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PP-270. HLA and bronchopulmonary dysplasia susceptibility

2010, Early Human Development

From a total of 94 children (52-GA; 42-GB), 26/52(50%) and 30/42 (71%) infants of group A and B, respectively, had indication for PVZ prophylaxis. In GB, 14/30(47%) were immunized. The estimated cost of prophylaxis (5 doses) was 26,000 €-GA and 30,000 €-GB. Ten infants (17.8%) were admitted with RSV bronchiolitis: 8(31%)-GA and 2(6.6%)-GB, median age 4 months (range 1-22) and 80% male. In GA, 4(50%) children were admitted to paediatric intensive care unit (PICU), 3 needing mechanical ventilation. One infant was readmitted. In GB, one infant, admitted for 11 days in the PICU without mechanical ventilation, was infected 13 days after 2 doses of PVZ. The other, was admitted in the nursery 40 days after the fifth dose of PVZ. The total cost of admission was 36,129 €-GA and 27,318 €-GB. Comparing both groups, mechanical ventilation was only needed for GA (1.62 vs. 0; p = 0.003). No differences occurred between total and PICU length of stay (8.

S124 Abstracts Results From a total of 94 children (52-GA; 42-GB), 26/52(50%) and 30/42 (71%) infants of group A and B, respectively, had indication for PVZ prophylaxis. In GB, 14/30(47%) were immunized. The estimated cost of prophylaxis (5 doses) was 26,000 €-GA and 30,000 €-GB. Ten infants (17.8%) were admitted with RSV bronchiolitis: 8(31%)-GA and 2(6.6%)-GB, median age 4 months (range 1–22) and 80% male. In GA, 4(50%) children were admitted to paediatric intensive care unit (PICU), 3 needing mechanical ventilation. One infant was readmitted. In GB, one infant, admitted for 11 days in the PICU without mechanical ventilation, was infected 13 days after 2 doses of PVZ. The other, was admitted in the nursery 40 days after the fifth dose of PVZ. The total cost of admission was 36,129 €-GA and 27,318 €-GB. Comparing both groups, mechanical ventilation was only needed for GA (1.62 vs. 0; p = 0.003). No differences occurred between total and PICU length of stay (8.8 vs. 10.5; p = 0.07) (3.5 vs. 5.5; p = 0.12). (31.6%) developed hyperbilirubinemia and 11(4.2%) feeding difficulties. 11(4.2%) neonates had congenital hypothyroidism. Finally, 38(14.8%) presented septicemia, 3(1.17%) urinary infection, 6(2.34%) viral infection and 8(3.1%) bronchiolitis. Conclusions Late preterm neonates may develop severe illness during the neonatal period. It is important to follow thoroughly the high risk pregnancies and reconsider the indications of preterm delivery of these neonates. It is a population that besides morbidity during the neonatal period may present long term difficulties and need to be included in follow up programs. doi:10.1016/j.earlhumdev.2010.09.325 Conclusions PP-270. HLA and bronchopulmonary dysplasia susceptibility In this study, although the limited sample size, results suggest that the cost of admission, as well as the clinical severity is higher in non immunized infants. Although indirect costs were not analyzed, it seems reasonable to use PVZ in this population. Gustavo Rochaa, Hercilia Guimaraesa, Elisa Proencab, Augusta Areiasb, Fatima Freitasc, Bruno Limac, Teresa Rodriguesd, Helena Alvesc a Division of Neonatology, Department of Pediatrics, Hospital De São João, Faculty of Medicine of Porto University, Portugal b Division of Neonatology, Maternity Júlio Dinis, Porto Hospital Centre, Portugal c Centre of Histocompatibility of Porto, Portugal d Department of Hygiene And Epidemiology, Faculty of Medicine of Porto University, Portugal doi:10.1016/j.earlhumdev.2010.09.324 PP-269. Neonatal morbidity of late preterm neonates Aim Fani Anatolitou, Helen Bouza, Niki Lipsou, Marina Anagnostakou B' Neonatal Intensive Care Unit, “Aghia Sophia” Children's Hospital, Athens, Greece Aim Late preterm neonates (34–36 + 6 weeks gestation) are less mature compared to full term neonates. Thus, they are at increased risk of morbidity and mortality. The aim of the study was to evaluate the problems of late preterm neonates that needed admission in a Neonatal Intensive Care Unit (NICU). Materials and methods Late preterm neonates hospitalized in our Neonatal Intensive Care Unit between 2005 and 2009 were evaluated regarding the morbidity and mortality and the reasons for late preterm delivery. Background — There is little data on the association between Human Leucocyte Antigen (HLA) alleles and Bronchopulmonary Dysplasia (BPD) of the preterm newborn. Aim — To assess associations between HLA alleles and BPD susceptibility. Materials and methods We studied 156 preterm neonates (82 M/74 F) < 32 weeks gestational age, alive at 36 weeks gestational age. Detailed clinical data were collected. HLA typing was performed by PCR-SSO. HLA allele frequencies where determined by direct counting for BPD and no-BPD groups. Comparison between BPD and no BPD groups was performed using t-test, χ2 test or Fisher exact test and logistic regression as appropriate. Relative risks (RR) and their 95% confidence intervals (95% CI) were also calculated as association measures. Results Results Out of 1801 neonates admitted in our unit within the period studied, 257 neonates were late preterm. Gestational age was 35.2 ± 0.83 weeks and Birth Weight 2388.75 ± 536.08 g. 168(65.3%) neonates were born with cesarean section.The indications for cesarean section varied, including maternal medical conditions, complications of pregnancy, abnormal conditions of the foetus, or high risk pregnancies due to IVF or multiple gestation. 38 (14.78%) were born following IVF, 51(20.7%) were born after multiple pregnancies. 25(9.7%) were small for gestational age. Mortality and morbidity during hospitalization in the NICU: 16(6.2%) neonates died. 96(37.5%) presented respiratory problems (respiratory distress syndrome or wet lung disease — 36 needed mechanical ventilation) 9(3.5%) presented pulmonary hypertension, and 4(1.56%) apneas. 13(5%) neonates developed necrotizing enterocolitis.(6 needing surgical intervention.). 8(3.1%) presented neonatal encephalopathy, and 6(2.3%) intraventricular haemorrhage on Ultrasound, mainly grade I. 81 We diagnosed 56 (35.9%) neonates with mild BPD and 27 (17%) with moderate/severe BPD. We found a significant association between HLA-DRB1*01 and mild BPD (OR = 3.48]1.23–10.2[).The alleles HLA-A*24, -A*68, -B*51,-Cw*07, -Cw*14, -Cw*15 and -DRB1*01 presented a significant association with moderate/ severe BPD. When adjusted to gestational age and birth weight HLA-A*68 (OR = 5.41] 1.46; 20.05[), -B*51 (OR = 3.09]1.11; 8.63[) and -Cw*14 (OR = 4.94] 1.15; 21.25[) were significantly associated with moderate/severe BPD. Conclusions Our findings suggest an association between HLA-A*68, -B*51 and -C*14 and BPD susceptibility. doi:10.1016/j.earlhumdev.2010.09.326