 1 Polymicrobial abscess - additional organisms isolated from blood or abscess fluid within the preceding 7 days 2a Klebsiella pneumoniae resistant to Ceftriaxone AND Ertapenem 2b Klebsiella pneumoniae resistant to Ciprofloxacin AND Cotrimoxazole 3 On effective IV antibiotics 7 days 4a Hypersensitivity to cephalosporins AND carbapenems; as defined by history of rash, urticaria, angiodema, bronchospasm or circulatory collapse following prior administration. 