The in vitro Intensity of Bacterial Inhibition Activity (IINIB) and the Intensity of Bacterial Inactivation Activity (IINAB) of diverse aqueous alcoholic/hydroalcoholic from extracts of 59 plants with medicinal or spice ethnographic indicative assessed in Porto Alegre/RS/BR, were determinated against Escherichia sp. (or E. coli ATCC nº 11229 or E. coli p.16 CPVDF - SAA/RS) in challenge doses < 10(8) CFU.mL-1. Extracts of 30 plants presented some anti-Escherichia coli selective activity while the remaining 29 plants presented no activity. The validity of ethnographical search instruments in the prospection of anti-bacterial protection factors in plants and the influence of inhibition/inactivation results in the prediction of E. coli diagnostic were discussed.
plants' antibacterial activity; bacterial inhibition; bacterial inactivation; anti-Escherichia coli activity; medicinal plants ethnography
