Revue: | Memorias do Instituto Oswaldo Cruz |
Base de datos: | PERIÓDICA |
Número de sistema: | 000452403 |
ISSN: | 0074-0276 |
Autores: | Almeida, Letícia Trindade1 Gonçalves, Amanda Bonoto1 Franco Luiz, Ana Paula Moreira1 Silva, Thais Bárbara de Souza1 Alves, Pedro Augusto1 Monte-Neto, Rubens Lima do1 |
Instituciones: | 1Fundacao Oswaldo Cruz, Instituto Rene Rachou, Belo Horizonte, Minas Gerais. Brasil |
Año: | 2022 |
Volumen: | 117 |
País: | Brasil |
Idioma: | Inglés |
Tipo de documento: | Artículo |
Enfoque: | Experimental, aplicado |
Resumen en inglés | BACKGROUND Severe acute respiratory syndrome coronavirus (SARS-CoV-2) omicron variant was first detected in South Africa in November 2021. Since then, the number of cases due to this variant increases enormously every day in different parts of the world. Mutations within omicron genome may impair the molecular detection resulting in false negative results during Coronavirus disease 19 (COVID-19) diagnosis. OBJECTIVES To verify if colorimetric reverse transcription loop-mediated isothermal amplification (RT-LAMP) targeting N and E genes would work efficiently to detect omicron SARS-CoV-2 variant and its sub-lineages. METHODS SARS-CoV-2 reverse transcription quantitative polymerase chain reaction (RT-qPCR) positive samples were sequenced by next generation DNA sequencing. The consensus sequences generated were submitted to Pangolin tool for SARS-CoV-2 lineage identification. RT-LAMP reactions were performed at 65ºC/30 min targeting N and E. FINDINGS SARS-CoV-2 omicron can be detected by RT-LAMP targeting N and E genes despite the genomic mutation of this more transmissible lineage. Omicron SARS-CoV-2 sub-lineages were tested and efficiently detected by RT-LAMP. We demonstrated that this test is very sensitive in detecting omicron variant, with LoD as low as 0.4 copies/µL. MAIN CONCLUSIONS Molecular detection of omicron SARS-CoV-2 variant and its sub-lineages can be achieved by RT-LAMP despite the genomic mutations as a very sensitive surveillance tool for COVID-19 molecular diagnosis |
Disciplinas: | Medicina |
Palabras clave: | Virus, Genética, Diagnóstico, SARS-CoV-2, Mutaciones genómicas, Variante omicrón, Diagnóstico molecular |
Keyword: | Virus, Genetics, Diagnosis, SARS-CoV-2, Genomic mutations, Omicron variant, Molecular diagnosis |
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