Zearalenone adsorption capacity of lactic acid bacteria isolated from pigs

ABSTRACT The ability to adsorb zearalenone by five strain of lactic acid bacteria was evaluated: four strains of Lactobacillus spp. isolated from pig rectal swabs and one commercial strain (Lactobacillus rhamnosus). Several factors affecting the adsorption capacity were evaluated in order to improve the adsorption of the mycotoxin by bacteria. The stability of the zearalenone-bacteria complex was analyzed. In every case, bacterial adsorption capacity was higher than 40.0%. The strain showing the highest adsorption (68.2%) was selected for the following steps of this research. The adsorption percentages obtained after processing 6.5 and 7.5 mL MRS broth were 57.40% + 3.53 and 64.46% + 0.76, respectively. The stability of zearalenone-bacteria complex was evaluated by successively rinsing. In the first rinsing step 42.26% + 0.414 was still bound. In the second rinsing step 25.12% + 0.664 was still bound, whereas 15.82% + 0.675 remained in the pellet after the third rinse. Results obtained demonstrated that Lactic Acid Bacteria has capacity to adsorb zearalenone. Finally adsorption was increased using a higher volume of initial broth. These results could be used to design a new lyophilized powder for detoxification, using lactic acid bacteria as potential zearalenone adsorbents.

Factores de riesgo para enfermedad cardiovascular en aspirantes a una empresa de obras civiles en Yopal - Casanare, 2010 / Risk factors for cardiovascular disease in applicants to a civil works company in Yopal-Casanare, 2010

Introducción: en Colombia, según estadísticas recientes, las enfermedades cardiovasculares representan la segunda causa de mortalidad. En tal sentido, para Casanare, en 2009, la mortalidad fue de 54,3%. Objetivo: determinar la prevalencia de factores de riesgo cardiovascular y establecer el riesgo coronario a diez años, en aspirantes a ingresar a una empresa de obras civiles atendidos por salud ocupacional/laboral en una Institución Prestadora de Servicios de Salud en Yopal-Casanare, durante 2010. Métodos: estudio descriptivo transversal a partir del total de historias clínicas de personal masculino con exámenes de laboratorio. Análisis con Epi-Info-3.3.2® y SPSS-15.0® mediante medidas de frecuencia-dispersión-tendencia central, asociación: Χ2, razón de verosimilitudes, odds ratio (OR) y riesgo coronario según tabla de Framingham. Resultados: se revisaron 142 historias clínicas, con edad promedio de 34,7 (rango= 19-66) años; factores de riesgo cardiovascular 98,6%, sobrepeso/obesidad 48,6%, hipercolesterolemia 43,7%, hipertrigliceridemia 57,0%, colesterol-HDL 17,6%, hiperglucemia 7,0%, dislipidemia 28,9%, hipertensión 8,5%. Prevalencia de hábito de fumar 9,9%, consumo de alcohol 31,7%, sedentarismo 81,7%. Antecedentes familiares: hipertensión 7,7%, diabetes 5,6%, enfermedad coronaria 1,4%. Relación entre fumar/hipercolesterolemia-OR=3,77 (IC 95%=1,01-15,22), actividad-física/colesterol-HDL-OR=0,3 (IC 95%=0,1-0,88), fumar/riesgo-cardiovascular-OR=34,64 (IC 95%=2,79-947,4). Estimación según Framingham, bajo riesgo coronario <1 5%= 97,2%. Conclusiones: pocos individuos manifestaron no fumar, consumir alcohol y practicar actividad física lo cual podría representar el "efecto de trabajador sano". Se evidenció bajo riesgo coronario, fuerte relación entre fumar/hipercolesterolemia así como en protección de la actividad física versus niveles de riesgo en el colesterol-HDL. Recomendaciones: fortalecer acciones de información-educación-comunicación para prevenir factores de riesgo cardiovascular, generar programas laborales en estilos de vida saludables y realizar estudios de cohorte para hacer más exacto el pronóstico de riesgo del evento a diez años en el país.

Introduction: according to recent statistics, in Colombia cardiovascular diseases represent the second cause of mortality. In Casanare, mortality in 2009 due to cardiovascular disease was 54.3%. Objective: to determine the prevalence of cardiovascular risk factors and establish coronary risk at ten years in applicants aspiring to join a civil works company cared by an occupational health service institution in Yopal (Casanare) in 2010 . Methods: cross-sectional study from medical records of male personnel with laboratory tests. Analysis with Epi-Info-3.3.2-15.0® and SPSS® by measures of frequency, central trend and dispersion. Bivariate analysis was checked by Χ2, likelihood ratio, odds ratio (OR) and 10-year coronary risk according to Framingham table. Results: we reviewed 142 medical records; mean age was 34.7 years (range 19-66). 98.6% had cardiovascular risk factors, 48.6% presented overweight / obesity, 43.7% had hypercholesterolemia, 57.0% hypertriglyceridemia ,17.6% HDL cholesterol, 7.0% hyperglycemia, 28.9% dyslipidemia, and 8.5% hypertension. Smoking prevalence was 9.9%, alcohol consumption 31.7%, and 81.7% had a sedentary life. Family history: hypertension 7.7%, 5.6% diabetes, coronary heart disease 1.4%. Relationship between smoking / hypercholesterolemia, OR = 3.77 (95% CI = 1.01-15.22), physical activity/HDL cholesterol OR = 0.3 (95% CI = 0.1-0.88 ), smoking / cardiovascular risk OR = 34.64 (95% CI = 2.79-947.4). Estimate according to Framingham, low coronary risk <1 5% = 97.2%. Conclusions: few individuals reported not smoking, drinking alcohol and doing physical activity, which could present the "healthy worker effect". Low coronary risk was revealed, as well as strong relationship between smoking / hypercholesterolemia and protection of the physical activity versus HDL cholesterol risk levels.