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 ◽  
...  

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.

2020 ◽  
Author(s):  
Natalia Martinez-Acuña ◽  
Diana Avalos-Nolazco ◽  
Diana Rodriguez-Rodriguez ◽  
Cynthia Martinez-Liu ◽  
Rogelio Cazares Taméz ◽  
...  

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.


2020 ◽  
Vol 19 (2) ◽  
pp. 1-20 ◽  
Author(s):  
Milton Carlos Guevara Valtier ◽  
Karla Judith Ruíz-González ◽  
Luis Arturo Pacheco-Pérez ◽  
Jesús Melchor Santos Flores ◽  
Patricia González de la Cruz ◽  
...  

Objetivos: Conocer la prevalencia de la adicción a la comida de acuerdo a la edad, sexo e índice de masa corporal, y determinar la asociación entre la adicción a la comida y el estado nutricional en adolescentes del norte de México. Método: Estudio descriptivo correlacional de corte transversal, realizado durante agosto y septiembre de 2018. La población se conformó por 630 adolescentes estudiantes de 15 a 17 años de edad, de una preparatoria pública en Nuevo León, México, a los que se les realizaron mediciones antropométricas y se empleó el cuestionario Yale Food Addiction Scale. Resultados: Una muestra de 245 adolescentes, predominando el sexo femenino (53,1%), con una edad media de 15,83 años, la media de índice de masa corporal fue de 23,18 kg/mt2 (S = 3,74) en hombres y 24,57 kg/mt2 (S = 4,00) en mujeres. El 87,8% de los adolescentes presentó positivo el criterio “deseo frustrado de parar el consumo”, el 36,3% la tolerancia, y el 34,3% el consumo a pesar de las consecuencias. El 20,7% de los adolescentes con sobrepeso presentan adicción a la comida. Conclusiones: La mayoría de los adolescentes presentan peso normal, las mujeres presentaron un índice de masa corporal mayor que el de los hombres, menos de la mitad de los participantes presenta adicción a la comida predominando los criterios positivos en mujeres, adolescentes en condición de sobrepeso, obesidad y de mayor edad. No se encontró asociación entre adicción a la comida y estado nutricional. Objective: To know the prevalence of food addiction according to age, sex, and body mass index and to determine the association between food addiction and nutritional status in adolescents from northern México. Method: Cross-sectional study with a descriptive and correlational design, carried out during August and September 2018; the study population was comprised by 630 adolescents, students, ranging from 15 to 17 years of age, from a public high school in Nuevo Leon, Mexico. Anthropometric measurements were taken and the Yale Food Addiction Scale questionnaire was used. Results: A sample of 245 adolescents predominantly female (53.1%), with a mean age of 15.83 years; mean body mass index was 23.18 kg/mt2 (S = 3.74) in males and 24.57 kg/mt2 (S = 4.00) in females; 87.8% of adolescents showed positive to the frustrated desire to stop consumption criterion, 36.3% tolerance, and 34.3% consumption despite the consequences; 20.7% of overweight adolescents showed food addiction. Conclusions: The majority of adolescents showed normal weight, while women showed a body mass index (BMI) higher than men; less than half of the participants had food addiction; positive criteria prevailed in women, and adolescents with overweight and obesity, and older. No association was found between food addiction and nutritional status.


2021 ◽  
Author(s):  
Mars Stone ◽  
Clara Di Germanio ◽  
David J. Wright ◽  
Hasan Sulaeman ◽  
Honey Dave ◽  
...  

Introduction: The REDS-IV-P Epidemiology, Surveillance and Preparedness of the Novel SARS-CoV-2 Epidemic (RESPONSE) seroprevalence study conducted monthly cross-sectional testing for SARS-CoV-2 antibodies on blood donors in six U.S. metropolitan regions to estimate the extent of SARS-COV-2 infections over time. Study Design/Methods During March-August 2020, approximately ≥1,000 serum specimens were collected monthly from each region and tested for SARS-CoV-2 antibodies using a well-validated algorithm. Regional seroprevalence estimates were weighted based on demographic differences with the general population. Seroprevalence was compared with reported COVID-19 case rates over time. Results/Findings: For all regions, seroprevalence was <1.0% in March 2020. New York experienced the biggest increase (peak seroprevalence, 15.8 % in May). All other regions experienced modest increases in seroprevalence(1-2% in May-June to 2-4% in July-August). Seroprevalence was higher in younger, non-Hispanic Black, and Hispanic donors. Temporal increases in donor seroprevalence correlated with reported case rates in each region. In August, 1.3-5.6 estimated cumulative infections (based on seroprevalence data) per COVID-19 case reported to CDC. Conclusion: Increases in seroprevalence were found in all regions, with the largest increase in New York. Seroprevalence was higher in non-Hispanic Black and Hispanic blood donors than in non-Hispanic White blood donors. SARS-CoV-2 antibody testing of blood donor samples can be used to estimate the seroprevalence in the general population by region and demographic group. The methods derived from the RESPONSE seroprevalence study served as the basis for expanding SARS-CoV-2 seroprevalence surveillance to all 50 states and Puerto Rico.


Author(s):  
Luca Valenti ◽  
Annalisa Bergna ◽  
Serena Pelusi ◽  
Federica Facciotti ◽  
Alessia Lai ◽  
...  

Background&Aims: The Milan metropolitan area in Northern Italy was among the most severely hit by the SARS-CoV-2 outbreak. The aim of this study was to examine the seroprevalence trends of SARS-CoV-2 in healthy asymptomatic adults, the risk factors, and laboratory correlates. Methods: We conducted a cross-sectional study in a random sample of blood donors since the start of the outbreak (February 24th to April 8th 2020, n=789). Presence of IgM/IgG antibodies against the SARS-CoV-2-Nucleocapsid protein was assessed by a lateral flow immunoassay. Results: The test had a 100/98.3 sensitivity/specificity, and for IgG+ was validated in a subset by an independent ELISA against the Spike protein (N=34, P<0.001). At the outbreak start, the overall adjusted seroprevalence of SARS-CoV-2 was 2.7%, 95% c.i. 0.3-6% (P<0.0001 vs. 120 historical controls). During the study period characterized by a gradual implementation of social distancing measures, there was a progressive increase in adjusted seroprevalence to 5.2%, 95% c.i. 2.4-9.0, due to a rise in IgG+ tests to 5%, 95%CI 2.8-8.2 (P=0.004 for trend, adjusted weekly increase 2.7+/-1.3%), but not of IgM+ (P=NS). At multivariate logistic regression analysis, seroconversion to IgG+ was more frequent in younger (P=0.043), while recent infections (IgM+) in older individuals (P=0.002). IgM+ was independently associated with higher triglycerides, eosinophils, and lymphocytes (P<0.05). Conclusions: SARS-CoV-2 infection was already circulating in Milan at the outbreak start. Social distancing may have been more effective in younger individuals, and by the end of April 2.4-9.0% of healthy adults had evidence of seroconversion. Asymptomatic infection may affect lipid profile and blood count.


2021 ◽  
Vol 19 (137) ◽  
pp. 21
Author(s):  
José Rafael González Díaz

On January 20, 1919, Columbia University decided to introduce the Contemporary Civilization course. This new academic program became over time one of the most successful in the American education. The purpose of the course was to understand the world’s problems and their solutions. Only a cultivated student can develop a deep understanding of himself and society, and the ability to make his or her own judgments. The project was inspired by John Erskine’s (1879-1951) the moral obligation to be intelligent. Daniel Cosío Villegas (1898-1976) promoted the introduction of the Contemporary Civilization course in Mexico in the new curriculum (1958) of the Faculty of Economics of Nuevo León. In this research we explore the historical circumstances of this course and the challenges faced by Consuelo Meyer L’Epée (1918-2010) in its implementation.


2020 ◽  
Vol 20 (2) ◽  
pp. 201-217
Author(s):  
NANCY PONCE CARBAJAL ◽  
José Leandro Tristán Rodríguez ◽  
José Carlos Jaenes Sánchez ◽  
Luis Tomas Rodenas Cuenca ◽  
Rafael Peñaloza Gómez

Los objetivos de este estudio fueron identificar los factores de contexto social que más influyen sobre la personalidad resistente (PR), y además encontrar los factores del contexto social que mejor se relacionan con el control del compromiso y desafío de la personalidad resistente. Participo un grupo de 174 deportistas universitarios de 16 diferentes deportes, que compitieron en la Universiada Nacional 2017, en Monterrey, Nuevo León (México). Los instrumentos que se utilizaron fueron dos: el cuestionario sobre Percepción de Factores relacionados con la Excelencia en el Deporte (PFED) y el cuestionario de Personalidad Resistente en Deportistas Centroamericanos y del Caribe (PRDCC). La metodología que se utilizó fue un diseño transversal, correlacional causal, de tipo no experimental. Los resultados mostraron que el factor del contexto social de mayor influencia sobre la personalidad resistente total son la naturaleza del entrenamiento (β = 3.21; p< .01) y las características del entrenamiento (β = 3.80; p< .01) , además de que ambas predicen los factores de control (β = 3.83, β = 3.81; p< .01) y compromiso (β = 3.89, β = 3.67; p< .01). En las correlaciones se encontró que la naturaleza del entrenamiento tiene una relación con el desafío r= .415 ** con el compromiso con un valor de r= .323 ** y el control con las características del entrenamiento con un valor de r=288 ** y la naturaleza del entrenamiento de manera global correlaciono con la PR total con un valor de r= 382 **.Por lo tanto, se concluye que el entrenador, los gestores administrativos y el equipo multidisciplinario impactan el desarrollo deportivo y promueven el compromiso y el gusto por los desafíos. The objectives of this study were to identify the social context factors that most influence the Resistant Personality (RP), and also find the social context factors that best relate to the control of the commitment and challenge of the resistant personality. The participants were 174 university athletes from 16 different sports, who competed in the 2017 National Universiade, in Monterrey, Nuevo León (Mexico). The instruments used are two: the questionnaire on the Perception of Factors related to Excellence in Sport (PFES) and the questionnaire of Resistant Personality in Central American and Caribbean athletes (RPCC). The methodology that was used was a cross-sectional, correlational, causal, non-experimental design. The results showed that the social context factor with the greatest influence on the total resistant personality is the nature of the training (β = 3.21; p <.01) and the characteristics of the training (β = 3.80; p <.01), in addition to that both predict the control factors (β = 3.83, β = 3.81; p <.01) and commitment (β = 3.89, β = 3.67; p <.01) In the correlations it was found that the nature of the training has a relationship with the challenge r = .415 ** with the commitment with a value of r = .323 ** and the control with the characteristics of the training with a value of r = 288 ** and the nature of the training in a global way correlated with the Total PR with a value of r = 382 **. Therefore, it is concluded that the coach, the administrative managers and the multidisciplinary team impact sports development and promote commitment and a taste for challenges. Os objetivos deste estudo foram identificar os fatores do contexto social que mais influenciam a Personalidade Resistente (PR) e também encontrar os fatores do contexto social que melhor se relacionam com o controle do comprometimento e desafio da personalidade resistente. Participaram 174 atletas universitários de 16 esportes diferentes, que competiram da Universiade Nacional de 2017, em Monterrey, Nuevo León (México). Os instrumentos utilizados são dois: o questionário sobre a percepção de fatores relacionados à excelência no esporte (PFEE) e o questionário de personalidade resistente em atletas da América Central e do Caribe (PRACC). A metodologia utilizada foi o delineamento transversal, correlacional, causal e não experimental. Os resultados mostraram que o fator de contexto social com maior influência na personalidade resistente total é a natureza do treinamento (β = 3,21; p <0,01) e as características do treinamento (β = 3,80; p <0,01), além de que ambos preveem os fatores de controle (β = 3,83, β = 3,81; p <0,01) e comprometimento (β = 3,89, β = 3,67; p <0,01) Nas correlações, verificou-se que a natureza do treinamento tem uma relação com o desafio r = 0,415 ** com o compromisso com um valor de r = 0,332 ** e o controle com as características do treinamento com um valor de r = 288 ** e a natureza do treinamento de forma global correlacionada com a PR total com um valor de r = 382 **. Portanto, conclui-se que o treinador, os gerentes administrativos e a equipe multidisciplinar impactam o desenvolvimento do esporte e promovem o comprometimento e o gosto por desafios.


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

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.


2018 ◽  
Vol 10 (20) ◽  
pp. 37
Author(s):  
Elisa María Lankenau Caballero ◽  
Anny Frid Ramos

<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>


Author(s):  
Blanca Elizabeth Garza Garza ◽  
Jorge Rodríguez Cavazos
Keyword(s):  

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.


2020 ◽  
Author(s):  
Isabel Cossío-Dülmer ◽  
◽  
Carolina Cossío-Dülmer ◽  
Fernando Velasco Tapia ◽  
Yolanda Pichardo-Barrón ◽  
...  

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