In the other thread @Glenda Heywoodo asked what diseases Baytril (enrofloxacin) will treat, so here is a picture of the bacteria it treats, though some strains of a few bacteria *might* be resistant (E. coli and pseudomonas aeruginosa are two examples).
I'm staring this thread so we can discuss the various options when treating sinus infections. I'm starting it because the thread these were posted on starting going off topic: