<prompt> A patient admitted to an ICU is on central venous line for the last one week. He is on ceftazidime and amikacin. After 7 days of antibiotics he develops a spike of fever and his blood culture is positive for gram positive cocci in chains, which are catalase negative. Following this, vancomycin was started but the culture remained positive for the same organism even after 2 weeks of therapy. The most likely organism causing infection is-Staphylococcus aureusViridans streptococciEnterococcus faecalisCoagulase negative Staphylococcus  <response>: This is case of VRE Vancomycin resistant EnterococciPoints in favor:Gramve cocci in chain and Catalase ve points towards Streptococcaceae familyResistant to aminoglycoside, cephalosporins and vancomycinS, aureus and CONS are catalase ve, hence they are ruled out. 