Medicines for Leptospirosis

What it is

Leptospirosis is a bacterial infection spread by bacteria carried in the urine of infected animals — particularly rats, but also other animals such as cattle, pigs and dogs. People catch it through contact with water, soil or mud contaminated with the urine of infected animals, with the bacteria entering the body through cuts and grazes, or the lining of the eyes, nose or mouth. This means people at higher risk include those who take part in freshwater activities (such as swimming, kayaking or other water sports in lakes, rivers and canals), and certain workers (such as farmers, sewer and water workers, and vets). Many infections cause no symptoms or a mild, flu-like illness — with fever, headache, muscle aches (particularly in the calves), chills, and sometimes red eyes, a few days to a couple of weeks after exposure. Most people recover. However, a smaller number develop a more severe form (known as Weil's disease), which can affect the liver, kidneys and other organs, causing jaundice, kidney problems and, rarely, serious illness — which is why leptospirosis is taken seriously, particularly after relevant exposure.

How it is treated

Leptospirosis is treated with antibiotics, which are more effective when started early, so recognising it after relevant exposure matters. For milder illness, antibiotics and supportive care (rest, fluids, and treating symptoms) usually lead to recovery. The more severe form (Weil's disease) needs hospital treatment, sometimes intensive, with antibiotics and support for the affected organs (such as the kidneys), and most people recover with prompt care. Diagnosis is based on the symptoms, the exposure history, and blood tests. Telling the doctor about any relevant exposure — freshwater activities, or work involving animals, water or sewage — is important, as it helps them consider leptospirosis and start treatment. Prevention is important for those at risk: covering cuts and grazes with waterproof plasters before freshwater activities or at-risk work, showering after exposure, avoiding swallowing water, wearing protective clothing where appropriate, and rodent control. The reassuring message is that most leptospirosis is a mild, treatable illness, and even the more severe form usually responds to prompt antibiotic and supportive treatment.