A patient has a serious respiratory infection. A sputum sample yielded a bacterium that did not have any peptidoglycan. You can hypothesize that the identity of this microbe could possibly be _____.
A. Mycoplasma pneumoniae
B. Staphylococus aureus
C. Mycobacterium tuberculosis
D. Borrelia burgdorferi
E. Streptococcus pneumoniae
