Final answer:
The first-line treatment for Myoplasma pneumonia is azithromycin, a macrolide antibiotic that targets bacterial ribosomes.
Step-by-step explanation:
The first-line treatment for Myoplasma pneumonia is a macrolide antibiotic called azithromycin. This antibiotic targets bacterial ribosomes instead of peptidoglycan, making it effective against Mycoplasma pneumoniae, which does not have a cell wall. Azithromycin has shown effectiveness in resolving symptoms of pneumonia caused by Mycoplasma pneumoniae.