Publicações relacionadas à zika
- Details
In:
Science
Authors:
Nuno Rodrigues Faria, Raimunda do Socorro da Silva Azevedo, Moritz U. G. Kraemer, Renato Souza, Mariana Sequetin Cunha, Sarah C. Hill, Julien Thézé, Michael B. Bonsall, Thomas A. Bowden, Ilona Rissanen, Iray Maria Rocco, Juliana Silva Nogueira, Adriana Yurika Maeda, Fernanda Giseli da Silva Vasami, Fernando Luiz de Lima Macedo, Akemi Suzuki, Sueli Guerreiro Rodrigues, Ana Cecilia Ribeiro Cruz, Bruno Tardeli Nunes, Daniele Barbosa de Almeida Medeiros, Daniela Sueli Guerreiro Rodrigues, Alice Louize Nunes Queiroz, Eliana Vieira Pinto da Silva, Daniele Freitas Henriques, Elisabeth Salbe Travassos da Rosa, Consuelo Silva de Oliveira, Livia Caricio Martins, Helena Baldez Vasconcelos, Livia Medeiros Neves Casseb, Darlene de Brito Simith, Jane P. Messina, Leandro Abade, José Lourenço, Luiz Carlos Junior Alcantara, Maricélia Maia de Lima, Marta Giovanetti, Simon I. Hay, Rodrigo Santos de Oliveira, Poliana da Silva Lemos, Layanna Freitas de Oliveira, Clayton Pereira Silva de Lima, Sandro Patroca da Silva, Janaina Mota de Vasconcelos, Luciano Franco, Jedson Ferreira Cardoso, João Lídio da Silva Gonçalves Vianez-Júnior, Daiana Mir, Gonzalo Bello, Edson Delatorre, Kamran Khan, Marisa Creatore, Giovanini Evelim Coelho, Wanderson Kleber de Oliveira, Robert Tesh, Oliver G. Pybus, Marcio R. T. Nunes, Pedro F. C. Vasconcelos
Brazil has experienced an unprecedented epidemic of Zika virus (ZIKV), with ~30,000 cases reported to date. ZIKV was first detected in Brazil in May 2015 and cases of microcephaly potentially associated with ZIKV infection were identified in November 2015. Using next generation sequencing we generated seven Brazilian ZIKV genomes, sampled from four self-limited cases, one blood donor, one fatal adult case, and one newborn with microcephaly and congenital malformations. Phylogenetic and molecular clock analyses show a single introduction of ZIKV into the Americas, estimated to have occurred between May-Dec 2013, more than 12 months prior to the detection of ZIKV in Brazil. The estimated date of origin coincides with an increase in air passengers to Brazil from ZIKV endemic areas, and with reported outbreaks in Pacific Islands. ZIKV genomes from Brazil are phylogenetically interspersed with those from other South American and Caribbean countries. Mapping mutations onto existing structural models revealed the context of viral amino acid changes present in the outbreak lineage; however no shared amino acid changes were found among the three currently available virus genomes from microcephaly cases. Municipality-level incidence data indicate that reports of suspected microcephaly in Brazil best correlate with ZIKV incidence around week 17 of pregnancy, although this does not demonstrate causation. Our genetic description and analysis of ZIKV isolates in Brazil provide a baseline for future studies of the evolution and molecular epidemiology in the Americas of this emerging virus.
Download full publication:
- Details
In:
Pediatrics
Authors:
Mateusz P. Karwowski, MD, MPH, Jennifer M. Nelson, MD, MPH, J. Erin Staples, MD, PhD, Marc Fischer, MD, MPH, Katherine E. Fleming-Dutra, MD, Julie Villanueva, PhD, Ann M. Powers, PhD, Paul Mead, MD, Margaret A. Honein, PhD, Cynthia A. Moore, MD, PhD, Sonja A. Rasmussen, MD, MSh
Zika virus is a mosquito-borne flavivirus discovered in Africa in 1947. Most persons with Zika virus infection are asymptomatic; symptoms when present are generally mild and include fever, maculopapular rash, arthralgia, and conjunctivitis. Since early 2015, Zika virus has spread rapidly through the Americas, with local transmission identified in 31 countries and territories as of February 29, 2016, including several US territories. All age groups are susceptible to Zika virus infection, including children. Maternal–fetal transmission of Zika virus has been documented; evidence suggests that congenital Zika virus infection is associated with microcephaly and other adverse pregnancy and infant outcomes. Perinatal transmission has been reported in 2 cases; 1 was asymptomatic, and the other had thrombocytopenia and a rash. Based on limited information, Zika virus infection in children is mild, similar to that in adults. The long-term sequelae of congenital, perinatal, and pediatric Zika virus infection are largely unknown. No vaccine to prevent Zika virus infection is available, and treatment is supportive. The primary means of preventing Zika virus infection is prevention of mosquito bites in areas with local Zika virus transmission. Given the possibility of limited local transmission of Zika virus in the continental United States and frequent travel from affected countries to the United States, US pediatric health care providers need to be familiar with Zika virus infection. This article reviews the Zika virus, its epidemiologic characteristics, clinical presentation, laboratory testing, treatment, and prevention to assist providers in the evaluation and management of children with possible Zika virus infection.
Download full publication:
- Details
In:
Prehospital and Disaster Medicine
Author:
Samuel J. Stratton, MD, MPH
Recent world attention has been drawn to a global Zika virus outbreak and an association in Brazil of microcephaly in newborn infants with the outbreak. The outbreak is being managed aggressively by local health authorities and world health organizations. Identification of the potential association of fetal exposure to Zika virus and risk of microcephaly has been a remarkable improvement in global health action when compared to the initial actions relative to the West Africa Ebola outbreak.
Download full publication:
- Details
In:
The New England Journal of Medicine
Authors:
Patrícia Brasil, M.D., Jose P. Pereira, Jr., M.D., Claudia Raja Gabaglia, M.D., Luana Damasceno, M.S., Mayumi Wakimoto, Ph.D., Rita M. Ribeiro Nogueira, M.D., Patrícia Carvalho de Sequeira, Ph.D., André Machado Siqueira, M.D., Liege M. Abreu de Carvalho, M.D., Denise Cotrim da Cunha, M.D., Guilherme A. Calvet, M.D., Elizabeth S. Neves, M.D., Maria E. Moreira, M.D., Ana E. Rodrigues Baião, M.D., Paulo R. Nassar de Carvalho, M.D., Carla Janzen, M.D., Stephanie G. Valderramos, M.D., James D. Cherry, M.D., Ana M. Bispo de Filippis, Ph.D., and Karin ielsen‑Saines, M.D.
Background
Zika virus (ZIKV) has been linked to neonatal microcephaly. To characterize the spectrum of ZIKV disease in pregnancy, we followed patients in Rio de Janeiro to describe clinical manifestations in mothers and repercussions of acute ZIKV infection in fetuses.
Download full publication:
- Details
In:
The New England Journal of Medicine
Authors:
Jernej Mlakar, M.D., Misa Korva, Ph.D., Nataša Tul, M.D., Ph.D., Mara Popović, M.D., Ph.D., Mateja Poljšak‑Prijatelj, Ph.D., Jerica Mraz, M.Sc., Marko Kolenc, M.Sc., Katarina Resman Rus, M.Sc., Tina Vesnaver Vipotnik, M.D., Vesna Fabjan Vodušek, M.D., Alenka Vizjak, Ph.D., Jože Pižem, M.D., Ph.D., Miroslav Petrovec, M.D., Ph.D., and Tatjana Avšič Županc, Ph.D.
Sumary
A widespread epidemic of Zika virus (ZIKV) infection was reported in 2015 in South and Central America and the Caribbean. A major concern associated with this infection is the apparent increased incidence of microcephaly in fetuses born to mothers infected with ZIKV. In this report, we describe the case of an expectant mother who had a febrile illness with rash at the end of the first trimester of pregnancy while she was living in Brazil. Ultrasonography performed at 29 weeks of gestation revealed microcephaly with calcifications in the fetal brain and placenta. After the mother requested termination of the pregnancy, a fetal autopsy was performed. Micrencephaly (an abnormally small brain) was observed, with almost complete agyria, hydrocephalus, and multifocal dystrophic calcifications in the cortex and subcortical white matter, with associated cortical displacement and mild focal inflammation. ZIKV was found in the fetal brain tissue on reversetranscriptase–polymerase-chain-reaction (RT-PCR) assay, with consistent findings on electron microscopy. The complete genome of ZIKV was recovered from the fetal brain.
Download full publication: