Determinación de las causas infecciosas que influyen en la baja fertilidad de los bovinos pertenecientes a la Granja Experimental Tunshi de la Escuela Superior Politécnica de Chimborazo.

Abstract

The importance of the current study is based on the direct influence that infectious diseases have on the reproductive performance of animals in a milking herd. In Ecuador, the reproductive infectious disease average is an important piece of information that does not have backing or well established studies, whereby a livestock can be affected without presenting symptoms. Through the laboratory diagnosis applied in the milking herd in the experimental farm of Escuela Superior Politécnica de Chimborazo, located in Tunshi. It tried to identify the prevalence of Brucella spp, Bovine Leukosis, Neospora caninum Infectious Bovine Rhinotracheitis (IBR), Viral Bovine Diarrhea (DVB) Leptospira spp (5 serovars). The results were related to reproductive parameters such as: first service fertility age, conception rate at first service, calving interval, calving interval and first service, calving conception interval (open days), number of services per conception and the percentage of abortions to determine if they influence the performance of the animals. With a random sampling of 30 animals, the following incidences were determined: Brucella spp (0%), Bovine Leukosis (46%) Neospora caninum (24%), Infectious Bovine Rhinotracheitis (IBR) (48%), Viral Bovine Diarrhea (36 %) Leptospira spp serovar ictero (0%), Leptospira spp. serovar pomona (10%), Leptospira serovar canicola (12%), Leptospira spp. serovar hardjo (12%), and Leptospira spp serovar Gryppo (0%). Through an association analysis with Chi Square IBM SPSS STATISTICS 20 between infectious diseases and reproductive parameters evidenced that the presence of Bovine Leukosis and Bovine Viral Diarrhea affect the number of services per conception parameter. The reproductive parameters cannot be correctly analyzed because in some cases the parameters are measured as absent: calving interval, conception rate at first service and calving conception interval which have to do directly with the percentage of abortions. Finally, it is necessary to evaluate all the livestock to take urgent corrections.