Bacterina de Staphylococcus aureus contendo própolis como adjuvante para controle da mastite

Abstract

Bovine mastitis is a global health problem and many scientific advances have occurred, but the treatment and prevention of disease with existing techniques do not present satisfactory results. Similarly, there is growing interest in the use of propolis as an alternative for treatment of mastitis, also being the object of studies in order to use as an adjuvant, although so far it has not been described their use in vaccines for the control of bovine mastitis. The importance of Staphylococcus gender as disease agent is well documented, growing need for species identification of the etiologic agent. In a survey of coagulase-positive staphylococci in subclinical mastitis in southern Brazil, was finding its presence in 12.6% of cases with S. aureus was present in 17.6% of animal researched. Among the considered coagulase positive S. aureus is 85.7%, 8.5%, were S. intermedius and 5.8% were identified as S. hyicus. For the S. aureus penetrate, multiply and keep the host uses multiple pathogenic factors. Was researched in the literature to-date information on the main mechanisms expressed by the bacteria and how they operate, alone or integrated to ensure the penetration of micro-organism in the mammary gland, the processes that mediate the formation of biofilms and their coping strategies the host responses, their internalization in the cells and its continuation mechanisms, resulting in processes that often become chronic. To assist in the control of mastitis, is desirable the use of an effective vaccine and thus has been proposed the use of a bacterin containing hydroalcoholic extract of green propolis in the formulation is desirable, being compared to a similar bacterin without propolis, commercial vaccine and sterile PBS on a work carried out on 63 bovines. Similarly, with the same treatment groups and the addition of a group that received only the hydroalcoholic extract of propolis, a study was conducted on 30 BALB/c mice. The research of IgG antibodies in bovines showed that both treatment containing hydroalcoholic extract of propolis as the bacterin without propolis showed similar results and superior to commercial and PBS treatments, and the same treatment, we observed initially characteristic a humoral response with tending to cellular during throughout the experiment. In bovines, the relative expression of mRNA for INF-γ, IL-2 and CXCR5 was raised to the group receiving bacterin containing hidroalcoholic extract of green propolis. The ELISA results were similar to those of bovine in BALB/c still with the group that received only the the alcoholic extract of propolis without any bacterial combination, behaving similarly commercial and PBS, and the response was predominantly IgG1 to during the research. In the murine model, the commercial vaccine showed higher levels of mRNA expression for the studied cytokines. The results indicate that the bacterin containing alcoholic extract of propolis has the potential to act as a tool in the control of bovine mastitis in the target especie, requiring minor adjustments and a job to prove the efficiency in a challenge.