MRSA Fluoroquinolones – An Interesting Bunch Playing a High-Stakes Game

Fluoroquinolones (FQ) of the ofloxacin/ciprofloxacin generation were mainly active against Gram-negative bacteria, distinguishing themselves as cidal IV/PO drugs with high potency against most lactose- and non-lactose fermenters.  They were excellent against problem pathogens like P. aeruginosa, had excellent efficacy against Salmonellae, the Gonococcus and other Neisseriae, and you could count on them for Continue reading MRSA Fluoroquinolones – An Interesting Bunch Playing a High-Stakes Game

Treating GC in the Face of Dwindling Antibiotic Options – (2)

For GC antibiotics, the development path looks like a trip down the road less traveled, leading into some uncharted territory. Let’s take Melinta’s statement [1] at face value according to which the single 900 mg dose of delafloxacin failed because of “insufficient efficacy”. So, what then determines efficacy?  Delafloxacin’s MIC90 was Continue reading Treating GC in the Face of Dwindling Antibiotic Options – (2)

A GO / NO GO decision:  Delafloxacin Stumbles in Gonorrhea Study

The treatment history of N. gonorrhoeae makes for fascinating reading.  This organism has always been able to keep the upper hand in the war of bug versus drug.  Once susceptible to sulfa drugs, to penicillin, tetracyclines and fluoroquinolones, it sequentially become resistant in the matter of a decade to every Continue reading A GO / NO GO decision:  Delafloxacin Stumbles in Gonorrhea Study