rats and cattle, and is spread by their urine. It is not known to cause any noticeable illness in rats, so populations are unaffected by high levels of infection.

How do you know a dog has a fever?

The most common symptoms of a fever in dogs are:

  1. Loss of appetite.
  2. Shivering.
  3. Panting.
  4. Red or glassy-looking eyes.
  5. Warm ears and/or nose.
  6. Runny nose.
  7. Decreased energy.
  8. Coughing.

How do vets treat leptospirosis in dogs?

Leptospirosis is treatable with antibiotics. If an animal is treated early, it may recover more rapidly and any organ damage may be less severe. Other treatment methods, such as dialysis and hydration therapy may be required.

What happens if leptospirosis is left untreated?

Without treatment, Leptospirosis can lead to kidney damage, meningitis (inflammation of the membrane around the brain and spinal cord), liver failure, respiratory distress, and even death.

Which organ system of animals is most commonly affected by leptospirosis?

Leptospirosis (LEP-toe-sp-ROW-sis) is caused by spiral shaped bacteria that can damage to the liver, kidneys and other organs of animals and humans.