Klebsiella sp.’s infection has been a serious problem as catheter associated urinary tract infection at hospital. Klebsiella sp.’s resistance to ampicillin has been found 100 % in Indonesia and it is caused by a new strain of bacteria which can produce SHV, CTX-M and PER type Extended Spectrum Betalactamase(ESBL). The study was to know ampicillin’s sensitivity between Klebsiella sp. as ES…