Efeito do uso de cultura simbiótica no sucedâneo do leite sobre parâmetros hematológicos, bioquímicos, fecais e corporais de bezerros leiteiros

Abstract

Although dairy farming has developed a lot in recent years, the control of diarrhea in Holstein calves is still very difficult, since there is still a need for economic detachment for such control. The use of symbiotics has been widely studied and is a promising alternative in combination with antibiotics or alone. Re-establishing the gastrointestinal microenvironment improves absorption and increases the animals' immunity. This work was developed to evaluate the hematological, biochemical, fecal and body parameters of dairy calves that received a milk replacer containing a symbiotic culture of bacteria and yeast (CSBL) for a period of 30 days. The experiment was approved by CEUA under protocol 2000090. Twenty-four male Holstein calves were used, which, when properly colostrated on the day of birth, were taken to the experiment site. The calves were randomly divided into four distinct groups: a control group, a 0.5 g CSBL group, a 1.0 g CSBL group and another 2.0 g CSBL group. Every 15 days, blood samples were taken to assess hematological and biochemical parameters. The calves were weighed weekly and their body measurements were also measured (withers, rump and thorax). The group treated with 0.5 g and 1.0 g CSBL, showed greater weight gain and body performance, as well as better control of the consistency of their stools, which remained within normal and soft parameters, without diarrhea. The hematological and biochemical parameters showed mostly positive action to the use of CSBL. It is noteworthy that the concentration of CSBL 2.0 g had no or negative effect on the parameters observed in treated calves. The concentration of CSBL 0.5 g, in addition to providing a better yield, easy handling, results in an excellent cost-benefit ratio for the producer, acting positively in one of the diseases that most damage the dairy activity, diarrhea.