Welcome to Healthcaremagic,Mupirocin
is actually a drug more active against Staphyloccus.
It would have been better for me if you could provide the duration of your treatment. You may need to do a repeat culture and sensitivity of the lesions in a lab with facility for microbiological works. Nasal mupirocin is administered in carriers of Staphylococcus/MRSA. Antibiotic is definitely needed for the organism based on susceptibility testing results, however eradication from such sites are needed in order to stop recurrence. For Klebsiella, mupirocin has hardly any role.
Hope it is understood.
Have a nice day.