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Survival of foodborne bacteria on strawberries and antibacterial activities of Hibiscus sabdariffa extracts and chemical sanitizers on strawberries
Author(s) -
GómezAldapa Carlos A.,
PortilloTorres Lizbeth A.,
VillagómezIbarra José R.,
RangelVargas Esmeralda,
TéllezJurado Alejandro,
CruzGálvez Andrés M.,
CastroRosas Javier
Publication year - 2018
Publication title -
journal of food safety
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.427
H-Index - 43
eISSN - 1745-4565
pISSN - 0149-6085
DOI - 10.1111/jfs.12378
Subject(s) - hibiscus sabdariffa , antimicrobial , pathogenic bacteria , food science , sodium hypochlorite , bacteria , calyx , listeria monocytogenes , hand sanitizer , microbiology and biotechnology , salmonella , biology , chemistry , horticulture , genetics , organic chemistry
The potential of 13 foodborne bacteria to attach and survival on strawberries and the antimicrobial activities of Hibiscus sabdariffa calyx extracts and chemical sanitizers against foodborne bacteria on strawberries were investigated. Strawberries were inoculated with thirteen foodborne bacteria: Listeria monocytogenes , Shigella flexneri , Staphylococcus aureus , Salmonella Typhimurium, S . Typhi, S . Montevideo, Vibrio cholerae O1, and six pathotypes of Escherichia coli : O157:H7, Non‐O157:H7‐Shiga toxin‐producing, enteropathogenic, enterotoxigenic, enteroinvasive, and enteroaggregative. The antibacterial effects of four roselle calyx extracts (in water, methanol, acetone, and ethyl acetate), sodium hypochlorite, colloidal silver, and acetic acid against all pathogenic bacteria were evaluated on contaminated strawberries. All foodborne bacteria attached and survived on strawberries at least 15 days. Acetonic and methanolic roselle calyx extracts caused a greater reduction in the concentration (until 3.8‐log 10 reduction in some cases) of all foodborne bacteria than the sodium hypochlorite, colloidal silver and acetic acid on contaminated strawberries. Practical applications The strawberry is an important crop in United States, Spain, and Mexico. However, fresh strawberries have been associated with foodborne disease caused by E. coli O157:H7 and Salmonella . There is little information about the attachment and survival of foodborne bacteria on strawberries. A number of studies have shown that chemical agents used to eliminate pathogenic bacteria on fruits have a limited antimicrobial effect. Roselle calyx extracts are reported to have an antimicrobial effect. This study provides information about the attachment and survival of different foodborne bacteria on strawberries and information on the significant impact of dry roselle calyx extracts may be potentially useful in disinfection procedures of strawberries.