Time filter

Source Type

Rio de Janeiro, Brazil

Nogueira C.,Federal University of Rio de Janeiro | Borges F.,Federal University of Rio de Janeiro | Ramalho A.,Fundacao Instituto Oswaldo Cruz | Ramalho A.,Federal University of Rio de Janeiro
Revista Paulista de Pediatria | Year: 2010

Objective: To present a critical review about the oxidative stress in neonates, as well as the effect of antioxidant micronutrients in this group. Data sources: Bibliographic research in the databases Medline and Lilacs (1997-2009), selecting articles written in English, Spanish or Portuguese, with the descriptors: "neonate" and "micronutrients" combined with "antioxidants" and "oxidative stress". We examined 90 articles and 34 of them were selected. Data synthesis: The birth is an oxidative stress which is intensified in cases of prematurity and associated diseases. Oxidative injury suffered by the term neonate is offset by the maturation of effective antioxidant mechanisms, but in preterm infants, this does not accur, since a high concentrations of antioxidants is achieved only at the end of pregnancy. Several studies have been conducted in order to evaluate the concentration of antioxidants in mature and premature neonates and to propose effective supplementation against the oxidative stress. Conclusions: Oxidative stress is present in neonates, especially in preterm infants, increasing the demand for antioxidant nutrients. There is a consensus that they should be administered in order to avoid cellular damage. Lon-gitudinal studies with larger samples and measuring the concentrations of antioxidant micronutrients are needed in order to outline appropriate recommendations for their supplementation in term and preterm neonates. Source

Castro B.G.,Federal University of Mato Grosso | Souza M.M.S.,Federal Rural University of Rio de Janeiro | Regua-Mangia A.H.,Fundacao Instituto Oswaldo Cruz | Bittencourt A.J.,Federal Rural University of Rio de Janeiro
Transboundary and Emerging Diseases | Year: 2010

The current study evaluated the prevalence of enterobacterial agents on the external surface of the stable fly, Stomoxys calcitrans. In addition, this study investigated the presence of virulence genes of enterobacteria. Twenty different species were isolated and identified, Escherichia coli was the most frequent species isolated. The genes stx1, stx2 and/or eae for production of Shiga toxin were present in 13.04% of the E. coli samples. © 2010 Blackwell Verlag GmbH. Source

Moreno L.Z.,University of Sao Paulo | Paixao R.,University of Sao Paulo | Gobbi D.D.,University of Sao Paulo | Raimundo D.C.,University of Sao Paulo | And 4 more authors.
Research in Microbiology | Year: 2012

Atypical . Listeria innocua strains presenting phenotypic characteristics similar to those of . Listeria monocytogenes were recently isolated from food and the environment. These isolates also tested positive for virulence genes specific to . L. monocytogenes. Here we report the isolation of atypical hemolytic . L. innocua strains from the environment of pork processing plants in Brazil. The strains were positive for . L. monocytogenes virulence genes . hly, . inlA and . inlB by PCR and presented genotypic similarities with human isolates of . L. monocytogenes via the AFLP technique using . HindIII single enzyme protocol. Phenotypic and genotypic similarities suggest that these atypical . L. innocua may be pathogenic strains. © 2012 Institut Pasteur. Source

da Silva S.S.P.,Instituto Resgatando o Verde | Dias D.,Laboratorio Of Biologia E Parasitologia Of Mamiferos Silvestres Reservatorios | Martins M.A.,Federal Rural University of Rio de Janeiro | Guedes P.G.,Instituto Resgatando o Verde | And 8 more authors.
Mastozoologia Neotropical | Year: 2015

Whereas surveys of the bat fauna are available for some localities in the Brazilian Northeast, studies in the caatinga scrublands are still limited. The aim of this study was to survey the bat fauna in an area of caatinga scrublands in the Private Natural Heritage Reserve (RPPN Serra das Almas), which is located on the Ibiapaba Plateau, State of Ceará. The bat assemblage of the reserve was surveyed in July 2012 (rainy season), and January 2013 (dry season), with a total of 19 sampling nights. We captured 347 individuals of 23 species representing six families. The bat fauna was characterized by the predominance of a few abundant species, in particular phyllostomid frugivores, and many rare species, which is frequent in studies based on mist nets at ground level. The first records of Tonatia saurophila and Chiroderma vizottoi (recently described and known only from its type locality) are reported for the State of Ceará, where 66 bat species are now known to occur. © SAREM, 2015. Source

Cosgrove C.A.,St Georges, University of London | Chico M.E.,Laboratorio Of Biologia Molecular | Castello-Branco L.R.,Fundacao Ataulpho de Paiva | Castello-Branco L.R.,Fundacao Instituto Oswaldo Cruz | And 3 more authors.
Journal of Tropical Medicine | Year: 2012

Immune responses to oral vaccines are impaired in populations living in conditions of poverty in developing countries, and there is evidence that concurrent geohelminth infections may contribute to this effect. We vaccinated 48 children living in rural communities in Ecuador with a single oral dose of 100 mg of BCG Moreau RDJ and measured the frequencies of tuberculinstimulated peripheral blood mononuclear cells expressing IFN-γ before and after vaccination. Vaccinated children had active ascariasis (n = 20) or had been infected but received short- (n = 13) or long-term (n = 15) repeated treatments with albendazole prior to vaccination to treat ascariasis. All children had a BCG scar fromneonatal vaccination. There was no evidence of a boosting of postvaccination IFN-γ responses in any of the 3 study groups. Our data provide support for the presence of a barrier to oral vaccination among children from the rural tropics that appeared to be independent of concurrent ascariasis. Copyright © 2012 Maritza Vaca et al. Source

Discover hidden collaborations