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The antibacterial effects of Allium cepa (onion) crude bulb extract on Escherichia coli ATCC#25922.

Author

Regina Ann R. Añora,
Jamie Carmel R. Garaña,
Marc Frederick M. Lim,
Althea Leana  O. Mandal,
Almira B. Panilag,
Ma. Lourdes Umlas

Related Institution

College of Arts and Sciences – Department of Biology - Cebu Doctors' University

Publication Information

Publication Type
Thesis/Dissertations
Thesis Degree
BS
Specialization
Biology
Publication Date
March 2019

Abstract

   The purpose of this study was to determine if Allium cepa exhibited antimicrobial activity against Escherichia coli. This study was conducted in Cebu Doctor's University's Research Lab in Mandaue City, Cebu. There were four (4) treatment groups: a positive control (Ciprofloxacin), a negative control (Ethanol), 50% concentration of Allium cepa crude bulb extract, and 100% concentration of Allium cepa crude bulb extract.


   Using Kirby Bauer Method, the four treatment groups were tested against Escherichia coli in Mueller-Hinton agar. After 48 hours of incubation in an autoclave, only the positive control (Ciprofloxacin) yielded an average zone of inhibition of 37.06mm, which means Escherichia coli was susceptible to the antibiotic. No zone of inhibition appeared on both experimental groups which are the 50% Allium cepa crude bulb extract and 100% Allium cepa crude bulb extract. Expectedly, our negative treatment group exhibited no extent of antimicrobial properties.


   The researchers concluded that Allium cepa is not an effective antimicrobial agent against Escherichia coli. In the interest of future studies, researchers recommend identification of the active ingredient in Allium cepa that gives it its antimicrobial propertiesand also to other plants of Alliiaceae family that are abundant in the Philippines to improve the arsenal of plants that have antimicrobial properties and are available in the country, andutilizing bacteria other than Escherichia coli, to be tested with Allium cepa to test its antimicrobial potential.

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Physical Location

LocationLocation CodeAvailable FormatAvailability
Cebu Doctors' University - Main Library U1 An87 2019 Fulltext Print Format

 
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