Azithromycin is effective against susceptible bacteria causing infections of the middle ear, tonsillitis, throat infections, laryngitis, bronchitis and sinuses. It is also effective against certain sexually transmitted infectious diseases, such as non-gonococcal urethritis and cervicitis. It is prescribed against a wide variety of bacteria organisms, such as Hemophilus influenzae, Streptococcus pneumoniae, Mycoplasma pneumoniae, Staphylococcus aureus and mycobacterium avium etc.