Qualidade do colostro de vacas criadas em propriedades rurais de Paulistana e Jacobina do Piauí, Piauí

Abstract

Bovine colostrum plays a fundamental role in the transfer of passive immunity to newborn calves, and colostral quality is decisive for the reduction of neonatal morbidity and mortality. The objective of this study was to evaluate the quality of bovine colostrum on properties located in the Itaim River Valley Territory – PI. The study was conducted in na observational, cross-sectional and quantitative way, with collections of colostrum samples in the laboratory using a previously calibrated Brix refractometer. The concentration of IgG was estimated indirecty from the values of %Brix, considering as good quality colostrum those with equal to or greater than 22% Brix, as established in the literature. The data were submitted to descriptive and qualitative statiscal analysis. The global average was 23% of Brix, na index Higher than the established quality limit. In qualitative stratification, 77,78% of the matrices presented excellent colostrum, highlighthing Jersey animals, with 31% Brix. Concluded that evaluated colostrum has satisfatory immunological potential, but that failures in neonatal management can mask the genetic aptitue of the herd. Brix refractometry consolidates itself as na indispensable, low-cost and easy-to-run screenting tool in the region.