Aldeia, CláudiaCorreia, HelenaSilva, Susana PereiraFaria, Ana PaulaBotelho, MónicaBaptista Fernandes, TeresaMoutinho, Maria GuilherminaSantos Costa, QuirinaSantos Gomes, GabrielaJúlio, Cláudia2022-01-192022-01-192021-10http://hdl.handle.net/10400.18/7861PNAEQ’s Parasitic Morphology of the National Health Institute Doutor Ricardo Jorge runs three External Quality Assessment (EQA) surveys per year, for microscopy-based detection of parasites. Human-infecting trematode, Schistosoma mansoni, widely occurs in geographical regions across sub-Saharan Africa, South American countries, the Caribbean and the Middle East. In order to mimic patient-like samples, S.mansoni extracted eggs from mice liver, were used to spike-in negative human faeces. Aims: Prepare negative stool specimens spiked with S. mansoni eggs for EQA testing; Evaluate the spiked sample homogeneity and stability; Assess the performance of participant laboratories.engExternal Quality AssessmentEQAParasitic MorphologySchistosoma mansoniAvaliação Externa da QualidadeAEQPrograma Nacional de Avaliação Externa da QualidadePNAEQconference object