Comparison of two antibiotic regimens for neonatal necrotizing enterocolitis.

Treatment of neonatal necrotizing enterocolitis (NEC) regularly includes broad-spectrum antibiotics but there has been no comparative study of alternative regimens. We have studied 90 infants with definite NEC; 46 cases in 1982-3 were treated with ampicillin and gentamicin, while 44 cases in 1984-5 received cefotaxime and vancomycin. Groups were well matched and managed uniformly. Infants greater than or equal to 2200 g birthweight did well with either regimen. Smaller infants given cefotaxime and vancomycin had a lower risk of culture-positive peritonitis (P = 0.01), and as a result, were less likely to die (P = 0.048) or develop thrombocytopenia (P = 0.004). The better outcome might be explained by the greater suppression by cefotaxime and vancomycin of the gut flora of treated patients (P less than 0.001). Both regimens were well-tolerated. Our data suggest that carefully chosen antibiotic regimens can improve the outcome of NEC.