Spectrum of Activity: Which Bacteria Do They Target?

Zithromax (azithromycin) and ciprofloxacin target different types of bacteria. Azithromycin, a macrolide, effectively treats infections caused by Haemophilus influenzae, Moraxella catarrhalis, Streptococcus pneumoniae (some strains), and Chlamydia trachomatis. It also works against certain atypical bacteria like Mycoplasma pneumoniae and Legionella pneumophila.

Ciprofloxacin, a fluoroquinolone, boasts a broader spectrum, tackling gram-negative bacteria like Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Salmonella species more effectively than azithromycin. It’s also used against some gram-positive bacteria, including Staphylococcus aureus (though resistance is increasing). However, ciprofloxacin generally shows less activity against atypical bacteria compared to azithromycin.

The choice between these antibiotics depends entirely on the identified bacteria causing the infection. Laboratory testing to determine the infecting organism’s sensitivity is crucial for optimal treatment. Always follow your doctor’s prescription; self-treating can lead to antibiotic resistance.