Caracterização dos sistemas de produção leiteiros e fatores de risco para mastites subclínicas

Abstract

Milk production in Brazil is complex in nature, because it depends on a base consisting of producers of low production scale and diversity strategies. Despite the volume of milk produced, the quality of the raw material is one of the biggest barriers to technology development activity in Brazil. Among the barriers takes highlight the somatic cell count of milk. In order to characterize the production systems of milk and identify differences in management between the groups formed by identifying the risk factors that lead to subclinical mastitis and the main causative agents of same from Marechal Cândido Rondon - PR, held two works. First, 735 semi-structured interviews with dairy farmers, using a questionnaire to guide management practices related to the diversity of production systems were made. With aid analysis of "cluster" formed five distinct and homogeneous groups (G1, G2, G3, G4 and G5) of production systems. After the formation of five groups selected at random 10 % of producers in each group, so these represent the group itself, totaling 73 systems chosen. Later was collected bulk tank milk in 73 properties. After established which properties did not fit the normative instruction MAP 62, held a second gathering in these properties, collections consisting of the application of two questionnaires, monitoring of a milking and collecting milk from three cows being positive CMT. In the analysis of ascending hierarchical classification was possible to reduce the early universe, where samples of 112 cows were collected for four homogeneous production groups (B1, B2, B3, B4) obtained from the intersection of CP1 and CP2 axes, and, highlighting for the formation of groups the type of milking, drying of the teats before milking, treatment for cases of clinical mastitis, hand hygiene and the milker training of officers were identified as possible risk factors for subclinical mastitis isolation of coagulase negative Staphylococcus agent, which was the most prevalent agent in microbiological isolates from milk samples with subclinical mastitis