Thesis (Ingeniero Zootecnista)--Escuela Superior Politʹecnica de Chimborazo. Facultad de Ciencias Pecuarias. Escuela de Ingenieraia Zootecnica. / Abstract in Spanish and English.

Thesis (Ingeniero Zootecnista)--Escuela Superior Politʹecnica de Chimborazo. Facultad de Ciencias Pecuarias. Escuela de Ingenieraia Zootecnica. / Abstract in Spanish and English.

This investigation was accomplished in the Experimental Station Tunshi Productive Unit Sheep Goat, located to an altitude of 2747 m.s.n.m. and with an average temperature of 13.1°C, it located to 8 kilometers of Riobamba route to Licto and in the Laboratory of Microbiology of the Cattle Sciences Faculty of the Espoch, during 120 days (November of 1998 to February of 1999). The principal objective was that of to evaluate the effect terapeutics of the plant Spigelia anthelmia against parasitesinternal in lambs, for something which is 20 lambs native males with ages that fluctuated of 6 to 9 months, these animals stayed in estabulación fed with forage of good quality (alfalfa + ray grass) and concentrated. Then of the period of adjustment were effected exams coprologycs quantitative to determine the load parasites initial, then was them applied 4 treatments with 5 repetitions each one, the experimental unit was 1 lamb. For the evaluations of PGI, they were studied the days 1,2,3,4,5,6,15,30,45,60 subsequent to the application; to determine the percentages of efficiency against PGI were studied the days 15, 30, 45 and 60; to determine the efficiency to combat Pulmonary Parasites were evaluated the days 15,30 and 60 subsequent to the application. The laboratory techniques that were employed were that of Mc Master, Flotation, Sedimentation, Migration. The obtained results were submitted to the techniques of the ADEVA and Contrast Ortogonals at the levels of probabilities of 0.05 and 0.01, establishing that the alcaloide Spiegilina contained in the Spigelia anthelmia produced a decrease of HPG of PGI without arriving to zero, this effect would be caused by the decrease of the female adult, its action in eggs, juvenile states, adult males is done not know; this plant did not show positive effects against PP; they were not observed sound effects. For it previously exposed is recommended to prove this plant in different forms of preparations and in not ruminant addressee and to evaluate findings post – mortem and Productive Parameters. To prefer the Panvermín L front to the Virbamec by the cost for the gastrointestinal and pulmonary parasites treatment in lambs native.