Antimicrobial Chemotherapy for Legionnaires' Disease: A Review

Controlled trials of antimicrobialchemotherapy for legionnaires' diseasehave not been performed, although erythromycin and tetracycline appear to be effective therapies. Laboratory data indicate that the activities of the fluoroquinolone and newer macrolide/azalide agents against Legionella pneumophila are superior to that of erythromycin, and case reports substantiate that the activities of these agents are at least equal. Results of clinical treatment with and laboratory testing of macrolides, tetracyclines, co-trimoxazole, chloramphenicol, aminoglycosides, fluoroquinolones, βlactam agents, and streptogramins are reviewed. The drugs of choice for the treatment of legionnaires' disease in immunocompromised or severelyill patients should be one of the fluoroquinolonc antimicrobials rather than erythromycin.