Rosana I. Toro

The Lambda Variant in Argentina: Analyzing the Evolution and Spread of SARS-CoV-2 Lineage C.37

Mercedes Soledad Nabaes Jodar, Carolina Torres, Laura Noelia Mojsiejczuk, Dolores Acuña et autres

The second wave of COVID-19 occurred in South America in early 2021 and was mainly driven by Gamma and Lambda variants. In this study, we aimed to describe the emergence and local genomic diversity of the SARS-CoV-2 Lambda variant in Argentina, from …

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Omicron Waves in Argentina: Dynamics of SARS-CoV-2 Lineages BA.1, BA.2 and the Emerging BA.2.12.1 and BA.4/BA.5

Carolina Torres, Mercedes Nabaes Jodar, Dolores Acuña, Romina Zambrana Montaño et autres

The COVID-19 pandemic has lately been driven by Omicron. This work aimed to study the dynamics of SARS-CoV-2 Omicron lineages during the third and fourth waves of COVID-19 in Argentina. Molecular surveillance was performed on 3431 samples from Argentina, between EW44/2021 and …

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Immunogenicity and reactogenicity of heterologous immunization against SARS CoV-2 using Sputnik V, ChAdOx1-S, BBIBP-CorV, Ad5-nCoV, and mRNA-1273

Carla Antonela Pascuale, Augusto Varese, Diego Sebastian Ojeda, Marina Elisa Pasinovich et autres

Heterologous vaccination against coronavirus disease 2019 (COVID-19) provides a rational strategy to rapidly increase vaccination coverage in many regions of the world. Although data regarding messenger RNA (mRNA) and ChAdOx1 vaccine combinations are available, there is limited information about the combination of …

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Longitudinal Study after Sputnik V Vaccination Shows Durable SARS-CoV-2 Neutralizing Antibodies and Reduced Viral Variant Escape to Neutralization over Time

María Mora González López Ledesma, Lautaro Sánchez, Diego Sebastian Ojeda, Santiago Oviedo Rouco et autres

Vaccines have been produced in record time for SARS-CoV-2, offering the possibility of halting the global pandemic. However, inequalities in vaccine accessibility in different regions of the world create a need to increase international cooperation. Sputnik V is a recombinant adenovirus-based vaccine …

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Cost-Effective Method to Perform SARS-CoV-2 Variant Surveillance: Detection of Alpha, Gamma, Lambda, Delta, Epsilon, and Zeta in Argentina

Carolina Torres, Laura Noelia Mojsiejczuk, Dolores Acuña, Sofía Alexay et autres

SARS-CoV-2 variants with concerning characteristics have emerged since the end of 2020. Surveillance of SARS-CoV-2 variants was performed on a total of 4,851 samples from the capital city and 10 provinces of Argentina, during 51 epidemiological weeks (EWs) that covered the end …

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Longitudinal Study after Sputnik V Vaccination Shows Durable SARS-CoV-2 Neutralizing Antibodies and Reduced Viral Variant Escape over Time

María Mora González López Ledesma, Lautaro Sánchez, Diego Sebastian Ojeda, Santiago Oviedo Rouco et autres

ABSTRACT Recent studies have shown a temporal increase in the neutralizing antibody potency and breadth to SARS-CoV-2 variants in coronavirus disease 2019 (COVID-19) convalescent individuals. Here, we examined longitudinal antibody responses and viral neutralizing capacity to the B.1 lineage virus (Wuhan related), …

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La Universidad Pública y su rol en la pandemia COVID-19: laboratorios de diagnóstico al servicio de la red nacional de laboratorios de influenza y otros virus respiratorios

Rosana I. Toro, Juan Manuel Unzaga, G. Márquez, Alejandra Bosch et autres

La enfermedad por coronavirus 2019 (COVID-19) se informó por primera vez en Wuhan, China, el 31 de diciembre de 2019, declarándose emergencia de salud pública de importancia internacional en primera instancia y posteriormente elevada a la categoría de pandemia. Ante la grave …

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Pre-treatment drug resistance and HIV-1 subtypes in infants from Argentina with and without exposure to antiretroviral drugs for prevention of mother-to-child transmission

Paula C. Aulicino, Inés Zapiola, Silvia Kademián, María M Valle et autres

OBJECTIVES: To assess the prevalence and patterns of pre-treatment HIV drug resistance (PDR) and HIV-1 subtype in infants from Argentina with exposure to different antiretroviral drugs (ARVs) for the prevention of mother-to-child transmission (PMTCT). PATIENTS AND METHODS: HIV-1 genotyping was performed in …

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Centros de asesoramiento, prevención y diagnóstico de infecciones de transmisión sexual...iguales pero diferentes

Carina Tersigni, Laura Delaplace, Rosana I. Toro, Jimena Quintana Corvalan et autres

La forma en que las sociedades afrontan las enfermedades y epidemias puede revelar tensiones sociales que existen en ellas. La epidemia de VIH/SIDA y en general las infecciones de transmisión sexual (ITS) no escapan a esta regla general, ya que con la …

Evaluacion externa de calidad en hematologia : hemoglobina ( periodo 1989-1991 )

Rosana I. Toro, C. Gonzalvo Diaz, Nilda E. Fink, I Crispiani et autres

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