Publications by authors named "Marisa de Oliveira Ribeiro"
Retrospective epidemiologic and genomic surveillance of arboviruses in 2023 in Brazil reveals high co-circulation of chikungunya and dengue viruses.
BMC Med
November 2024
Background: The rapid spread and increase of chikungunya (CHIKV) and dengue (DENV) cases in Brazilian regions in 2023 has raised concerns about the impact of arboviruses on public health. Epidemiological and genomic surveillance was performed to estimate the introduction and spread of CHIKV and DENV in Brazil.
Methods: This study obtained results from the Hermes Pardini (HP), a private medical laboratory, and the Health Department of Minas Gerais state (SES-MG).
Retrospective Analysis of Omicron in Minas Gerais, Brazil: Emergence, Dissemination, and Diversification.
Microorganisms
August 2024
Article Synopsis
- - Brazil experienced significant COVID-19 impact, highlighted by high death tolls and four main peaks of cases, with the last two waves driven by the emergence of the Omicron variant and its sublineages BA.1, BA.2, BA.4, and BA.5.
- - A study analyzed virus samples from 15 health units in Minas Gerais, revealing that BA.1 and BA.2 were most common in the third wave, while BA.4 and BA.5 dominated the fourth.
- - Findings indicate that vaccination, especially booster doses, played a crucial role in reducing deaths, and the study confirmed the introduction of Omicron subvariants through multiple international cases with continued local transmission.
Since 2014, Brazil has experienced an unprecedented epidemic caused by chikungunya virus (CHIKV), with several waves of East-Central-South-African (ECSA) lineage transmission reported across the country. In 2018, Rio de Janeiro state, the third most populous state in Brazil, reported 41% of all chikungunya cases in the country. Here we use evolutionary and epidemiological analysis to estimate the timescale of CHIKV-ECSA-American lineage and its epidemiological patterns in Rio de Janeiro.
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