Avaliação da composição e qualidade do leite durante a lactação de vacas de um rebanho no norte do Tocantins

Abstract

Problems related to milk quality usually originate from the rural property and this causes many damages to the farmer, these problems may be due to the precariousness of the facilities, improper storage of the product and the poor hygiene of the milking that favor the emergence of mastitis. Of the diseases that affect dairy cattle mastitis is the most relevant because it causes numerous losses to dairy production, causing economic costs to producers and the dairy industry. The damages characterized by the occurrence of this disease are: reduction in milk production, milk discard of cows under treatment, decrease in milk quality, drug costs, among others. It is important to highlight that this disease results in financial losses in all situations, because when there is clinical mastitis, the losses are due to the need for milk treatment and disposal, and when there is subclinical mastitis, there is a decrease in milk production from the cow or herd. question. Thus, it is essential to use hygienic-sanitary measures to improve the production performance of the herd, avoiding contamination between animals. Among the diagnostic methods for bovine mastitis are the California Mastitis Test (CMT), milk curling and the Somatic Cell Count (CCS). The objective of this study was to evaluate the composition and quality of milk as well as the incidence of mastitis in dairy cows by CCS and CMT and to evaluate the incidence of clinical and subclinical mastitis according to the different lactation stages of the animals.