| Autor: |
Alfredo Bruno, Domenica de Mora, Byron Freire-Paspuel, Angel S. Rodriguez, Maria Belen Paredes-Espinosa, Maritza Olmedo, Martha Sanchez, Jennifer Romero, Michelle Paez, Manuel Gonzalez, Alberto Orlando, Miguel Angel Garcia-Bereguiain |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
International Journal of Infectious Diseases, Vol 109, Iss , Pp 315-320 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1201-9712 |
| DOI: |
10.1016/j.ijid.2021.06.038 |
| Popis: |
Background: The COVID-19 pandemic has caused significant supply shortages worldwide for SARS-CoV-2 molecular diagnosis, like RNA extraction kits. Objective: The aim of our study was to evaluate the clinical performance and analytical sensitivity of a simple SARS-CoV-2 diagnosis protocol based on heat shock without RNA extraction using both ''CDC'' (N gene) and ''Charite'' (E gene) RT-qPCR protocols. Results: 1,036 nasopharyngeal samples, 543 of them SARS-CoV-2 positive, were analyzed. The heat shock method correctly identified 68.8% (232/337) and 89.4% (202/226) of SARS-CoV-2 positive samples for N gene and E gene, respectively. Analytical sensitivity was assessed for heat shock method using the CDC RT-qPCR protocol, obtaining sensitivity values of 98.6%, 93.3% and 84.8% for limit of detection of 100.000, 50.000 and 20.000 viral RNA copies/mL of sample. Conclusions: Our findings show that a simple heat shock SARS-CoV-2 RT-qPCR diagnosis method without RNA extraction is a reliable alternative for potentially infectious SARS-CoV-2 positive patients at the time of testing. This affordable protocol can help overcome the cost and supply shortages for SARS-CoV-2 diagnosis, especially in developing countries. In Ecuador, it has been used already by laboratories in the public health system for more than 100.000 specimens. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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