This research has been performed on the vegetative parts of the
Horsetail Equisetum arvense L. v.ilich grows naturally in Haj Umran , north of Iraq , to determine and estimate some active chemical compounds , besides studyi ng their inhi bitory effe(;tS upon some urinary tracts infections (UTI) bacteria through the
investigation on the inhibitory effects of water and ethanolic extracts of this plant .
The results revealed presr.:nr.:t: of some active chemical compounds such as: tannins, saponins, resins, flavonoids and glycosides. The ethanolic extracts has an inhibitory effect upon UTI bacteria (gram+ve & gram-vc) according to agar well
diffusion method. Proteus mirabi/is and Pseudomonas aeruginosa
were more sensitive than Staphylococcus aureus and Klebsiella spp.
