Efficacy of azithromycin in reducing lower genital Ureaplasma urealyticum colonization in women at risk for preterm delivery

OBJECTIVE

The purpose of this study was to determine if azithromycin is effective in reducing lower genital colonization of Ureaplasma urealyticum in women with preterm labor or preterm premature rupture of membranes (PROM).

METHODS

A randomized, double-blinded, placebo-controlled prospective study of 60 pregnancies was carried out between 22 and 34 weeks. Genital mycoplasma cultures were performed at the time of admission. Patients were randomized to receive either a single dose of azithromycin (four 250 mg capsules) or a placebo in addition to prophylactic intravenous ampicillin. Repeat cultures were done on undelivered patients 7 days after enrollment. The study had power to detect a 50% decrease in colonization.

RESULTS

Overall, lower genital colonization was 47/59 (79.7%) for U. urealyticum. Seven days after enrollment, U. urealyticum was isolated in 14/15 (93.3%) of the azithromycin-treated cases and in 11/14 (78.6%) of the controls (RR = 1.19, 95% CI = 0.88-1.61). Vertical transmission of U. urealyticum was 3/15 (20%) in the azithromycin-treated cases and 5/10 (50%) for the controls (RR = 0.40, 95%, CI = 0.12-1.31).

CONCLUSION

These data suggests that a single 1 g dose of azithromycin is ineffective in reducing lower genital colonization with U. urealyticum.

The efficacy of prophylactic erythromycin in preventing vertical transmission of Ureaplasma urealyticum

To determine if prophylactic erythromycin alters the vertical transmission rate of Ureaplasma urealyticum. Randomized prospective study of 51 singleton pregnancies between 22 and 35 weeks' gestation with preterm premature rupture of membranes or preterm labor. Patients received oral erythromycin for 7 days in addition to routine prophylactic intravenous ampicillin or ampicillin alone. Lower genital colonization with U. urealyticum was 33 of 51 (65%). Vertical transmission of U. urealyticum was 25% (3 of 12) in the erythromycin group and 4 of 17 (24%) for the controls. The average interval from randomization to delivery was 303.5 hr in the erythromycin group and 70.9 hr for controls (p = 0.04). Although not statistically significant, histologic chorioamnionitis in patients colonized with Ureaplasma was lower in the erythromycin group (3 of 12, 25%) compared to the controls (10 of 17, 59%). Prophylactic erythromycin does not decrease vertical transmission of Ureaplasma. It may decrease the incidence of histologic chorioamnionitis and increase the latency period.

Pregnancy complicated by von Hippel-Lindau disease

BACKGROUND

Von Hippel-Lindau disease is an autosomal-dominant genetic disorder with variable penetrance characterized by multiorgan hemangioblastomas and a predisposition to carcinoma.

CASE

A 23-year-old pregnant woman at 35 weeks' gestation, with a family history of von Hippel-Lindau disease, presented with paraplegia caused by an acute intramedullary hemorrhage from a spinal hemangioma at the thoracic (T) 4-5 level. An unruptured hemangioblastoma was noted at the T7-8 level. A T3-6 laminectomy resulted in the improvement of symptoms. The postoperative period was complicated by autonomic dysreflexia and preterm labor. The woman was delivered by cesarean under epidural anesthesia.

CONCLUSION

Pregnant patients with von Hippel-Lindau disease present problems related to hemangioblastomas of the central nervous system. Imaging studies of the central nervous system are mandatory for prompt recognition and treatment of complications related to intramedullary hemorrhage. If spinal hemangioblastomas are identified, cesarean delivery may be the most sensible choice.