Asked by: Princess O'Kon Score: 4.2/5(30 votes) Uva ursi works as an antimicrobial and has been shown to act againstE.coli, Proteus mirabilis, Pseudomonas aeruginosa, Staphylococcus aureus and 70 otherurinary tract bacteria. It is believed the antimicrobial action is due to arbutin and hydroqu...