The researchers collected data on antibiotic use, lab tests, cultures, and clinical outcomes from the remaining 277 well-appearing newborns; 88% did not receive antibiotics during their hospital stay, and 83% underwent no laboratory testing. Only 17% of infants had lab testing for sepsis; none had culture result–positive, early-onset sepsis.
Only 12% of infants who initially appeared well developed signs/symptoms of sepsis, underwent laboratory testing, and received antibiotics. Nearly half of these (5% of all infants) received antibiotic treatment for at least 5 days despite negative cultures, while the other 7% received antibiotics for less than 48 hours, Dr. Joshi and her colleagues reported.
Infants with at least 34 weeks’ gestation receiving antibiotics at the hospital dropped from 12.3% before the initiative to 5.5% afterward, a 55% decrease (95% confidence interval, 40%-60%), the researchers said. Study limitations included a lack of postdischarge follow-up, the variability in physician decisions about which infants were symptomatic and which ones needed antibiotics, and an inability to generalize findings to institutions without 24/7 availability of neonatal hospitalists.
Past studies have found that all newborns with positive cultures showed symptoms at birth and needed resuscitation, continuous positive airway pressure, or intubation.