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Rev. Inst. Nac. Hig ; 41(2): 46-51, dic. 2010. tab
Article in Spanish | LILACS, LIVECS | ID: lil-631782

ABSTRACT

La contaminación bacteriana de alimentos que se consumen en la calle servidas por expendedores ambulantes constituye una alternativa alimentaria para los trabajadores y estudiantes, pero a la vez es fuente de enfermedades trasmitidas por alimentos a los consumidores, para el estudio de la acción de hornos microondas sobre la contaminación de alimentos se tomaron setenta y siete (77) muestras de alimentos de la ciudad de Trujillo-Venezuela, colectadas en expendios (21 perros calientes, 32 empanadas y 24 arepas), tomadas en condiciones de asepsia se trasladaron en cadena de frío hasta el laboratorio para su estudio. De cada muestra se separaron dos partes, una para irradiarla con microondas durante un minuto para luego someterla al estudio bacteriológico y otra control sin el citado tratamiento. Se confirmó contaminación fecal en el 60% de las muestras examinadas, la exposición a microondas durante un minuto redujo en un 85,4% las cargas de bacterias coliformes. Los resultados demuestran la destrucción de bacterias en un 90% de perros calientes, 40% en empanadas y 66,6% de arepas que resultaron positivas. La acción del microondas sobre los alimentos resultó ser una técnica efectiva para reducir las cargas de bacterias contaminantes.


Food that is served by mobile stall and consumed on the street is a nutritional alternative for workers and students but, sometimes, the bacterial contamination of this “fast food” can be a diseasis transmitted by food to consumer. In this study of the effect of microwave ovens on the contamination of food, seventy-seven examples of “fast food” were collected from mobile stalls (twenty-one hot-dogs, thirty-two empanadas and twenty-for arepas). The sample were taken in aseptic conditions and transferred to the laboratory in cold storage. Each sample was divided into two parts. One part was irradiated with microwaves for one minute and the subjected to a bacteriological analysis. The other was not subjected to the radiation treatment. Fecal contamination was confirmed in 60% of the samples examined; the one minute exposure to microwaves reduced the levels of bacterial coliforms by 85.4%. The results revealed the destruction of bacteria in 90% of the hot-dogs, in 40% of the empanadas and in 66.6% of de arepas that were diagno-sed as positive. The effect of microwaves proved to be an effective technique in reducing the levels of bacterial conta-minants in food-stuffs.


Subject(s)
Humans , Male , Female , Food Contamination/analysis , Food Contamination/prevention & control , Foodborne Diseases/complications , Microwaves/therapeutic use , Public Health , Coliforms/classification
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