Mycoplasma pneumoniae (Mp) positivity and TNF-α levels in asthmatic samples. A, TNF-α in human BAL fluid (fold over healthy subjects). **P < .01, asthmatic patients (high) versus asthmatic patients (low) and both asthma groups versus healthy subjects. B, RT-PCR for M pneumoniae–specific P1 adhesin and dilution of samples into SP-4 broth to verify M pneumoniae positivity in subjects. *P < .05, asthmatic patients (high) versus healthy subjects and asthmatic patients (low). C, TNF values in M pneumoniae–positive and M pneumoniae–negative samples. **P < .01.