Bacterial causes of pneumonia include -- Pneumococcus, Staphylococcus, and Gram Negative bacteria in this population.
They also have an increased risk for Legionella pneumophilia pneumonia.
Recommended empiric therapy for pneumonia in the elderly includes a third generation cephalosporin.
However, you may need to add a macrolide for coverage if Legionella is suggested by clinical findings or if there is no improvement in the first few days of therapy.
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