Estudio de la fertilidad y viabilidad de quistes hidatídicos bovinos en Chile

Abstract

They were sampled 4,709 animals from a universe of 83,691 bovines slaughtered in a meat processing plant of Santiago, Chile. Origin, sex, category of the animals and visceral location of the cysts were registered in place. The size of the cysts and the presence or absence of protoscolices (fertility) were determined in a laboratory. The viability of the protoescolices were determined by the tincture with Trypan blue. 75% of the animals were from the south of Chile. In the 6 regions studied, around 16% of the bovines were positive to hydatidosis; 100% of the older animals (cows, bulls and oxen) and only 9.1 % of the younger animals were positive. 74% of the hydatid cysts were located in the lung, 25.6% in the liver and 0.4% in the spleen. With the age of the bovines increases the proportion of hepatic cysts. In the younger animals 67% of the cysts has less than 10 mm of diameter and all of them were infertile. In the older animals all cysts has more then 10 mm of diameter; 39.4% were fertile, 17.6% infertile and 43% altered. 82.7 % of the lung cysts and 15.8% of the hepatic cysts with more than 10 mm of diameter were fertile; 90.8% of them presented living protoscolices.