Tannin-rich tree bark extracts inhibit the development of bacteria associated with bovine mastitis

Condensed tannins were quantified in the barks of selected tree species, and antibacterial activity these substances against clinical subclinical isolates bovine mastitis evaluated. Tree from Mimosa tenuiflora, caesalpiniifolia, Anacardium occidentale, Stryphnodendron adstringens used, as well commercial tannin Acacia mearnsii. The extracted using a mixture ethyl alcohol acetone. moisture content (MC), Stiasny index (SI), total solids (TSC), condensed (CT) measured. evaluation antimicrobial was determined by applying disk diffusion test. species that showed highest CT M. tenuiflora A. with 37.3% 37.3%, respectively. SI obtained occidentale values above 90%. bacterium lowest resistance to use Streptococcus uberis. mearnsii only one capable inhibiting growth Escherichia coli, mean inhibition halo 9 mm. All under study high their barks. In addition showing good performance agents, indicated potential applications development natural medicines for treatment mastitis.