Viral metagenomics is increasingly being used for the identification of emerging and re-emerging viral pathogens in clinical samples with unknown etiology. The objective of this study was to shield light on the metavirome composition in clinical samples obtained from patients with clinical history compatible with an arboviral infection, but that presented inconclusive results when tested using RT-qPCR. The inconclusive amplification results might be an indication of the presence of an emerging arboviral agent that is inefficiently amplified by conventional PCR techniques. A total of eight serum samples with inconclusive amplification results for the routinely tested arboviruses—dengue (DENV), Zika (ZIKV), and Chikungunya (CHIKV) obtained during DENV and CHIKV outbreaks registered in the state of Alagoas, Northeast Brazil between July and August 2021—were submitted to metagenomic next-generation sequencing assay using NextSeq 2000 and bioinformatic pipeline for viral discovery. The performed bioinformatic analysis revealed the presence of two arboviruses: DENV type 2 (DENV-2) and CHIKV with a high genome coverage. Further, the metavirome of those samples revealed the presence of multiple commensal viruses apparently without clinical significance. The phylogenetic analysis demonstrated that the DENV-2 genome belonged to the Asian/American genotype and clustered with other Brazilian strains. The identified CHIKV genome was taxonomically assigned as ECSA genotype, which is circulating in Brazil. Together, our results reinforce the utility of metagenomics as a valuable tool for viral identification in samples with inconclusive arboviral amplification. Viral metagenomics is one of the most potent methods for the identification of emerging arboviruses.
Com base em dados da China, onde a pandemia se deu origem, a lesão cardíaca se tornou uma característica proeminente da doença, acometendo até 30% dos pacientes e auxiliando para 40% das mortes. Foram descritas diversas complicações cardiovasculares, como lesão miocárdica (20% dos casos), arritmias (16%), miocardite (10%), além de insuficiência cardíaca (IC) e choque (até 5% dos casos). O objetivo desse trabalho é informar e descrever sobre a nova miocardite ocasionada pelo novo vírus. E demonstrar a importância para novos estudos relacionados com a nova doença. Foram utilizadas todas as publicações que possuírem dados sobre a nova miocardite em pacientes com o novo SARS-CoV-2, publicações científicas, oficiais da Organização Mundial da Saúde e governamentais, dentre a determinada data (2019-2021). Foram encontrados aproximadamente 500 artigos, foram verificados os idiomas, e se realmente se tratava sobre o tema da nova miocardite relacionada ao novo vírus, então foram obtidos 39 artigos para a realização da discussão. A lesão do miocárdio, sinalizada por marcadores foi evidenciada já nos primeiros casos da doença. O Conselho Nacional de Saúde da China demonstrou em um relatório, 12% dos pacientes sem problemas cardiovasculares. Sendo assim, já que o SARS-CoV-1 e SARS-CoV-2 atinge as células através da enzima conversora de angiotensina 2, onde isso possivelmente acontece também em pacientes infectados com o novo vírus. Porém ainda são necessárias mais pesquisas para comprovação dessas possíveis teorias.
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