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
6.1k views
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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