Evaluation of pro biotic activity of an enzimatic hydrolysateof Saccharomycescerevisiaein broilers. Fisiological,fermentative and microbiological indicatorin gastrointestinaltract | Evaluaci6n de la actividad probi6tica de un hidrolizado enzimatico de Saccharomyces cerevisiae en pollos de ceba. I. lndicadores fisiol6gicos, fermentativos y microbiol6gicos en el tracto gastrointestinal

Spanish; Castilian. NS.e realiz6 un experimento con 200 pollos de ceba de un hfbrido comercial para estudiar el efecto probi6tico de un hidrolizado enzimatico de crema de destilerra (Saccharomyces cerevisiae). Se emplearon los cuatro tratamientos siguientes en un diseno completamente aleatorizado: dosis I control (0 ml de hidrolizado / kg de concentrado); dosis 11(50 ml / kg); dosis III(75 ml / kg) Ydosis IV(100 ml / kg). Losmuestreos para medir indicadores fisiol6gicos se realizaron a los 21, 35 Y42 dlas, para estudiar los indicadores fermentativos a los 35 y 42 dras y para determinar el conteo de microorganismos totales, lactobacilos y coliformes en ciego, a los 35 dras. Fue mayor en los tres grupos con hidrolizado el peso relativo del tracto gastrointestinal lIeno y vacfo a los 35 (P0.01) Y42 dras (PO.01)Yel peso relative del hrgado y peso del coraz6n, tambien a los 35 y 42 dras de edad. Loscontenidos de AGCC totales y acido lactico en ciego fueron mayores en los grupos con hidrolizado a los 35 y 42 dras de edad de los animales. Elcomportamiento de los indicadores microbiol6gicos en el ciego, a los 35 dras de edad, mostr6 mayor conteo de anaerobios totales y de Lactobacillus en la dosisde 75 y 100mlde hidrolizado,(50.04x 1010Y69.55X109ufc/ml. respectivamente), mientras que en el conteo de coliformes, los grupos tratados con hidrolizado, tuvieron menor poblaci6n (PO.01)que el control (25 x 1()5,33 x 1()5Y 27 x 1()5vs. 26 x 106).Se concluye que el hidrolizado enzimatico de levadura posee efecto probi6tico sobre los indicadores estudiados.

English. A trial was carried out with 200 broilersfrom commercial hybrid to study the probiotic effect of an enzymatic hydrolysate of distillery cream (Saccharomyces cerevisiae). Four treatments in a completely randomized design were used: dose I control (0 ml of hydrolysate/kg). Sampling for determining physiological indicator were carried out at 21, 35 and 42 days, to measure fermentative indicator at 35 and 42 days and to determine the count of total microorganisms. lactobacillus y coli formes in cecum, at 35 days. There was a better behavior in the three groups, with hydrolisate, in the relative weigh of full and emply digestive tract at 35 and 42 days (PO.Oland PO.Ol, respectivilly) and in the liver and heart weight also at 35 and 42 days, whwn yeast hydrolysate were used. In relation with microbiological indicator in cecal content at 35 days, an increase of totais anderobic microorganisms, count of Lactobacillus in 75 and 100 ml of hydrolysate (50.04 x 1018and 69.55 x 109ufc/mL respectively) were obtained. By other hands, a disminution in count of coliformes in whole hydrolysate group treat were reached in reiation to the control group animals (PO.Ol)(25 x 1CJ5,33 X 105y 27 x 1CJv5s 26 x 1CJ5A).n increased in AGCC content and lactic in cecum in the groups treated with hydrolysate at 35 and 42 days were obtaided, too. As a mean conclusion to this paper, the yeast enzymatic hydrolysate had a probiotic efect on those indicator studied. It is recomendad to use a larger of amals for making study on other important imnunological and productive indicator.