Background Ototopical agents are extensively used for otitis esterna (OE),
acute otitis media identified by otorrhea in patients who have tympanostomy
tubes (AOM-TT) and chronic suppurative otitis media (CSOM). The quinolones
have particular value as ototopical agents because of the broad spectrum o
f antibacterial activity of importance in otic diseases and the high concen
trations of antibacterial activity at the site of infection
Methods. A survey of literature on in vitro activity and microbiologic effi
cacy in clinical trials of quinolone otic products for OE, AOM-TT and CSOM
Results, OE: Floxin otic and Cortisporin TC otic suspension were equally ef
fective in eradicating the three major pathogens Pseudomonas aeruginosa, Pr
oteus mirabilis and Staphylococcus aureus, CSOM: Ofloxacin otic was effecti
ve in an open label trial in uniform eradication of S, aureus, P, aeruginos
a, Proteus mirabilis and Enterobacter spp, AOM-TT: Ofloxacin otic and amoxi
cillin/clavulanate (by mouth) were equivalent clinically; rates of eradicat
ion of initial. pathogens were similar for Streptococcus pneumoniae, Haemop
hilus influenzae and Moraxella catarrhalis, but ofloxacin otic was superior
in eradication of S, aureus and P, aeruginosa.
Conclusions. In each of the studies of OE, CSOM and AOM-TT, ofloxacin otic
solution was effective in eradicating the bacterial pathogen from the site
of infection: equivalent to Cortisporin for children with OE; superior to a
moxicillin/clavulanate for patients with AOM-TT who had acute drainage; and
effective in eradicating bacterial pathogens from the external canal of pa
tients with CSOM.