Susceptibility of pESI positive Salmonella to treatment with biocide chemicals approved for use in poultry meat processing as compared to Salmonella without the pESI plasmid

Salmonella is a common cause of human foodborne illness, which is frequently associated with consumption of contaminated or undercooked poultry meat. Serotype Infantis is among the most common serotypes isolated from poultry meat products globally. Isolates of serotype Infantis carrying the pESI pla...

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Bibliographic Details
Published in:Letters in applied microbiology 2024-07, Vol.77 (7)
Main Authors: McMillan, Elizabeth A, Adams, Eric S, Mitchell, Trevor R, Hawkins, Jaci A, Read, Quentin D, Pokoo-Aikins, Anthony, Berrang, Mark E, Harris, Caitlin E, Hughes, Michael D, Glenn, Anthony E, Meinersmann, Richard J
Format: Article
Language:English
Subjects:
Animals
Calcium Compounds - pharmacology
Cetylpyridinium - pharmacology
Disinfectants - pharmacology
Food Handling
Food Microbiology
Humans
Microbial Sensitivity Tests
Peracetic Acid - pharmacology
Plasmids - genetics
Poultry - microbiology
Salmonella - drug effects
Salmonella - genetics
Sodium Hypochlorite - pharmacology
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Summary:Salmonella is a common cause of human foodborne illness, which is frequently associated with consumption of contaminated or undercooked poultry meat. Serotype Infantis is among the most common serotypes isolated from poultry meat products globally. Isolates of serotype Infantis carrying the pESI plasmid, the most dominant strain of Infantis, have been shown to exhibit oxidizer tolerance. Therefore, 16 strains of Salmonella with and without pESI carriage were investigated for susceptibility to biocide chemical processing aids approved for use in US poultry meat processing: peracetic acid (PAA), cetylpyridinium chloride (CPC), calcium hypochlorite, and sodium hypochlorite. Strains were exposed for 15 s to simulate spray application and 90 min to simulate application in an immersion chiller. All strains tested were susceptible to all concentrations of PAA, CPC, and sodium hypochlorite when applied for 90 min. When CPC, calcium hypochlorite, and sodium hypochlorite were applied for 15 s to simulate spray time, strains responded similarly to each other. However, strains responded variably to exposure to PAA. The variation was not statistically significant and appears unrelated to pESI carriage. Results highlight the necessity of testing biocide susceptibility in the presence of organic material and in relevant in situ applications.
ISSN:1472-765X
1472-765X
DOI:10.1093/lambio/ovae067