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Home / Archives for Figueiredo J

Duffy negative antigen is no longer a barrier to Plasmodium vivax–molecular evidences from the African West Coast (Angola and Equatorial Guinea)

  • Autores: Arez AP, Benito A, Berzosa P, Cano J, de Sousa B, Dias F, Do Rosário VE, Figueiredo J, Mendes C, Mora VG
  • Journal: Plos Neglected Tropical Diseases
  • Link: http://www.ncbi.nlm.nih.gov/pubmed/?term=Duffy+negative+antigen+is+no+longer+a+barrier+to+Plasmodium+vivax+%E2%80%93+molecular+evidences+from+the+African+west+coast+(Angola+and+Equatorial+Guinea).

Plasmodium vivax shows a small prevalence in West and Central Africa due to the high prevalence of Duffy negative people. However, Duffy negative individuals infected with P. vivax have been reported in areas of high prevalence of Duffy positive people who may serve as supply of P. vivax strains able to invade Duffy negative erythrocytes. We investigated the presence of P. vivax in two West African countries, using blood samples and mosquitoes collected during two on-going studies.
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Schistosomiasis and Acute Appendicitis

  • Autores: Belo S, Clemente H, Costa S, Figueiredo J, Grácio MA, Lourenco A, Santos A
  • Ano de Publicação: 2014
  • Journal: Acta Médica Portuguesa
  • Link: http://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/5150

Acute appendicitis associated to Schistosoma haematobium and S. mansoni infection has been found in patients submitted to urgent appendectomy at the Hospital Américo Boavida in Luanda. Due to the high prevalence and morbidity caused by schistosomiasis (or bilharziasis) in the country, we suspect that the involvement of Schistosoma infection on appendicular pathology could be very frequent, in particular for those individuals more exposed to the parasite transmission.
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Prostate adenocarcinoma associated with prostatic infection due to Schistosoma haematobium. Case report and systematic review

  • Autores: Balaca M, Belo S, Costa A, Figueiredo J, Grácio MA, Nilo B, Richter J
  • Ano de Publicação: 2014
  • Journal: Journal Parasitology Research
  • Link: http://link.springer.com/article/10.1007%2Fs00436-014-4250-9

We describe the first case of a prostate adenocarcinoma associated with prostatic Schistosoma haematobium infection occurring in Angola. Prostate carcinoma was suspected because of high levels of prostate-specific antigen. This observation prompted us to review the literature on schistosomiaisis with respect to genital pathology and prostate cancer.
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About GHTM

GHTM is a R&D Center that brings together researchers from IHMT 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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