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Herein, we notice the expression of a recombinant antigen, rTgOWP1-f, derived from a fragment selected on basis of its structural homology with <jats:italic>Plasmodium<\/jats:italic> MSP1\u201319. Rabbit polyclonal antibodies anti-rTgOWP1-f evidence ability for specific identification of environmental <jats:italic>T. gondii<\/jats:italic> oocysts. We assume, rTgOWP1-f, as a possible biomarker of oocysts. In addition, we present findings supporting this vision, including the development of an immunodetection method for <jats:italic>T. gondii<\/jats:italic> oocysts identification.<\/jats:p>","DOI":"10.1038\/s41598-020-64590-4","type":"journal-article","created":{"date-parts":[[2020,5,14]],"date-time":"2020-05-14T10:03:18Z","timestamp":1589450598000},"update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["rTgOWP1-f, a specific biomarker for Toxoplasma gondii oocysts"],"prefix":"10.1038","volume":"10","author":[{"given":"Susana","family":"Sousa","sequence":"first","affiliation":[]},{"given":"Andr\u00e9","family":"Almeida","sequence":"additional","affiliation":[]},{"given":"Lurdes","family":"Delgado","sequence":"additional","affiliation":[]},{"given":"Ant\u00f3nia","family":"Concei\u00e7\u00e3o","sequence":"additional","affiliation":[]},{"given":"Cl\u00e1udia","family":"Marques","sequence":"additional","affiliation":[]},{"given":"Jos\u00e9 Manuel Correia","family":"da Costa","sequence":"additional","affiliation":[]},{"given":"Ant\u00f3nio","family":"Castro","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2020,5,14]]},"reference":[{"key":"64590_CR1","unstructured":"Dubey, J.P. & Beattie, C. 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