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Antibacterial effect of roselle extracts (Hibiscus sabadariffa), sodium hypochlorite and acetic acid against multidrug-resistant Salmonella strains isolated from tomatoes.
- Source :
-
Letters in applied microbiology [Lett Appl Microbiol] 2016 Feb; Vol. 62 (2), pp. 177-84. - Publication Year :
- 2016
-
Abstract
- Unlabelled: Antibiotic-resistant Salmonella strains were isolated from saladette and red round type tomatoes, and an analysis done of the antibacterial activity of roselle calyx extracts against any of the identified strains. One hundred saladette tomato samples and 100 red round tomato samples were collected from public markets. Each sample consisted of four whole tomatoes. Salmonella was isolated from the samples by conventional culture procedure. Susceptibility to 16 antibiotics was tested for the isolated Salmonella strains by standard test. The antibacterial effect of four roselle calyx extracts (water, methanol, acetone and ethyl acetate), sodium hypochlorite and acetic acid against antibiotic-resistant Salmonella isolates was evaluated on contaminated tomatoes. Twenty-four Salmonella strains were isolated from 12% of each tomato type. Identified Salmonella serotypes were Typhimurium and Typhi. All isolated strains exhibited resistance to at least three antibiotics and some to as many as 12. Over contaminated tomatoes, the roselle calyx extracts produced a greater reduction (2-2·6 log) in antibiotic-resistant Salmonella strain concentration than sodium hypochlorite and acetic acid.<br />Significance and Impact of the Study: The presence of multidrug-resistant Salmonella in vegetables is a significant public health concern. Multidrug-resistant Salmonella strains were isolated from raw tomatoes purchased in public markets in Mexico and challenged with roselle Hibiscus sabdariffa calyx extracts, sodium hypochlorite and acetic acid. On tomatoes, the extracts caused a greater reduction in the concentration of antibiotic-resistant Salmonella strains than sodium hypochlorite and acetic acid. Roselle calyx extracts are a potentially useful addition to disinfection procedures of raw tomatoes in the field, processing plants, restaurants and homes.<br /> (© 2015 The Society for Applied Microbiology.)
- Subjects :
- Anti-Bacterial Agents pharmacology
Disinfection methods
Drug Resistance, Multiple, Bacterial
Foodborne Diseases microbiology
Foodborne Diseases prevention & control
Mexico
Microbial Sensitivity Tests
Salmonella typhi isolation & purification
Salmonella typhimurium isolation & purification
Acetic Acid pharmacology
Disinfectants pharmacology
Hibiscus metabolism
Solanum lycopersicum microbiology
Plant Extracts pharmacology
Salmonella typhi drug effects
Salmonella typhimurium drug effects
Sodium Hypochlorite pharmacology
Subjects
Details
- Language :
- English
- ISSN :
- 1472-765X
- Volume :
- 62
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Letters in applied microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 26612600
- Full Text :
- https://doi.org/10.1111/lam.12528