Clarithromycin in preventing bronchopulmonary dysplasia in Ureaplasma urealyticum-positive preterm infants

Pediatrics. 2011 Dec;128(6):e1496-501. doi: 10.1542/peds.2011-1350. Epub 2011 Nov 28.


Objective: To evaluate the efficacy and safety of clarithromycin treatment in preventing bronchopulmonary dysplasia (BPD) in Ureaplasma urealyticum-positive preterm infants.

Patients and methods: Nasopharyngeal swabs for U urealyticum culture were taken from infants with a birth weight between 750 and 1250 g in the first 3 postnatal days. Infants with a positive culture for U urealyticum were randomly assigned to 1 of 2 groups to receive either intravenous clarithromycin or placebo. All the patients were followed at least up to the 36th postmenstrual week.

Results: A total of 224 infants met the eligibility criteria of the study. Seventy-four (33%) infants had a positive culture for U urealyticum in the first 3 day cultures. The rate of BPD development was significantly higher in patients with U urealyticum positivity (15.9% vs 36.4%; P < .01). However, multivariate logistic regression analysis failed to reveal a significant association between the presence of U urealyticum and BPD development (odds ratio: 2.4 [95% confidence interval: 0.9-6.3]; P = .06). Clarithromycin treatment resulted in eradication of U urealyticum in 68.5% of the patients. The incidence of BPD was significantly lower in the clarithromycin group than in the placebo group (2.9% vs 36.4%; P < .001). Multivariate logistic regression analysis confirmed the independent preventive effect of clarithromycin for the development of BPD (odds ratio: 27.2 [95% confidence interval: 2.5-296.1]; P = .007).

Conclusions: Clarithromycin treatment prevents development of BPD in preterm infants who are born at 750 to 1250 g and colonized with U urealyticum.

Publication types

  • Randomized Controlled Trial

MeSH terms

  • Anti-Bacterial Agents / therapeutic use*
  • Bronchopulmonary Dysplasia / etiology*
  • Bronchopulmonary Dysplasia / prevention & control*
  • Clarithromycin / therapeutic use*
  • Female
  • Humans
  • Infant, Newborn
  • Infant, Premature
  • Infant, Premature, Diseases / prevention & control*
  • Male
  • Prospective Studies
  • Ureaplasma Infections / complications*
  • Ureaplasma Infections / drug therapy*
  • Ureaplasma urealyticum*


  • Anti-Bacterial Agents
  • Clarithromycin