Antimicrobial activity of marigold (Tagetes erecta), mulberry (Morus indica), and red shallot (Allium ascalonicum) extracts against Streptococcus agalactiae

Research Article

International Journal of One Health, 6(1): 56-60

https://doi.org/10.14202/IJOH.2020.56-60

Tanawadee Mekvimol¹, Gannika Poonthong¹, Chayanit Chaipunna¹, and Natapol Pumipuntu^1,2

1. One Health Research Unit, Faculty of Veterinary Sciences, Mahasarakham University, Maha Sarakham 44000, Thailand.
2. Office of Academic Affairs, Faculty of Veterinary Sciences, Mahasarakham University, Maha Sarakham 44000, Thailand.

Background and Aim: The increasing antimicrobial resistance with reduced susceptibility to antimicrobial drugs is becoming a major concern for both human and animal, which raises health morbidity and mortality rate of cases that cannot be treated by antibiotics. Nowadays, there are many efforts to minimize the misuse of antibiotics. This study evaluated the antimicrobial activity of the crude ethanolic extracts of three Thai herbs divided in four groups; petals of marigold (Tagetes erecta), mulberry leaves and root barks (Morus indica), and whole onions of red shallot (Allium ascalonicum) against Streptococcus agalactiae.

Materials and Methods: The antimicrobial activity of four groups of the crude extracts using absolute ethanol from three Thai herbs was tested against standard strains of S. agalactiae using the agar well diffusion method. The commercial antibiotics ceftriaxone and erythromycin were used as positive control standards to determine the sensitivity of S. agalactiae.

Results: The result showed that all four groups of Thai herbal extract had inhibitory activity against standard strains of S. agalactiae. The inhibitory concentration test values were obtained using the dilution test at 25, 50, and 75 mg/ml. The maximum antimicrobial activity against S. agalactiae was observed in the ethanolic extracts from red shallot extract, followed by leaves of mulberry, petals of marigold, and root barks of mulberry, respectively.

Conclusion: The results demonstrated that the crude extract of three Thai herbs had antimicrobial activity inhibiting the growth of S. agalactiae and suggesting that they may be useful in the treatment of S. agalactiae infections in humans and animals. Keywords: antimicrobial activity, ethanol extract, Streptococcus agalactiae, Thai herbal extracts.

Keywords: antimicrobial activity, ethanol extract, Streptococcus agalactiae, Thai herbal extracts.

How to cite this article: Mekvimol T, Poonthong G, Chaipunna C, Pumipuntu N (2020) Antimicrobial activity of marigold (Tagetes erecta), mulberry (Morus indica), and red shallot (Allium ascalonicum) extracts against Streptococcus agalactiae, Int. J. One Health, 6(1): 56-60.

Received: 11-02-2020 Accepted: 13-04-2020 Published online: 12-05-2020

Corresponding author: Natapol Pumipuntu E-mail: natapol.p@msu.ac.th

DOI: 10.14202/IJOH.2020.56-60

Copyright: Mekvimol, et al. This article is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.