Microbiology Mycoplasma pneumoniae (Eaton agent) is an infectious agent that: A Lacks steroids in its cytoplasmic membrane B Contains muramic acid in its cell wall C Contains only DNA D Causes primary atypical pneumonia 💡 Explanation Mycoplasma pneumoniae (Eaton agent) is an infectious agent that: ✓ Correct Answer: D. Causes primary atypical pneumonia