The effectiveness of newer macrolides in acute Q fever for 113 patients was
recorded. The mean times to defervescence were 2.9 days for doxycycline an
d 3.3, 3.9, 3.9, and 6.4 days for clarithromycin, roxithromycin, erythromyc
in, and beta -lactams, respectively (P < 0.01 for macrolides versus beta -l
actams). We conclude that macrolides may be an adequate empirical antibioti
c therapy for acute Q fever.