2010.08.05 Quiz: Mycoplasma pneumonia

About Mycoplasma pneumonia, which of the following is incorrect?
A. Most cases are mild, and so it is called "walking pneumonia", though sometimes it can be very severe to cause respiratory failure.
B. The reason why it is insensitive to beta-lactam antibiotic is because it has no cell wall for beta-lactam antibiotic to act on, and also therefore it cannot be stained by gram stain.
C. Presence of upper respiratory tract symptoms like pharyngitis, sore throat and hoarseness of voice makes Mycoplasma infection very unlikely.
D. CNS manifestations are the most frequent extrapulmonary complications.
E. A macrolide-resistant Mycoplasm pneumoniae strain has been isolated from the patients with community-acquired pneumonia in Japapn, and which improved after fluoroquinolone administration