VIABILIDAD DE QUISTES DE G. LAMBLIA Y OOQUISTES DE C. PARVUMEN EL TRATAMIENTO DE AGUAS RESIDUALES CONVENCIONAL
2012
Los quistes de Giardia lamblia y ooquistes de Cryptosporidium parvum causan enfermedades intestinales en animales y seres humanos a traves del consumo de agua y alimentos contaminados. Los quistes y ooquistes son resistentes a los sistemas de cloracion convencional. La dosis infecciosa minima es de aproximadamente 10 quistes/ooquistes ingeridos. Para la cuantificacion de los quistes y ooquistes se utilizo el metodo ICR. La determinacion de la viabilidad se realizo mediante tincion vital y contraste de fases. Despues del proceso de tratamiento en la PTAR los quistes de Giardia lamblia se encuentran viables en un 39% y los ooquistes deCryptosporidium parvum en el 71%. La concentracion de quistes de Giardia lamblia y ooquistes de Cryptosporidiumparvum aumenta en otono. Se observo una diferencia significativa (p <0,05), en la incidencia de quistes de Giardialamblia durante la investigacion. Abstract Giardia lamblia cysts and Cryptosporidium parvum oocyst come to cause intestinal diseases through the consumption of contaminated food and water by humans and animals. Cysts and oocysts are resistant to normal chlorination systems. The minimum infectious doses are approximately 10 cysts / oocysts ingested. The ICR method was used for quantification of cysts and oocysts. The determination of viability was performed by vital staining.Giardia lamblia cysts were found in greater numbers than Cryptosporidium parvum oocysts. Giardia lamblia cysts were viable at 39% after the treatment process and Cryptosporidium parvum oocysts at 71%. The incidence ofGiardia lamblia and Cryptosporidium parvum is higher in autumn. During the investigation the Giardia lamblia cysts incidence were significantly affected (p <0.05). Palabras clave: Giardia lamblia, Cryptosporidium parvum, agua, alimentos, contaminacion
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