RESUMO

Infectious diseases emerge and reemerge over the years, and many of them can cause neurologic disease. Several factors contribute to the emergence and reemergence of these conditions, including human population growth, an increase in international travel, the geographic expansion of recognized pathogens to areas where they were previously nonendemic, and greater contact with wild animal reservoirs. The antivaccination social movement has played an important role in the reemergence of infectious diseases, especially some viral conditions. The authors review different viral (arboviruses such as dengue, chikungunya, and Zika virus; enterovirus 71; measles; and influenza), bacterial (syphilis, Lyme disease, and listeriosis), and parasitic (Chagas disease) diseases, focusing primarily on their neurologic complications. Although there are several additional infectious diseases with central nervous system manifestations that could be classified as emergent or reemergent, those listed here are the most relevant from an epidemiologic standpoint and are representative of important public health issues on all continents. The infections caused by these pathogens often show a variety of neuroimaging patterns that can be identified at CT and MRI, and radiology is central to the diagnosis and follow-up of such conditions. Given the increasing relevance of emerging and reemerging infections in clinical practice and public health scenarios, radiologists should be familiar with these infections. Online supplemental material is available for this article. ©RSNA, 2019.

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RESUMO

Objetivo: Revisar a capacidade da contagem dos folículos antrais de predizer resultados nos ciclos de fertilização in vitro. Método: Foi feita revisão sistemática de trabalhos publicados nos últimos 13 anos que tiveram como objetivo determinar a capacidade da contagem dos folículos antrais de predizer resultados nos ciclos de fertilização in vitro. Esses estudos estavam disponíveis nas bases de dados científicas Medline, Lilacs e Scielo. Os descritores de busca foram contagem de folículos antrais, reserva ovariana e fertilização in vitro. Resultados: Verificou-se a existência de 975 artigos publicados. Foram selecionados 16 deles publicados de 2000 a 2013 que mostraram a importância de a contagem dos folículos antrais predizer resultados nos ciclos de fertilização in vitro em pacientes em idade fértil, sem história prévia de cirurgia ovariana, não fumantes e submetidas ao primeiro ciclo de fertilização in vitro. Conclusão: Grande parte dos estudos mostrou que a contagem de poucos folículos antrais está associada com a ocorrência de má resposta ovariana e maior chance de cancelamento dos ciclos de fertilização in vitro, assim como com uma baixa quantidade de oócitos aspirados. Ainda não há um método ideal para predizer gravidez de forma confiável.

Objective: To review the ability of the antral follicle count in the prediction of in vitro fertilization cycles outcomes. Method: A systematic review of studies published in the last 13 years that aimed to determine the ability of the antral follicle count to predict outcome in IVF cycles was done. These studies were available in the scientific databases MEDLINE, LILACS and Scielo. The keywords were the antral follicle count, ovarian reserve and in vitro fertilization. Results: During the search it was found that there were 975 published articles. We selected 16 articles published between the years of 2000 to 2013 that showed the importance of the antral follicle count to predict in vitro fertilization cycles outcomes in patients of childbearing age, with no history of ovarian surgery, non-smokers and undergoing the first in vitro fertilization cycle. Conclusion: Most studies show that few antral follicle counts is associated with the occurrence of poor ovarian response and greater chance of canceling cycles of in vitro fertilization cycles, as well as a low amount of collected oocytes. There is still no ideal method for predicting pregnancy reliably.

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