My Mother 73yers Lastly 25 March One Surgery Done For

my mother 73yers lastly 25 march one surgery done for puting pacemaker then release 29th after 10 days pus seen there docter admited on 10 th April treated with diabetic food inj targocid 400mg 7 vial and pipercillin tazobactam about 16 vials then collect pus on 9th April .from lab repoted afb positive then doctor relese on 10 th with advise cifran 500 claribid 500 twice daily after seven days on 27th april pus collect and afb positive then start akt 4 and above antibiotics and advised dressing after one day. after taking akt 4 three days after pus collect and tested afb shows negative .please do advise better treatment. I also send pus for bectec culture.