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  • Surveillance of imported hospital requiring malaria in Portugal: can it be improved?: Table 1
    Publication . Fonseca, Ana Glória; Dias, Sara; Baptista, João Luís; Torgal, Jorge
    Although eradicated in Portugal, malaria keeps taking its toll on travellers and migrants from endemic countries. Completeness of hospital requiring malaria notification in Portugal 2000–11 was estimated, using two-source capture–recapture method. Data sources were: national surveillance database of notifiable diseases and the national database of the Diagnosis-Related Groups resulting from National Health Service (NHS) hospital episodes. The completeness of notification was 21,2% for all malaria cases and 26,5% for malaria deaths, indicating significant underreporting and urging for complementary data source in surveillance, for disease burden estimates and retrospective monitoring, namely hospital episodes statistics.
    2016-04-11Journal article Open access Show more
  • Monoids and pointed S-protomodular categories
    Publication . Bourn, Dominique; Martins-Ferreira, Nelson; Montoli, Andrea; Sobral, Manuela
    We investigate the notion of pointed S-protomodular category, with respect to a suitable class S of points, and we prove that these categories satisfy, relatively to the class S, many partial aspects of the properties of Mal’tsev and protomodular categories, like the split short five lemma for S-split exact sequences, or the fact that a reflexive S-relation is transitive. The main examples of S-protomodular categories are the category of monoids and, more generally, any category of monoids with operations, where the class S is the class of Schreier points.
    2016-04-11Journal article Open access Show more