INTRODUCTION: Rodent-borne hantaviruses cause severe human diseases. We completed a serological survey of hantavirus infection in rural inhabitants of Turvo County, in the southern State of Santa Catarina, Brazil, in which seropositivity for hantavirus was correlated to previous disease in the participants. METHODS: The levels of IgG antibodies to hantavirus Araraquara in the sera of 257 individuals were determined using an immunoenzymatic assay. RESULTS: IgG antibodies to hantavirus were found in 2.3% of the participants. All seropositive participants reported previous disease with symptoms suggestive of hantavirus cardiopulmonary syndrome. CONCLUSIONS: Human infections causing unreported cardiopulmonary syndrome probably occur in the southern State of Santa Catarina.
Our results showed that hantavirus infections occurred in Cássia dos Coqueiros, completely unrecognized, even before hantaviruses were described in the Americas.
Infections by Hantavirus (Bunyaviridae) can cause severe human diseases, such as hemorrhagic fever with renal syndrome in Eurasia and cardiopulmonary syndrome in the Americas. These diseases are emergent and became a serious public health problem worldwide. Thus, rapid, sensitive and reliable methods for diagnosis of hantavirus infection are necessary in order to manage patients and control this rodent-borne virosis. Serological methods, such as neutralization tests, immunoblots and enzyme immunoassays using hantavirus-recombinant proteins as antigens, are discussed in this article, as well as new methods such as an immunochromatographic test. Hantavirus genome detection by different kinds of reverse transcription-PCR, including the real-time variant, is also discussed.
Parvoviruses (family Parvoviridae) are small, single-stranded DNA viruses. Many 30 parvoviral pathogens of medical, veterinary and ecological importance have been identified. In 31 this study, we used high-throughput sequencing (HTS) to investigate the diversity of parvoviruses 32 infecting wild and domestic animals in Brazil. We identified 21 parvovirus sequences (including 33 twelve nearly complete genomes and nine partial genomes) in samples derived from rodents, bats, 34 opossums, birds and cattle in Pernambuco, São Paulo, Paraná and Rio Grande do Sul states. These 35 sequences were investigated using phylogenetic and distance-based approaches, and were thereby 36 classified into eight parvovirus species (six of which have not been described previously), 37representing six distinct genera in the subfamily Parvovirinae. Our findings extend the known 38 biogeographic range of previously characterized parvovirus species, and the known host range of 39 three parvovirus genera (Dependovirus, Aveparvovirus, and Tetraparvovirus). Moreover, our 40 investigation provides a window into the ecological dynamics of parvovirus infections in 41 vertebrates, revealing that many parvovirus genera contain well-defined sub-lineages that 42 circulate widely throughout the world within particular taxonomic groups of hosts. 43
O processo de erosão costeira vem afetando de forma contínua as praias do município do Jaboatão dos Guararapes, município da Região Metropolitana do Recife – PE. A ocupação desordenada ao longo dos últimos 42 anos tem agravado o processo erosivo nas praias deste município. A prefeitura em parceria com o governo do estado implantou a técnica de engenharia costeira conhecida como transpasse de sedimentos, engorda da praia, para contenção da erosão, mas que vem apresentando retirada de sedimentos, mesmo após a engorda. Por esta razão este trabalho teve o objetivo de analisar a variabilidade multitemporal da linha de costa do município de Jaboatão dos Guararapes. O ano de 1974 foi utilizado como referência para a realização do cálculo da taxa de deslocamento da linha de costa para os anos de 1981, 1997, 2010, 2013 e 2016, realizado no programa Arcgis 10.1. A área de estudo foi dividida em 4 (quatro) setores de sul para o norte. Foi observada uma relevante retrogradação para o Setor 1 (praia de Barra de Jangada) entre 1974 e 1981, apresentando estabilização entre 1981 e 1997. Já no Setor 2 (praia de Candeias), houve progradação no período de 1974 a 2010. Em 2013 ocorreu uma grande progradação da linha de costa, devido a execução da técnica de transpasse de sedimentos, sendo o Setor 1 o que obteve maior deslocamento da linha em relação aos anos anteriores. Para o ano de 2015 ocorreu o processo inverso, ou seja, uma grande retrogradação em toda extensão do litoral de Jaboatão, principalmente na praia de Barra de Jangada (Setor 1). A linha de costa do ano 2016 apresentou um grande recuo, apresentando semelhança em diferentes trechos nos 4 setores em relação a linha do ano de 1997. Analysis of the Evolution of the Coastline of the Metropolitan Region Aouth of the City of Recife – PE, Brasil A B S T R A C TThe process of coastal erosion has been continuously affecting the Jaboatão dos Guararapes’s beaches, city of the Metropolitan Region of Recife - PE. The disorderly occupation over the last 42 years has aggravated the erosive process in the beaches of this city. The city government in partnership with the state government implemented the coastal engineering technique known as sediment transfer, fattening the beach to contain erosion, but which has been showing sediment removal, even after fattening. For this reason, this work aimed to analyze the multitemporal variability of the coastline of the city of Jaboatão dos Guararapes. The year 1974 was used as a reference for the calculation of the shoreline displacement rate for the years 1981, 1997, 2010, 2013 and 2016, performed in the program Arcgis 10.1. The study area was divided into 4 (four) sectors from south to north. A large retrogradation was observed for Sector 1 (Barra de Jangada beach) between 1974 and 1981, showing stabilization between 1981 and 1997. In Sector 2 (Candeias beach), there was progression from 1974 to 2010. In 2013 there was a great progradation of the shoreline, due to the execution of the sediment transfer technique, being Sector 1 the one that had the largest displacement of the line in relation to previous years. For 2015, the opposite process occurred, that is, a major retrogradation in the entire length of the Jaboatão coast, especially in Barra de Jangada beach (Sector 1). The shoreline of the year 2016 showed a large setback, showing similarity in different stretches in the 4 sectors compared to the 1997 line.Key words. Sediment transfer, shoreline, erosion, fattening.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.