Tropical medicine & international health : TM & IH · 2022
False positive serology of prepandemic chagasic samples with SARS-CoV-2 antigen.
СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
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Zuluaga Juan D H, Santos-Barbosa Juan C, Cuellar Adriana, Puerta Concepción J, Gonzalez John M
Аннотация
OBJECTIVE: To determine whether prepandemic sera from patients with Chagas disease recognise SARS-CoV-2 antigens.
MATERIALS AND METHODS: Forty sera from patients with Chagas disease were tested for the presence of IgG cross-reactivity against the nucleocapsid protein (NP) and spike (S) SARS-CoV-2 proteins by ELISA. Positive samples were tested again using a different ELISA and CLIA, both against NP.
RESULTS: None of the sera from patients with Chagas disease, previously confirmed as positive for the presence of anti-Trypanosoma cruzi antibodies reacted against the SARS-CoV-2 S protein, and six samples tested positive for the NP antigen (15%). The six positive samples were re-tested, five remained positive by ELISA and all were negative by CLIA.
CONCLUSION: According to our data, false-positive results might be a concern in the detection of SARS-CoV-2 antibodies in patients with Chagas disease.
MATERIALS AND METHODS: Forty sera from patients with Chagas disease were tested for the presence of IgG cross-reactivity against the nucleocapsid protein (NP) and spike (S) SARS-CoV-2 proteins by ELISA. Positive samples were tested again using a different ELISA and CLIA, both against NP.
RESULTS: None of the sera from patients with Chagas disease, previously confirmed as positive for the presence of anti-Trypanosoma cruzi antibodies reacted against the SARS-CoV-2 S protein, and six samples tested positive for the NP antigen (15%). The six positive samples were re-tested, five remained positive by ELISA and all were negative by CLIA.
CONCLUSION: According to our data, false-positive results might be a concern in the detection of SARS-CoV-2 antibodies in patients with Chagas disease.