Antimicrobial Activity of (avocado) Leaf Extracts Against Staphylococcus Aureus, Escherichia Coli and Salmonella Specie
Student: Agnes Ajunwa (Project, 2025)
Department of Science Laboratory Technology
Benue State Polytechnic, Ugbokolo, Benue State
Abstract
This study investigates the antimicrobial activity of Persea americana (avocado) leaf extracts against three pathogenic bacteria: Staphylococcus aureus, Escherichia coli, and Salmonella species. Aqueous and ethanolic extracts of avocado leaves were prepared and tested for their antimicrobial effects using the agar well diffusion method. The results showed that the aqueous extract exhibited significant antimicrobial activity, particularly against Escherichia coli (4.00 mm) and Salmonella species (6.00 mm), while no inhibition was observed against Staphylococcus aureus. The ethanolic extract did not show any noticeable antimicrobial activity against the tested bacteria. Control groups (water and ethanol) did not demonstrate any antimicrobial effects. The findings suggest that Persea americana leaf extracts, particularly the aqueous extract, possess antimicrobial properties and may serve as a potential natural alternative in the fight against bacterial infections, especially those caused by Gram-negative bacteria. However, further research is needed to identify the active compounds responsible for these effects and to assess their safety and efficacy in clinical settings.
Keywords
For the full publication, please contact the author directly at: elaigwudaniel2025@gmail.com
Filters
Institutions
- Covenant Polytechnic, Aba, Abia State 1
- Covenant University, Canaan Land, Ota, Ogun State 4
- Crawford University of Apostolic Faith Mission Faith City, Igbesa, Ogun State 2
- Crescent University, Abeokuta, Ogun State 1
- Cross Rivers University of Technology, Calabar, Cross Rivers State 142
- Delta State Polytechnic, Ogwashi-Uku, Delta State 11
- Delta State Polytechnic, Otefe, Delta State 12
- Delta State University, Abraka, Delta State 138
- Ebonyi State University, Abakaliki, Ebonyi State 17
- Edo University, Iyamho, Edo State 10