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Home / Archives for Parreira R

The Culex pipiens complex in continental Portugal: distribution and genetic structure.

  • Authors: Almeida AP, Donnelly MJ, Gomes B, Novo MT, Parreira R, Sousa CA, Pinto J
  • Journal: Journal of the American Mosquito Control Association
  • Link: http://www.ncbi.nlm.nih.gov/pubmed/?term=The+Culex+pipiens+complex+in+continental+Portugal%3A+Distribution+and+genetic+structure.

Portugal is a southern European country that displays favorable ecological conditions for the establishment of West Nile virus (WNV) transmission cycles. Competent mosquito vector species are present throughout the country.
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A new genotype 2 subcluster identified among GBV-C strains circulating in the Lisbon metropolitan area of Portugal

  • Authors: Branco C, Esteves A, Parreira R, Piedade J
  • Journal: Journal of Medical Virology
  • Link: http://www.ncbi.nlm.nih.gov/pubmed/?term=A+new+genotype+2+subcluster+identified+among+GBV-C+strains+circulating+in+the+Lisbon+metropolitan+area+of+Portugal.

The rate of infection by the GBV-C virus was investigated in a group of 214 individuals at high risk of infection with parenterally transmitted viruses, and all living in the Lisbon metropolitan area (Portugal). RNA was extracted from plasma samples, and a fragment of the 5′-UTR was amplified by RT-PCR, disclosing a high prevalence of infection (40.7%).
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A divergent insect-specific flavivirus that causes overt cytopathic effect in a mosquito cell-line

  • Authors: Almeida AP, Alves de Matos AP, Duque Ferreira D, Esteves A, Lopes A, Parreira R, Piedade J
  • Publication Year: 2013
  • Journal: Microscopy and Microanalysis
  • Link: http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8964978&fileId=S1431927613001049

This work reports the initial characterization, including near full-length sequence analysis, of an ISF which seems to form a divergent lineage within the ISF radiation, as indicated by phylogenetic analysis based on ac multiple sequence alignment of the NS5 flavivirus coding sequence.
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Molecular characterization of the first record of Lymnaea natalensis Krauss 1848 (Mollusca, Pulmonata, Lymnaeidae) on Madeira Island.

  • Authors: Afonso A, Belo S, Brehm A, Calado M, Ferreira CC, Ferreira PM, Grácio MA, Maurício I, Parreira R
  • Journal: Tropical Medicine & International Health
  • Link: https://apps.webofknowledge.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=31&SID=Y2ytOr2frNCuRlReLtM&page=1&doc=1

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GB virus C (GBV-C) evolutionary patterns revealed by analyses of reference genomes, E2 and NS5B sequences amplified from viral strains circulating in the Lisbon area (Portugal).

  • Authors: Branco C, Esteves A, Parreira R, Piedade J
  • Journal: Infection Genetics and Evolution
  • Link: http://www.ncbi.nlm.nih.gov/pubmed/?term=GB+virus+C+(GBV-C)+evolutionary+patterns+revealed+by+analyses+of+reference+genomes%2C+E2+and+NS5B+sequences+amplified+from+viral+strains+circulating+in+the+Lisbon+area+(Portugal)

GBV-C is a non-pathogenic virus that is largely dispersed in different human populations. The phylogenetic analysis of the 5′-untranslated region (5’UTR) of the GBV-C genome has led to the segregation of viral strains into six genotypes, but incongruent results are frequently obtained depending on the genome region analyzed. In this report, different phylogenetic approaches and multivariate statistics were combined to disclose evolutionary patterns that contribute to shape GBV-C evolution.
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About GHTM

GHTM is a R&D Unit that brings together researchers with a track record in Tropical Medicine and International & Global Health. It aims at strengthening Portugal's role as a leading partner in the development and implementation of a global health research agenda. Our evidence-based interventions contribute to the promotion of equity in health and to improve the health of populations.

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