scholarly journals Seroprevalence of anti-SARS-COV-2 antibodies in blood donors from Nuevo Leon state, Mexico, during the beginning of the COVID-19 pandemic

2020 ◽  
Author(s):  
Natalia Martinez-Acuña ◽  
Diana Avalos-Nolazco ◽  
Diana Rodriguez-Rodriguez ◽  
Cynthia Martinez-Liu ◽  
Rogelio Cazares Taméz ◽  
...  
Keyword(s):  
Blood Donors ◽  
Asymptomatic Infection ◽  
Population Exposure ◽  
Nuevo Leon ◽  
Epidemic Curve ◽  
Nuevo León ◽  
Chemiluminescent Immunoassay ◽  
Asymptomatic Case ◽  
Hiv 1 ◽  
Potential Tool

SummaryBackgroundThe progression and distribution of SARS-CoV-2 is unknown because typically only symptomatic individuals are diagnosed.AimWe evaluated the seroprevalence of anti-SARS-CoV-2 in blood donors in Nuevo Leon, Mexico as a strategy for asymptomatic case detection of COVID-19 and epidemic progression.Methods/MaterialsWe tested 1968 blood donors that attended two regional donation centers in Northeast Mexico from January 1st to August 30, 2020, to identify anti-SARS-CoV-2 IgG by chemiluminescent immunoassay. Additionally, routine tests for donors including Brucella, Chagas, HCV, VDRL, HIV-1, and HBsAg identification were performed.ResultsWe found 77 donors reactive for anti-SARS-CoV-2 IgG (seroprevalence 3.99%) and none of them had reported recent COVID-19 symptoms. Donors aged 18 to 49 years (89.5%) were more likely to be seropositive compared to those aged 50 years or older (10.5%) (P<0.001). Prevalence of antibodies increased each epidemiological (EPI) week, parallel to the report of confirmed cases by RT-PCR, identifying the highest prevalence between EPI week 33 and 35 (10.2% to 19%). The metropolitan area of Monterrey recorded the highest number of cases. Routine tests showed that the prevalence of anti-Brucella was 0.13%, anti-HCV 0.5%, anti-HIV-1-2 0.14%, HBsAg 0.16%, Chagas 0.48% and syphilis 1.06%.ConclusionsThere is a growing trend of seroprevalence over time, parallel to the constantly increasing epidemic curve in our region and it was higher under 49 years of age associated with asymptomatic infection in donors from the Nuevo Leon area. Detection of anti-SARS-CoV-2 in blood donors is a potential tool for tracking the progression and identifying population exposure during the SARS-CoV-2 outbreak.

scholarly journals Seroprevalence of Anti-SARS-CoV-2 Antibodies in Blood Donors from Nuevo Leon State, Mexico, during 2020: A Retrospective Cross-Sectional Evaluation

Viruses ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1225
Author(s):  
Natalia Martinez-Acuña ◽  
Diana Minerva Avalos-Nolazco ◽  
Diana Raquel Rodriguez-Rodriguez ◽  
Cynthia Gabriela Martinez-Liu ◽  
Kame Alberto Galan-Huerta ◽  
...  
Keyword(s):  
Blood Donors ◽  
Asymptomatic Infection ◽  
Epidemiological Surveillance ◽  
Plasma Samples ◽  
Cross Sectional ◽  
Nuevo Leon ◽  
Nuevo León ◽  
Asymptomatic Case ◽  
Abbott Architect ◽  
Over Time

The progression and distribution of the SARS-CoV-2 pandemic are continuously changing over time and can be traced by blood donors’ serological survey. Here, we investigated the seroprevalence of anti-SARS-CoV-2 antibodies in blood donors in Nuevo Leon, Mexico during 2020 as a strategy for the rapid evaluation of the spread of SARS-CoV-2 and asymptomatic case detection. We collected residual plasma samples from blood donors who attended two regional donation centers from January to December of 2020 to identify changes in anti-SARS-CoV-2 IgG prevalence. Plasma samples were analyzed on the Abbott Architect instrument using the commercial Abbott SARS-CoV-2 IgG chemiluminescent assay. We found a total of 99 reactive samples from 2068 analyzed plasma samples, resulting in a raw prevalence of 4.87%. Donors aged 18–49 years were more likely to be seropositive compared to those aged >50 years (p < 0.001). Weekly seroprevalence increased from 1.8% during the early pandemic stage to 27.59% by the end of the year. Prevalence was 1.46-fold higher in females compared to males. Case geographical mapping showed that Monterrey city recorded the majority of SARS-CoV-2 cases. These results show that there is a growing trend of seroprevalence over time associated with asymptomatic infection that is unnoticed under the current epidemiological surveillance protocols.

Autoantibodies to Phospholipids and to the Coagulation Proteins in AIDS

1997 ◽  
Vol 77 (05) ◽  
pp. 0856-0861 ◽  
Author(s):  
N Abuaf ◽  
S Laperche ◽  
B Rajoely ◽  
R Carsique ◽  
A Deschamps ◽  
...  
Keyword(s):  
Lupus Erythematosus ◽  
Antiphospholipid Antibodies ◽  
Blood Donors ◽  
Heterogeneous Mixture ◽  
Systemic Lupus ◽  
Hematological Disorders ◽  
False Positive Test ◽  
Glycoprotein I ◽  
Coagulation Proteins ◽  
Hiv 1

SummaryIn HIV-1 infection, an increased prevalence of anticardiolipin autoantibodies (aCL) and lupus anticoagulant (LA) has been described. In order to see if these antibodies are isolated or, like in autoimmune diseases, associated with hematological disorders and with antibodies to other phospholipids and to proteins of coagulation, we investigated 3 groups of patients: 1. 342 HIV-1 infected patients, 2. 145 control patients including 61 systemic lupus erythematosus (SLE) patients, 58 patients with a connective tissue disease, 15 patients with stroke, 11 patients with syphilis and 3.100 blood donors. In HIV-1 infection antiprothrombin (aPrT) antibodies were present in 25% of patients, the prevalence of antiphosphatidylcholine antibodies (aPC) (50%) was almost as high as aCL (64%), and 39% had both antibodies. Absorption on liposomes of the latter revealed an heterogeneous mixture of aCL and aPC or cross-reacting antibodies. In contrast with SLE, anti-β2-glycoprotein I (4%), LA (1%), biological false positive test for syphilis (0.3%), thrombosis (p <0.001) were uncommon. In HIV-1 infection, antiphospholipid antibodies do not associate with features linked to them in SLE or syphilis.

El estilo de aprendizaje y su relación con el desempeño académico en estudiantes de arquitectura de la Universidad Autónoma de Nuevo León

2003 ◽  
Vol 3 (2) ◽  
pp. 123-134
Author(s):  
Irma Cantú
Keyword(s):  
Nuevo Leon ◽  
Nuevo León

El estudio tuvo el propósito de conocer la relación que existe entre el estilo de aprendizaje predominante del alumno de arquitectura —así como las subcategorías presentadas por Alonso, Gallegos y Honey (estilo activo, estilo reflexivo, estilo teórico y estilo pragmático)— y su desempeño académico, en función de la importancia que, desde el punto de vista pedagógico, sus resultados podrían tener para redefinir los enfoques didácticos en áreas del conocimiento con las características teórico-prácticas como las de la arquitectura y el diseño. Se trata de un estudio cuantitativo, descriptivo y correlacional, que utiliza una muestra probabilística estratificada de 288 sujetos. El instrumento utilizado fue el Inventario de Estilos de Aprendizaje, de Honey-Alonso. Se utilizó la prueba de dependencia P2 (Ji cuadrado), para estudiar la relación entre el estilo de aprendizaje predominante del alumno y su desempeño académico y el coeficiente de correlación r de Pearson para el estudio de cada una de las subcategorías de los estilos de aprendizaje del alumno y su relación con su desempeño académico. Los resultados obtenidos demostraron que el desempeño académico de los estudiantes expresado por el rendimiento, es influido, para algunos positivamente y para otros negativamente, por el estilo de aprendizaje; se concluye en términos generales que existe una correlación significativa entre el desempeño académico y el estilo de aprendizaje institucional.

Implementación de estrategias de mejora continua en el Bachillerato de Educación a Distancia

2018 ◽  
Vol 10 (20) ◽  
pp. 37
Author(s):  
Elisa María Lankenau Caballero ◽  
Anny Frid Ramos
Keyword(s):  
Ad Hoc ◽  
Nuevo Leon ◽  
Educación A Distancia ◽  
Nuevo León

<p>Desde 2013, la Preparatoria No. 2 de la Universidad Autónoma de Nuevo León (UANL), por medio del Bachillerato a Distancia, atiende a una población de educativa de carácter nacional. Esto se da a través de una metodología en bloques, congruente con las características particulares de la población estudiantil, entre los que se encuentran adultos con actividades laborales, familiares, educativas y sociales. Esta metodología comprende una serie de acciones estratégicas que permitieron cristalizar el egreso de 98 estudiantes con perfiles competentes <em>ad hoc </em>para su progreso en el campo laboral, o bien, su inserción al Nivel Superior. Asimismo, bajo el compromiso de elevar tanto la calidad educativa del Bachillerato a Distancia como el porcentaje de eficiencia terminal de los estudiantes con estas características, se considera la implementación de nuevas estrategias que permitirían continuar con la mejora del programa.</p>

El impacto de las estrategias del Departamento de Orientación en la modalidad mixta

2016 ◽  
Vol 8 (16) ◽  
pp. 89
Author(s):  
Blanca Elizabeth Garza Garza ◽  
Jorge Rodríguez Cavazos
Keyword(s):  
Nuevo Leon ◽  
Nuevo León

La reprobación y deserción ha sido una problemática constante en la modalidad mixta de la Escuela Preparatoria número 8 de la Universidad Autónoma de Nuevo León (UANL). La población considerada para este estudio fue de treinta y tres alumnos, quienes en los semestres anteriores no llevaban un seguimiento de orientación psicopedagógica. Con la apertura del Departamento de Orientación se definieron las áreas de apoyo en la Orientación Psicológica e Información Profesional y Laboral, dado que son las materias del área de Desarrollo Humano donde se interviene de manera individual, grupal, masiva, en línea, especializada, por pares y mixta. Los ejes de acción son tres: prevención, formación e intervención. Los resultados de la investigación exploratoria han permitido identificar a los alumnos en riesgo de reprobación y aquellos propensos a abandonar la escuela. Con estas acciones ha sido incrementada la eficiencia terminal.

MINERALOGY AND GEOCHEMISTRY OF THE SAN FELIPE FORMATION (UPPER CRETACEOUS) IN THE PEDRO CARRIZALES LOCALITY (RAYONES, NUEVO LEÓN), NORTHEASTERN MÉXICO

2020 ◽  
Author(s):  
Isabel Cossío-Dülmer ◽  
◽  
Carolina Cossío-Dülmer ◽  
Fernando Velasco Tapia ◽  
Yolanda Pichardo-Barrón ◽  
...  
Keyword(s):  
Upper Cretaceous ◽  
Nuevo Leon ◽  
Nuevo León ◽  
Northeastern Mexico

scholarly journals Ethnobotany in Rayones, Nuevo León, México

2014 ◽  
Vol 10 (1) ◽  
pp. 62 ◽  
Author(s):  
Eduardo Estrada-Castillón ◽  
Miriam Garza-López ◽  
José Villarreal-Quintanilla ◽  
María Salinas-Rodríguez ◽  
Brianda Soto-Mata ◽  
...  
Keyword(s):  
Nuevo Leon ◽  
Nuevo León

Ammonite biostratigraphy of two stratigraphic sections of the La Peña Formation (Aptian, Lower Cretaceous) in Nuevo León State, Northeast Mexico

2021 ◽  
pp. 104862
Author(s):  
Ricardo Barragán ◽  
Josep A. Moreno-Bedmar ◽  
Fernando Núñez-Useche ◽  
León F. Álvarez-Sánchez ◽  
Gérard Delanoy
Keyword(s):  
Lower Cretaceous ◽  
Nuevo Leon ◽  
Nuevo León

IX Congreso Nacional ALCONPAT 2020

2020 ◽  
Keyword(s):  
Heritage Preservation ◽  
Nuevo Leon ◽  
Nuevo León ◽  
Maintenance And Rehabilitation ◽  
Infrastructure Investments ◽  
Poster Presentations ◽  
Sanitary Conditions ◽  
Oral Presentations ◽  
Non Destructive ◽  
Virtual Mode

The construction industry is an indicator of economic development: in good times both individuals and companies invest to increase or improve their houses and facilities. The halted construction is an indication of economic difficulties. Hence the importance of protecting infrastructure investments through diagnostic, recovery and construction rehabilitation procedures. IX National Congress ALCONPAT Mexico 2020 addressed the thematic axes: Materials and nanomaterials, Durability and sustainability, Preservation of built heritage, Preservation, maintenance and rehabilitation, Semi and non-destructive tests, Corrosion in concrete structures, Climate Change. Four Plenary Conferences were presented, given by renowned researchers from Spain, Colombia, Mexico and Argentina. Nine Master Conferences were also presented, given by Researchers from the Autonomous University of Nuevo León, Veracruzana University, CNIC of Havana, Cuba and the Autonomous University of Campeche. 61 papers were received, divided into: 35 oral presentations 26 poster presentations. The participating institutions were: Universidad Autónoma de Campeche, Universidad Autónoma de Nuevo León, Universidad Veracruzana, Universidad Autónoma del Estado de Hidalgo, Tecnológico Nacional de México (Instituto Tecnológico de Chetumal), Universidad Autónoma de Chiapas, Cinvestav Unidad Mérida, Universidad Autónoma de Yucatán , Universidad Michoacana de San Nicolás de Hidalgo, Universidad Juárez Autónoma de Tabasco, CIIDIR IPN Campus Oaxaca, Centro Nacional de Investigaciones Científicas de Cuba, Consultor Independiente de Ecuador, Centro Internacional de Matemáticas Numéricas e Ingeniería (España), Universidad Nacional del Sur ( Argentina). Effort and enthusiasm of the participants to carry out the event in virtual mode, due to the existing adverse sanitary conditions, stands out. It is one more indication of the strength of the ALCONPAT community in maintaining the continuity of one of its activities to exchange knowledge and experiences for the improvement of practices aimed at prolonging the durability of the infrastructure.

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