Renata Freire Alves Pereira
Federal Fluminense University
Internal medicineGenotypeVirologyAntibodyMinimum inhibitory concentrationChemistryIn vitroImmunologyMinimum bactericidal concentrationMethicillin-resistant Staphylococcus aureusAnemiaStaphylococcus aureusErythema InfectiosumHuman parvovirusAntimicrobialBacteriaBiofilmMedicineMultilocus sequence typingBiologyMicrobiology
12Publications
5H-index
41Citations
Publications 12
Newest
#1Renata Freire Alves Pereira (Federal Fluminense University)H-Index: 5
#2Lialyz Soares Pereira Andre (Federal Fluminense University)H-Index: 2
Last. Fábio Aguiar-Alves (Federal Fluminense University)H-Index: 8
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Staphylococcus aureus is considered the most common opportunistic pathogen in humans, capable of forming biofilm, increasing the chances of antibiotic resistance and causes several chronic diseases. Biodiversity is a source of inspiration in the search for new agents against these microorganisms. Hitherto, the efficacy of Hypericum sp. extracts as an antibacterial agent has already been demonstrated against Gram-positive and Gram-negative bacteria. In this study, we observed that until 4 µg/mL, ...
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#1Thamiris Santana Machado (Federal Fluminense University)H-Index: 2
#2Felipe Ramos Pinheiro (Federal Fluminense University)H-Index: 1
Last. Fábio Aguiar-Alves (Federal Fluminense University)H-Index: 8
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Hospitalizations related to Methicillin-resistant Staphylococcus aureus (MRSA) are frequent, increasing mortality and health costs. In this way, this study aimed to compare the genotypic and phenotypic characteristics of MRSA isolates that colonize and infect patients seen at two hospitals in the city of Niteroi-Rio de Janeiro, Brazil. A total of 147 samples collected between March 2013 and December 2015 were phenotyped and genotyped to identify the protein A (SPA) gene, the mec staphylococcal c...
2 CitationsSource
#1Luiz C. S. Pinheiro (FIOCRUZ: Oswaldo Cruz Foundation)H-Index: 14
#2Lucas Villas Bôas Hoelz (FIOCRUZ: Oswaldo Cruz Foundation)H-Index: 9
Last. Fábio Aguiar-Alves (Federal Fluminense University)H-Index: 8
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Following the appearance of several antimicrobial agents to control the spread of infections, two major challenges have emerged: 1- the occurrence and blowout of multiresistant bacteria and the increase of chronic diseases, and 2- difficult-to-eradicate infections. In this study, we tested five benzoylthiourea derivatives for their ability to inhibit and stop bacterial growth and evaluated the possible influence of 1,2,4-triazolyl-benzoylthiourea derivative 4 on the formation and eradication of ...
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#1Maria de Fátima Nogueira de Freitas Alves (Federal Fluminense University)H-Index: 1
#2Bruno Penna (Federal Fluminense University)H-Index: 12
Last. Fábio Aguiar-Alves (Federal Fluminense University)H-Index: 8
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MRSA infection and colonization have been reported in both companion and food-chain animals, highlighting MRSA as an important veterinary and zoonotic pathogen. Another mec allele, the mecC gene, also confers beta-lactam resistance in Staphylococcus aureus and shows 69% nucleotide identity to mecA. The main aim of this study was to investigate the genotypic and clonal profile of methicillin-resistant S. aureus (MRSA) from cows with mastitis in dairy herds. Thirty-five samples suggestive of bovin...
2 CitationsSource
#1Egidio Domingos André Neto (Federal Fluminense University)H-Index: 1
#2Jaclyn Guerrero (University of California, Berkeley)H-Index: 1
Last. Fábio Aguiar-Alves (Federal Fluminense University)H-Index: 8
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Abstract Staphylococcus aureus nasal colonization is a major risk factor for infection. Studies have suggested an epidemiologic shift in the methicillin-resistant S. aureus (MRSA) strains that circulate in Brazil. We conducted cross-sectional studies of MRSA carriage among 1) children and adolescents in community daycare centers, 2) an outpatient clinic, and 3) hospitals in a large Brazilian metropolitan setting. There were 1.500 study subjects, 500 from each locale: 768 (51.2%) carried S. aureu...
1 CitationsSource
#1Stephanie Montechiari Pereira da Silva (Federal Fluminense University)
#2Thayssa da Silva Ferreira Fagundes (Federal Fluminense University)H-Index: 2
Last. Alessandra L. Valverde (Federal Fluminense University)H-Index: 8
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BACKGROUND Resistance to antimicrobial agents is a major public health problem, being Staphylococcus aureus prevalent in infections in hospital and community environments and, admittedly, related to biofilm formation in biotic and abiotic surfaces. Biofilms form a complex and structured community of microorganisms surrounded by an extracellular matrix adhered to each other and to a surface that gives them even more protection and resistance to the action of antimicrobial agents, as well as again...
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#1Egidio Domingos André Neto (Federal Fluminense University)H-Index: 1
#2Renata Freire Alves Pereira (Federal Fluminense University)H-Index: 5
Last. Fábio Aguiar-Alves (Federal Fluminense University)H-Index: 8
view all 7 authors...
CC398 is a livestock-associated Staphylococcus aureus. However, it has also been isolated from humans with no previous contact with livestock. A surveillance of methicillin-resistant S. aureus colonisation among children attending public day care centres and hospitals in Niteroi and Rio de Janeiro, Brazil, between 2011 and 2013, resulted in the isolation of six cases of CC398 from individuals with no previous exposure to livestock. These isolates showed a high frequency of the erm(C) gene (4/6, ...
5 CitationsSource
#1Rita de Cássia Nasser Cubel Garcia (Federal Fluminense University)H-Index: 8
#2Renata Freire Alves Pereira (Federal Fluminense University)H-Index: 5
Last. Solange Oliveira (Federal Fluminense University)H-Index: 30
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This study was conducted to provide information on the genetic diversity of human parvovirus B19 (B19V) circulating in the municipality of Niteroi, Rio de Janeiro, Southeast Brazil during 1996–2006, a period with two distinct outbreaks of B19V infection: 1999–2000 and 2004–2005. A total of 27 sera from patients with erythema infectiosum and five sera from HIV-infected patients that tested positive for B19V DNA during the study period were analyzed. To genotype B19V strains, a semi-nested PCR for...
10 CitationsSource
#1Renata Freire Alves Pereira (Federal Fluminense University)H-Index: 5
#2Rita de Cássia Nasser Cubel Garcia (Federal Fluminense University)H-Index: 8
Last. Solange Oliveira (Federal Fluminense University)H-Index: 30
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Immunocompromised patients may develop severe chronic anaemia when infected by human parvovirus B19 (B19V). However, this is not the case in human immunodeficiency virus (HIV)-infected patients with good adherence to highly active antiretroviral treatment (HAART). In this study, we investigated the clinical evolution of five HIV-infected patients receiving HAART who had B19V infections confirmed by serum polymerase chain reaction. Four of the patients were infected with genotype 1a strains and t...
11 CitationsSource