LEGIONNAIRES’ DISEASE – DIAGNOSIS

It usually starts as a mild respiratory infection, similar to any one of a number of viral respiratory infections but, within 48 hours, the condition worsens, the temperature rises considerably, a dry cough develops and there may be confusion if the brain is affected.

Many other organs throughout the body are involved.

The diagnosis is difficult to make, and the germ is hard to isolate.

It may be that the true diagnosis is not established for several weeks after the onset of the infection, by which time the patient has usually recovered.

A high degree of suspicion is more likely to lead to early diagnosis or certainly to the correct treatment being instituted while proof of the diagnosis is being pursued.

This germ does not respond to penicillin, and is also poorly controlled by many antibiotics. Erythromycin appears to be the preferred drug but this may need to be continued over at least two weeks.

Any of a number of types of pneumonia can mimic Legionnaires’ disease.

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