Antimicrobial spectrum
(1) Gram-positive aerobic bacteria, such as Staphylococcus aureus, Streptococcus pyogenes (group A β-hemolytic streptococcus), pneumococcus, α-hemolytic streptococcus (group A viridans streptococcus) and other streptococci Coccus, Diphtheria (Coryneform) Bacillus.
(2) Gram-negative aerobic bacteria, such as Haemophilus influenzae, Haemophilus parainfluenzae, Catarella, Acinetobacter, Yersinia, Legionella pneumophila, Bacillus pertussis, Bacillus parapertussis, Shigella, Pasteurella, Vibrio cholerae, Vibrio parahaemolyticus, Pyromonas shigella. The activities against Escherichia coli, Salmonella Enteritidis, Salmonella typhi, Enterobacter, Aeromonas hydrophila and Klebsiella are not the same, and a sensitivity test is required.
(3) Anaerobic bacteria, such as Bacteroides, Clostridium perfringens, Peptococcus, Peptostreptococcus, Fusobacterium necrosis, and Propionibacterium acnes.
(4) Microorganisms of sexually transmitted diseases, such as Chlamydia trachomatis, Treponema pallidum, Neisseria gonorrhoeae, Haemophilus duke.
(5) Other microorganisms, such as Borrelia (Lyme pathogen), Chlamydia pneumoniae, Mycoplasma pneumoniae, Mycoplasma hominis, Ureaplasma urea, Campylobacter, Listeria monocytogenes. Azithromycin is cross-resistant to erythromycin-resistant Gram-positive bacteria and methicillin-resistant Staphylococcus strains. It is usually resistant to Gram-positive bacteria such as Proteus, Serratia, Morganella, and Pseudomonas aeruginosa.