A member asked:

I have a terrible staph infection and just got a new boil after being on keflex for 3 days, does this mean it's resistant?

4 doctors weighed in across 2 answers

Maybe: If you have recurrent staph infection, it is possible that you are colonized with the bacteria or the staph was resistant to the antibiotic, ( MRSA is resistant to keflex), it may be necessary to have your doctor run a culture and sensitivity test of the bacteria.

Answered 6/10/2014

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Dr. Joel Gallant answered

Specializes in Infectious Disease

Probably: Most boils these days are caused by mrsa, which is resistant to Keflex and related antibiotics. A culture of the pus will confirm this.

Answered 3/9/2017

5.6k views

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