A broad-spectrum antimicrobial agent that includes most microorganisms that cause urinary tract infections.
Nitroxoline selectively inhibits the synthesis of bacterial DNA and has an effect as on Gram-positive microorganisms: Streptococcus spp. (including beta-hemolytic streptococci, Streptococcus pneumoniae, Enterococcus faecalis), Corynebacterium diphtheriae, Bacillus subtilis; and on gram-negative microorganisms: E. coli, N.gonorrhoeae, Salmonella spp., Shigella spp., and Ureaplasma urealyticum, Mycoplasma hominis.
Nitroxoline is also active in relation to Mycobacterium tuberculosis, Trichomonas vaginalis, some species of fungi (Candida spp., dermatophytes, molds, some pathogens of deep mycoses).
Unstable sensitivity to nitroxoline have: Proteus spp., Staphylococcus spp.
Resistant to nitroxoline: Pseudomonas spp., Providencia spp., Klebsiella spp., Enterobacter spp., Serratia spp., anaerobic bacteria.