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Parasitol Int ; 84: 102394, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34044107

RESUMO

Toxoplasmosis is able to cause death and/or sequelae in foetuses from pregnant women and immunocompromised individuals. The early diagnosis, able to differentiate acute from chronic phases, is essential to define the treatment against this disease and minimize the risk of complications. Here we describe a peptide derived from microneme 8 (pMIC8) protein of Toxoplasma gondii, able to distinguish the phase of infection. By using human and mice serum samples with different infection times, we assessed the ability of pMIC8 to interact with antibodies present in early of infection, and compared the results obtained with soluble antigen of T. gondii (STAg). The results showed that pMIC8 was recognized more precisely with antibodies present in serum samples from individuals with time of infection below 3 months, followed by those between 4 and 6 months of infection. Based on these results, it is possible to conclude that the association of immunoassays using STAg and pMIC8 as antigen preparations can be used to distinguish acute from chronic infections.


Assuntos
Biomarcadores/sangue , Moléculas de Adesão Celular/sangue , Proteínas de Protozoários/sangue , Toxoplasma/fisiologia , Toxoplasmose/diagnóstico , Animais , Feminino , Humanos , Camundongos , Camundongos Endogâmicos BALB C , Peptídeos/química , Estudos Soroepidemiológicos , Testes Sorológicos , Toxoplasmose/parasitologia
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