Multidisciplinary prospective study of mother-to-child chikungunya virus infections on the island of La Réunion.Reportar como inadecuado

Multidisciplinary prospective study of mother-to-child chikungunya virus infections on the island of La Réunion. - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

* Corresponding author 1 Centre d-Investigation Clinique Regional Epidemiologie Clinique-essais Cliniques - Ile de la Reunion 2 Service de réanimation néonatologique et pédiatrique La Réunion 3 Service de gynécologie-obstétrique La réunion 4 Service de microbiologie 5 Service de neuroradiologie La réunion 6 Service de médecine foetale et foetopathologie 7 Centre national de Référence et Centre Collaborateur de l-OMS Arbovirus CNR-CCOMS 8 Equipe avenir Microorganismes et Barrières de l-Hôte 9 Pathogénie Virale Moléculaire 10 Service des Maladies Infectieuses et Tropicales

Abstract : BACKGROUND: An outbreak of chikungunya virus affected over one-third of the population of La Réunion Island between March 2005 and December 2006. In June 2005, we identified the first case of mother-to-child chikungunya virus transmission at the Groupe Hospitalier Sud-Réunion level-3 maternity department. The goal of this prospective study was to characterize the epidemiological, clinical, biological, and radiological features and outcomes of all the cases of vertically transmitted chikungunya infections recorded at our institution during this outbreak. METHODS AND FINDINGS: Over 22 mo, 7,504 women delivered 7,629 viable neonates; 678 9.0% of these parturient women were infected positive RT-PCR or IgM serology during antepartum, and 61 0.8% in pre- or intrapartum. With the exception of three early fetal deaths, vertical transmission was exclusively observed in near-term deliveries median duration of gestation: 38 wk, range 35-40 wk in the context of intrapartum viremia 19 cases of vertical transmission out of 39 women with intrapartum viremia, prevalence rate 0.25%, vertical transmission rate 48.7%. Cesarean section had no protective effect on transmission. All infected neonates were asymptomatic at birth, and median onset of neonatal disease was 4 d range 3-7 d. Pain, prostration, and fever were present in 100% of cases and thrombocytopenia in 89%. Severe illness was observed in ten cases 52.6% and mainly consisted of encephalopathy n = 9; 90%. These nine children had pathologic MRI findings brain swelling, n = 9; cerebral hemorrhages, n = 2, and four evolved towards persistent disabilities. CONCLUSIONS: Mother-to-child chikungunya virus transmission is frequent in the context of intrapartum maternal viremia, and often leads to severe neonatal infection. Chikungunya represents a substantial risk for neonates born to viremic parturients that should be taken into account by clinicians and public health authorities in the event of a chikungunya outbreak.

Autor: Patrick Gérardin - Georges Barau - Alain Michault - Marc Bintner - Hanitra Randrianaivo - Ghassan Choker - Yann Lenglet - Yasmin



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