ABSTRACT
OBJECTIVE: To evaluate the relationship between amniotic fluid interleukin-8 and the presence, severity and pattern of acute inflammatory lesions in the placenta delivered after preterm labor with intact membranes. METHODS: The relationship between placental histologic finding and amniotic fluid interleukin-8 was examined in 46 consecutive patients who were admitted with the diagnosis of preterm labor with intact membranes and who delivered singleton gestations within 5 days. RESULTS: The prevalence of acute histologic chorioamnionitis was 63.0%(29/46) and that of positive amniotic fluid culture was 17.4%(8/46). The most frequent site of histologic inflammation was chorion-decidua(56.5%, 26/46). The median amniotic fluid interleukin-8 increased significantly according to the presence and higher severity of inflammation in each type of placental section (p or = 4) increased significantly in the order of non-marginating, marginating, and mixed (p<0.05 for each). CONCLUSION: Both the presence and greater severity of acute histologic chorioamnionitis are associated with an elevated amniotic fluid interleukin-8. A marginating and mixed pattern of inflammation are associated with a higher amniotic fluid interleukin-8. Amniotic fluid interleukin-8 is a reliable prenatal marker of histologic chorioamnionitis.