Zika Virus Infection and Microcephaly: A Case-Control Study in Brazil.

Background: Brazil presented an alarming number of newborns with microcephaly in the years 2015 and 2016. The investigation of the cases raised the suspicion of the association of these cases with maternal infections by the zika virus. Also, in 2015, there was an epidemic of zika virus infection in Brazil, reinforcing this hypothesis.

Methodology of Maternal and Child Health Populational Surveys: A Statewide Cross-sectional Time Series Carried Out in Ceará, Brazil, from 1987 to 2017, with Pooled Data Analysis for Child Stunting.

Background: Cross-sectional studies are fundamental studies in the practice of epidemiological science. This article aims to present in detail the methodology for conducting a series of cross-sectional studies, as well as the analysis of data through pooled data.

Methods: The series of studies are population cross-sectional studies, with statewide coverage, searching for representative sample of reproductive aged women and pre-school children in Ceará, Brazil.

Hemophagocytic Syndrome in Children With Visceral Leishmaniasis.

Background: Hemophagocytic lymphohistiocytosis (HLH) is a serious complication of visceral leishmaniasis (VL). The aim of this study is to describe demographical, clinical and laboratory features of HLH in children with VL.

Methods: This is a retrospective cohort of children with HLH and VL admitted to a tertiary hospital in Northeast, Brazil, from January 2012 to April 2014.