How do you advise using Mycoplasma antibody testing to guide antibiotic selection in patients with pneumonia?

I do not.

It takes several days to result, and I would not change treatment duration or choice of antibiotic based on a result.

I treat all patients with pneumonia with a cell wall inhibitor like amoxicillin and something for atypical coverage like azithromycin.

In patients with community-acquired p...