Existem diversas técnicas para a detecção quantitativa e qualitativa do SARS-CoV-2. Entre essas diferentes metodologias, qual é dita como o padrão-ouro para o diagnóstico da covid-19?A. Quimioluminescência.B. Imunocromatografia.C. RT-PCR.

Cada metodologia de detecção de SARS-CoV-2 ou sorológica tem uma janela de tempo ideal para realizar o teste, tendo em vista resultados mais fidedignos. O teste rápido para a detecção de antígeno deve, idealmente, ser realizado em que período após o início dos sintomas?A. Do segundo ao décimo dia.B. Nos primeiros 15 dias. C. Após 30 dias de infecção.

Existem diferentes metodologias para a detecção de SARS-CoV-2, bem como indicações distintas para cada técnica. Qual é a principal diferença entre as técnicas de RT-PCR e sorológicas? A. O RT-PCR detecta o antígeno do vírus, enquanto as técnicas sorológicas detectam RNA.B. O RT-PCR quantifica os anticorpos do vírus, enquanto as técnicas sorológicas detectam RNA.C. O RT-PCR detecta o material genético do vírus, enquanto as técnicas sorológicas detectam os anticorpos.

SARS-CoV-2 is the etiological agent of COVID-19. Most of SARS-CoV-2 carriers are assumed to exhibit no or mild non-specific symptoms. Thus, they may contribute to the rapid and mostly silent circulation of the virus among humans. Since SARS-CoV-2 can be detected in stool samples it has recently been proposed to monitor SARS-CoV-2 in wastewaters (WW) as a complementary tool to investigate virus circulation in human populations. In the present work we assumed that the quantification of SARS-CoV-2 genomes in wastewaters should correlate with the number of symptomatic or non-symptomatic carriers. To test this hypothesis, we performed a time-course quantitative analysis of SARS-CoV-2 by RT-qPCR in raw wastewater samples collected from several major wastewater treatment plant (WWTP) of the Parisian area. The study was conducted from 5 March to 23 April 2020, therefore including the lockdown period in France (since 17 March 2020). We confirmed that the increase of genome units in raw wastewaters accurately followed the increase of human COVID-19 cases observed at the regional level. Of note, the viral genomes could be detected before the beginning of the exponential growth of the epidemic. As importantly, a marked decrease in the quantities of genomes units was observed concomitantly with the reduction in the number of new COVID-19 cases which was an expected consequence of the lockdown. A s a conclusion, this work suggests that a quantitative monitoring of SARS-CoV-2 genomes in wastewaters should bring important and additional information for an improved survey of SARS-CoV-2 circulation at the local or regional scale.list the conclusions

Diagnosic tests for COVID-19 include:Multiple select question.immunological tests measuring either antigens or antibodies.culturing SARS-CoV-2 from blood samples.nucleic acid amplification tests such as RT-PCR.Gram staining.

Methods to prevent the spread of SARS-CoV-2 are:Multiple select question.vaccination.covering the nose and mouth with a mask.wearing gloves when touching communal surfaces.social distancing.proper cooking of meats.filtering water before drinking.