A pt. treated for staph epi. peritonitis with IP antibiotics per ISPD guidelines. Post antibiotics his cultures still show staph epi but cell count and diff. is negative. How can the cell count but normal but still staph epi?

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LuAnne W., Nurse from Home Dialysis Program asked
A pt. treated for staph epi. peritonitis with IP antibiotics per ISPD guidelines. Post antibiotics his cultures still show staph epi but cell count and diff. is negative. How can the cell count but normal but still staph epi?

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Doctor (Canada) November 1, 2019

If the patient has no pain and the effluent is clear with a normal cell count, the Staph epi on the follow up culture may simply be a contaminant. It would be best to repeat the cell count and culture to confirm that this is the case. 

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