LEWIS FLETCHER BUSS
Projetos de Pesquisa
Unidades Organizacionais
LIM/46 - Laboratório de Parasitologia Médica, Hospital das Clínicas, Faculdade de Medicina
2 resultados
Resultados de Busca
Agora exibindo 1 - 2 de 2
- Performance of at-home self-collected saliva and nasal-oropharyngeal swabs in the surveillance of COVID-19(2021) BRAZ-SILVA, Paulo H.; MAMANA, Ana C.; ROMANO, Camila M.; FELIX, Alvina C.; V, Anderson de Paula; FEREIRA, Noeli E.; BUSS, Lewis F.; TOZETTO-MENDOZA, Tania R.; V, Rafael A. Caixeta; LEAL, Fabio E.; GRESPAN, Regina M. Z.; BIZARIO, Joao C. S.; FERRAZ, Andrea B. C.; SAPKOTA, Dipak; GIANNECCHINI, Simone; TO, Kelvin K.; DOGLIO, Alain; MENDES-CORREA, Maria C.Background: SARS-CoV-2 quickly spreads in the worldwide population, imposing social restrictions to control the infection, being the massive testing another essential strategy to break the chain of transmission. Aim: To compare the performance of at-home self-collected samples - saliva and combined nasal-oropharyngeal swabs (NOP) - for SARS-CoV-2 detection in a telemedicine platform for COVID-19 surveillance. Material and methods: We analyzed 201 patients who met the criteria of suspected COVID-19. NOP sampling was combined (nostrils and oropharynx) and saliva collected using a cotton pad device. Detection of SARS-COV-2 was performed by using the Altona RealStar (R) SARS-CoV-2 RT-PCR Kit 1.0. Results: There was an overall significant agreement (kappa coefficient value of 0.58) between saliva and NOP. Considering results in either sample, 70 patients positive for SARS-CoV-2 were identified, with 52/70 being positive in NOP and 55/70 in saliva. This corresponds to sensitivities of 74.2% (95% CI; 63.7% to 83.1%) for NOP and 78.6% (95% CI; 67.6% to 86.6%) for saliva. Conclusion: Our data show the feasibility of using at-home self-collected samples (especially saliva), as an adequate alternative for SARS-CoV-2 detection. This new approach of testing can be useful to develop strategies for COVID-19 surveillance and for guiding public health decisions.
- Evolution and epidemic spread of SARS-CoV-2 in Brazil(2020) CANDIDO, Darlan S.; CLARO, Ingra M.; JESUS, Jaqueline G. de; SOUZA, William M.; MOREIRA, Filipe R. R.; DELLICOUR, Simon; MELLAN, Thomas A.; PLESSIS, Louis du; PEREIRA, Rafael H. M.; SALES, Flavia C. S.; MANULI, Erika R.; THEZE, Julien; ALMEIDA, Luiz; MENEZES, Mariane T.; VOLOCH, Carolina M.; FUMAGALLI, Marcilio J.; COLETTI, Thais M.; SILVA, Camila A. M.; RAMUNDO, Mariana S.; AMORIM, Mariene R.; HOELTGEBAUM, Henrique H.; MISHRA, Swapnil; GILL, Mandev S.; CARVALHO, Luiz M.; BUSS, Lewis F.; JR, Carlos A. Prete; ASHWORTH, Jordan; I, Helder Nakaya; PEIXOTO, Pedro S.; BRADY, Oliver J.; NICHOLLS, Samuel M.; TANURI, Amilcar; ROSSI, Atila D.; V, Carlos K. Braga; GERBER, Alexandra L.; GUIMARAES, Ana Paula de C.; JR, Nelson Gaburo; ALENCAR, Cecila Salete; FERREIRA, Alessandro C. S.; LIMA, Cristiano X.; LEVI, Jose Eduardo; GRANATO, Celso; FERREIRA, Giulia M.; JR, Ronaldo S. Francisco; GRANJA, Fabiana; GARCIA, Marcia T.; MORETTI, Maria Luiza; JR, Mauricio W. Perroud; CASTINEIRAS, Terezinha M. P. P.; LAZARI, Carolina S.; HILL, Sarah C.; SANTOS, Andreza Aruska de Souza; SIMEONI, Camila L.; FORATO, Julia; SPOSITO, Andrei C.; SCHREIBER, Angelica Z.; SANTOS, Magnun N. N.; SA, Camila Zolini de; SOUZA, Renan P.; RESENDE-MOREIRA, Luciana C.; TEIXEIRA, Mauro M.; HUBNER, Josy; LEME, Patricia A. F.; MOREIRA, Rennan G.; NOGUEIRA, Mauricio L.; FERGUSON, Neil M.; COSTA, Silvia F.; PROENCA-MODENA, Jose Luiz; VASCONCELOS, Ana Tereza R.; BHATT, Samir; LEMEY, Philippe; WU, Chieh-Hsi; RAMBAUT, Andrew; LOMAN, Nick J.; AGUIAR, Renato S.; PYBUS, Oliver G.; SABINO, Ester C.; FARIA, Nuno RodriguesBrazil currently has one of the fastest-growing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) epidemics in the world. Because of limited available data, assessments of the impact of nonpharmaceutical interventions (NPIs) on this virus spread remain challenging. Using a mobility-driven transmission model, we show that NPIs reduced the reproduction number from >3 to 1 to 1.6 in Sao Paulo and Rio de Janeiro. Sequencing of 427 new genomes and analysis of a geographically representative genomic dataset identified >100 international virus introductions in Brazil. We estimate that most (76%) of the Brazilian strains fell in three clades that were introduced from Europe between 22 February and 11 March 2020. During the early epidemic phase, we found that SARS-CoV-2 spread mostly locally and within state borders. After this period, despite sharp decreases in air travel, we estimated multiple exportations from large urban centers that coincided with a 25% increase in average traveled distances in national flights. This study sheds new light on the epidemic transmission and evolutionary trajectories of SARS-CoV-2 lineages in Brazil and provides evidence that current interventions remain insufficient to keep virus transmission under control in this country.