2021
DOI: 10.1590/0037-8682-0047-2020
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Filter paper performance in PCR for cutaneous leishmaniasis diagnosis

Abstract: INTRODUCTION: The objective of this study was to evaluate the performance of filter paper (FP) for lesion scraping collection in a polymerase chain reaction (PCR) for cutaneous leishmaniasis (CL) diagnosis. METHODS: Lesion scrapings from 48 patients were collected and analyzed for PCR. RESULTS: PCR with FP detected up to three Leishmania braziliensis promastigotes. Considering the direct search by microscopy or PCR … Show more

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Cited by 2 publications
(3 citation statements)
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“…The obtained results can be explained by the fact that, in the FTA ELUTE CARDS ® , the DNA cannot be distributed in a uniform manner by the card in which the sample was fixed to the matrix (Cox et al, 2010), which can result in a false negative result. The samples fixed in cards have been described for the diagnosis of many diseases, including leishmaniosis, as an interesting alternative to obtain the DNA, facility in transport, in to the biological safety, since the fixed cells are completely lysed (Bankamp et al 2019;Ali et al,2020;Mota et al, 2020).…”
Section: Discussionmentioning
confidence: 99%
“…The obtained results can be explained by the fact that, in the FTA ELUTE CARDS ® , the DNA cannot be distributed in a uniform manner by the card in which the sample was fixed to the matrix (Cox et al, 2010), which can result in a false negative result. The samples fixed in cards have been described for the diagnosis of many diseases, including leishmaniosis, as an interesting alternative to obtain the DNA, facility in transport, in to the biological safety, since the fixed cells are completely lysed (Bankamp et al 2019;Ali et al,2020;Mota et al, 2020).…”
Section: Discussionmentioning
confidence: 99%
“…Quando consideramos o RPR como referência, os resultados falso positivos sugerem que pode não ter ainda transferência de anticorpos maternos ao feto, mas que a bactéria atravessou a barreira placentária. Já nos resultados falso negativos sugerem a transferência de anticorpos maternos, pois RN ainda não tem anticorpos próprios, mas que não houve transferência da bactéria, ou podem ser explicado por uma possível carga bacteriana baixa circulando no sangue, ou ainda pela não homogeneidade com que o DNA presente no sangue se espalha no cartão, assim algumas amostras só se mostraram positiva nas amostras de LCR (Michelow et al,2002;Castro et al,2016;Mota et al,2021) .…”
Section: Discussionunclassified
“…Não foram encontrados estudos com SFC para detecção do T.pallidum, mas um tipo de papel filtro o cartão de Guthrie (teste do pézinho) já é utilizado com sucesso na triagem neonatal de várias doenças e o cartão Whatman (FTA-elute ou Classic) já faz parte da detecção de outros agentes biológicos (Bankamp et al,2019;Ali et al,2020;Mota et al,2021).…”
Section: Discussionunclassified