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. 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.
journal_name
Lett Appl Microbioljournal_title
Letters in applied microbiologyauthors
Gutiérrez-Alcántara EJ,Rangel-Vargas E,Gómez-Aldapa CA,Falfan-Cortes RN,Rodríguez-Marín ML,Godínez-Oviedo A,Cortes-López H,Castro-Rosas Jdoi
10.1111/lam.12528subject
Has Abstractpub_date
2016-02-01 00:00:00pages
177-84issue
2eissn
0266-8254issn
1472-765Xjournal_volume
62pub_type
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journal_title:Letters in applied microbiology
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journal_title:Letters in applied microbiology
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doi:10.1046/j.1472-765x.1998.00319.x
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pub_type: 杂志文章
doi:10.1111/j.1472-765x.1996.tb01198.x
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journal_title:Letters in applied microbiology
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doi:10.1046/j.1472-765x.2003.01378.x
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journal_title:Letters in applied microbiology
pub_type: 杂志文章
doi:10.1046/j.1472-765x.1998.00306.x
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更新日期:2008-12-01 00:00:00
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journal_title:Letters in applied microbiology
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更新日期:2003-01-01 00:00:00
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pub_type: 杂志文章
doi:10.1111/j.1472-765X.2008.02372.x
更新日期:2008-07-01 00:00:00