5177 infants were admitted to the NICU, of which 4216 were excluded (3848 due to GA > 33 weeks, 139 outborns, 78 due to death prior to 1 week of life, 6 with early-onset sepsis, and 2 with congenital GI anomalies. Of the remaining 961 charts, 29 healthy NEC rule-outs were enrolled, 61 with Stage 2 NEC, 15 with Stage 3 NEC, and 38 with bacteremia.