43: DIFFICULT-TO-TREAT RESISTANCE IN GRAM-NEGATIVE BACTEREMIA AMONG ICU INPATIENTS AT 162 U.S. HOSPITALS. (January 2018) - Kadri, Sameer; Lai, Yi Ling; Spaulding, Alicen; Ricotta, Emily; Prevots, D. Rebecca; Dekker, John; Palmore, Tara; Rhee, Chanu; Klompas, Michael; Powers, John; Suffredini, Anthony; Hooper, David; et al.