Fonseca, Priscilla Duarte MarquesCorral, Marcelo AndreettaMeisel, Dirce Mary Correia LimaLevi, DeboraNascimento, Rafael CorreaBorges, William de CastroGryschek, Ronaldo Cesar BorgesCruz, Julia Maria CostaPaula, Fabiana Martins de2021-11-242021-11-242020FONSECA, P. D. M. et al. Immunoreactivity of proteins within 30-40 kDa range during the acute and the recovery phases in rats experimentally infected with Strongyloides venezuelensis. Revista do Instituto de Medicina Tropical de São Paulo, v. 62, p. e23, 2020. Disponível em: <https://www.scielo.br/j/rimtsp/a/cGfbQ3v6p8WFtMMGJFnxPSt/?lang=en>. Acesso em: 10 jun. 2021.1678-9946http://www.repositorio.ufop.br/jspui/handle/123456789/14030In experimental infection with Strongyloides venezuelensis, the acute and recovery phases can be distinguished, unlike human infections caused by Strongyloides stercoralis. The objective of this study was to evaluate the production of anti-Strongyloides IgG antibodies and the recognition of immunogenic protein bands during the acute and the recovery phases in rats experimentally infected with S. venezuelensis. Rats were infected subcutaneously with 400 or 4,000 S. venezuelensis infective larvae. The acute phase was characterized by elimination of a large number of eggs in the faeces on days 6-14 post infection; the recovery phase was characterized by the resolution of the infection between days 30 and 35 post infection. Differences in IgG levels were observed in the acute and the recovery phases. Different antigenic fractions were recognized in both phases of infection. It is concluded that proteins within the 30-40 kDa range are immunoreactive markers for both the acute and the recovery phases in rats experimentally infected with S. venezuelensis, particularly using membrane antigen.en-USabertoArtigo publicado em periodicoThis is an open-access article distributed under the terms of the Creative Commons Attribution License. Source: The article PDF.https://doi.org/10.1590/S1678-9946202062023