RT Journal Article SR Electronic T1 Randomised trial of azithromycin to eradicate Ureaplasma in preterm infants JF Archives of Disease in Childhood - Fetal and Neonatal Edition JO Arch Dis Child Fetal Neonatal Ed FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 615 OP 622 DO 10.1136/archdischild-2019-318122 VO 105 IS 6 A1 Viscardi, Rose Marie A1 Terrin, Michael L A1 Magder, Laurence S A1 Davis, Natalie L A1 Dulkerian, Susan J A1 Waites, Ken B A1 Ambalavanan, Namasivayam A1 Kaufman, David A A1 Donohue, Pamela A1 Tuttle, Deborah J A1 Weitkamp, Jorn-Hendrik A1 Hassan, Hazem E A1 Eddington, Natalie D YR 2020 UL http://fn.bmj.com/content/105/6/615.abstract AB Objective To test whether azithromycin eradicates Ureaplasma from the respiratory tract in preterm infants.Design Prospective, phase IIb randomised, double-blind, placebo-controlled trial.Setting Seven level III–IV US, academic, neonatal intensive care units (NICUs).Patients Infants 240–286 weeks’ gestation (stratified 240–266; 270–286 weeks) randomly assigned within 4 days following birth from July 2013 to August 2016.Interventions Intravenous azithromycin 20 mg/kg or an equal volume of D5W (placebo) every 24 hours for 3 days.Main outcome measures The primary efficacy outcome was Ureaplasma-free survival. Secondary outcomes were all-cause mortality, Ureaplasma clearance, physiological bronchopulmonary dysplasia (BPD) at 36 weeks’ postmenstrual age, comorbidities of prematurity and duration of respiratory support.Results One hundred and twenty-one randomised participants (azithromycin: n=60; placebo: n=61) were included in the intent-to-treat analysis (mean gestational age 26.2±1.4 weeks). Forty-four of 121 participants (36%) were Ureaplasma positive (azithromycin: n=19; placebo: n=25). Ureaplasma-free survival was 55/60 (92% (95% CI 82% to 97%)) for azithromycin compared with 37/61 (61% (95% CI 48% to 73%)) for placebo. Mortality was similar comparing the two treatment groups (5/60 (8%) vs 6/61 (10%)). Azithromycin effectively eradicated Ureaplasma in all azithromycin-assigned colonised infants, but 21/25 (84%) Ureaplasma-colonised participants receiving placebo were culture positive at one or more follow-up timepoints. Most of the neonatal mortality and morbidity was concentrated in 21 infants with lower respiratory tract Ureaplasma colonisation. In a subgroup analysis, physiological BPD-free survival was 5/10 (50%) (95% CI 19% to 81%) among azithromycin-assigned infants with lower respiratory tract Ureaplasma colonisation versus 2/11 (18%) (95% CI 2% to 52%) in placebo-treated infants.Conclusion A 3-day azithromycin regimen effectively eradicated respiratory tract Ureaplasma colonisation in this study.Trial registration number NCT01778634.