Listeriosis

An infection that is common in animals and may also affect humans. It is caused by the bacterium, which is widespread in the environment, especially in soil. Possible sources of human infection include soft cheese, ready-prepared coleslaw and salads, and improperly cooked meat. In most adults, the only symptoms are fever and aching muscles. There may also be sore throat, conjunctivitis, diarrhoea, and abdominal pain. Pneumonia, septicaemia, and meningitis may develop in severe cases. However, listeriosis can be life-threatening, particularly in elderly people, those with reduced immunity, and newborn babies. In pregnant women, infection may cause a miscarriage. The condition is diagnosed by blood tests and analysis of other body fluids, such as urine. Treatment is with antibiotic drugs, such as ampicillin.