Leptospirosis is caused by bacteria that can infect many types of mammals, birds, amphibians, and reptiles. It is transmitted through contact with infected animal urine. Symptoms range from flu-like symptoms to meningitis, liver damage, and kidney failure. It can be misdiagnosed due to its wide range of symptoms. Antibiotics like penicillin or doxycycline are used to treat it, with severe cases requiring hospitalization and supportive care. Rates of infection vary globally but are higher in tropical climates with warm, moist conditions.