Antimicrobial activities of selected medicinal plants of southwest

CHED 228

Kaveh Zarrabi, kaveh_zarrabi@ccsn.edu1, Seanna Larson1, Mike Lum1, Michelle Mizo1, Joahnna Paderna1, Anisa Valinia1, Pauline Williams1, Denise Signorelli2, and Patti Morley2. (1) Department of Physical Sciences, Community College of Southern Nevada, 6375 West Charleston Blvd., Las Vegas, NV 89146-1164, (2) Department of Biological Sciences, Community College of Southern Nevada, 6375 West Charleston Blvd., Las Vegas, NV 89146-1164
Medicinal plants have been employed by Native Americans throughout the southwest United States for centuries to combat and cure various ailments. This project concentrates on the following five commonly known plants found in the Nevada desert: Artemisia ludoviciana (sagebrush), Gutierrezia sarothae (snakeweed),Anemopsis californica (yerba mansa), Chilopsis linearis (desert willow), Krameria parvifolia (ratany), and Rhus trilobata (squaw bush).

Leaves and roots of each plant were dried followed by consecutive extractions with hexane, dichloromethane, and water. The water extract fraction of each plant was tested for its anti-microbial activity against a panel of skin pathogens. The panel included Proteus vulgaris, pseudomonas aeurginosa, Serratia marcescens, micrococcus luteus, and staphylococcus epidermidis. A negative control of each of the plant extracts, and iodine as a positive control was used for each test.

This study is a part of an undergraduate research program to encourage retention and carrier orientation to science students.