Efecto de la vacunación antiaftosa sobre algunos parámetros bioquímicos y productivos indicadores de estrés en vacas lecheras de la sabana de Bogotá

Abstract

Maintaining Colombia's status as a country free of foot-and-mouth disease by vaccination implies enormous government efforts in the hands of livestock associations and laboratories producing the vaccine. However, some reports from Veterinarians and dairy cattle owners, on the negative effects of the vaccine on the health and well-being of the animals and the productivity of their herds, discourage the use of this biological. Based on this problem, this research work was developed to determine the effect of the vaccination process on stress levels and some blood parameters and productive indicators of this in dairy cows. The work was developed in a dairy herd in the Sabana de Bogotá, located at 2,550 m.a.s.l. with daily temperatures between 4 and 20 degrees Cº. For the study, 40 adult cows in production were randomly selected and were assigned in the same way, randomly, to 5 treatments: intramuscular vaccination in the hindquarters, subcutaneous vaccination in the neck table, intramuscular saline injection in the hindquarters, injection of saline solution in the neck table and a control group subjected to pen management, but without any injection. Albumin, globulin, C-reactive protein and Cortisol levels were analyzed at 2 hours and 72 hours after treatment and milk production from 48 hours before treatment to 5 days after. The results showed a higher level of plasma cortisol in the cows vaccinated with subcutaneous injection (p <0.05), a marked increase in C-reactive protein and globulin at 72 hours for the intramuscular and subcutaneous vaccine (p <0.05). The milk production did not have significant changes during the sampling time. It is concluded that vaccination by the subcutaneous route in the neck table generates a greater stress, than intramuscular vaccination in the hindquarters.