In vitro activities of azithromycin (CP 62,993), clarithromycin (A-56268; TE-031), erythromycin, roxithromycin, and clindamycin.

@article{Barry1988InVA,
  title={In vitro activities of azithromycin (CP 62,993), clarithromycin (A-56268; TE-031), erythromycin, roxithromycin, and clindamycin.},
  author={Arthur L. Barry and Ronald N. Jones and Clyde Thornsberry},
  journal={Antimicrobial agents and chemotherapy},
  year={1988},
  volume={32 5},
  pages={752-4}
}
The in vitro activity of azithromycin (CP 62,993 or XZ-450) against Haemophilus influenzae was greater than that of three other macrolides. However, azithromycin was four- to eightfold less active than erythromycin against the gram-positive cocci and against Listeria monocytogenes. Erythromycin and azithromycin were similar in their activity against Legionella pneumophila, Neisseria gonorrhoeae, Neisseria meningitidis, and Branhamella catarrhalis.