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Hart Vets, Browning Drive, Bicester, Oxfordshire OX26 2XL & Frederick Street, Waddesdon, Aylesbury HP18 0LU

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Bicester    01869 323223  24hrs

Aylesbury  01296 651000


Leptospirosis is an unpleasant disease caused by a bacterium that affects many mammals, including people and dogs. The Leptospirosis bacteria is found in the urine of infected animals which contaminates the environment. The organism survives well in damp environments, such as stagnant / slow moving water or moist alkaline soil. Dogs can become infected either by direct contact with the urine of an infected animal, or indirectly for example by swimming in or drinking contaminated water.

Acute cases are seen sporadically in dogs and can be fatal. Many more infections go undiagnosed and can result in kidney and liver complications. In people the principal form of Leptospirosis is commonly known as Weil’s disease. Initial symptoms in people are often described as flu-like but it can prove to be life threatening.

There are many different strains of Leptospirosis and two of the most important strains have been used in vaccines in dogs for over 50 years. However, in recent years, there has been an increase in the number of cases of Leptospirosis caused by  strains not included in the traditional vaccines. Current 2-strain Leptospirosis vaccines only have proven efficacy against 34% of the strains identified in UK laboratory  testing between 2007 and 2011.

At Hart Vets we have changed to the most up-to-date leptospirosis vaccine, Nobivac L4, which covers up to 85% of the strains identified in the UK. The vaccine has been extensively tested and proven to be safe and efficacious. The new Leptospirosis vaccine requires a primary course of two vaccines 4 to 6 weeks apart. After the primary course vaccinated dogs will only require a single booster vaccination annually for subsequent years.

If you have any questions concerning Leptospirosis, or vaccination in general, please do not hesitate to contact us. Further information is available at

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