Relationship between iron bioavailability and Salmonella Typhimurium fitness in raw and pasteurized liquid whole egg

Guillén, Silvia; Cebrián, Guillermo

doi:10.1016/j.fm.2022.104008

Cited by 4 publications

(1 citation statement)

References 51 publications

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“…in the intestine (Tan et al, 2021). Different studies have shown that iron bioavailability determines the growth rates of Salmonella cells in liquid eggs (Gast and Holt, 1995;Guillén and Cebrián, 2022). Furthermore, Cogan et al (2001) reported that iron in the form of ferrous sulfate promotes the growth of Gramnegative bacteria in eggs, and supplementation at levels of 35 mg/L in nonselective broth effectively promotes Salmonella isolation in raw eggs.…”

Section: Discussionmentioning

confidence: 99%

Salmonella spp. isolation from different types of egg samples and antimicrobial resistance of these strains in Argentina

2024

Ger. J. Microbiol.

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We studied the serovars present and the performance of two selective plating media, Hektoen enteric agar (HE) and Xylose-Lysine-Desoxycholate (XLD) agar, as well as the time of tetrathionate broth incubation (one and five days) used for Salmonella isolation in different samples of egg and egg packs collected from supermarkets in Argentina. We also determined the occurrence of bacterial growth inhibitors in egg content and the antibiotic resistance profile of the isolated strains. Salmonella spp. was detected in 29 samples (1.8%) from 1,643 different types of egg and egg pack samples analyzed. Eight serovars of Salmonella were isolated: S. ser. Typhimurium (ST), S. ser. Enteritidis (SE), S. ser. Agona, S. ser. Westhampton, S. ser. Brandenburg, S. ser. Gallinarum (biovar Gallinarum), S. ser. Muenchen, and S. ser. Montevideo. The most frequent were ST and SE; both were present in eggshells, yolk, and albumen. The increase in the incubation time in tetrathionate broth affected the isolation of Salmonella spp. from eggshell and pool of yolk and albumen with different values of relative sensitivity and accuracy (p<0.05). Furthermore, there was a significant difference between the two-plating media at the time of tetrathionate broth incubation in eggshell for the relative sensitivity (p<0.05). The agreement between XLD and HE agar in relation to the time of tetrathionate broth incubation depended on the type of samples studied. The occurrence of bacterial growth inhibitors in yolk and albumen depended on bacteria assayed. However, these were presented in yolk and albumen from the same pool of egg content. There were 2 and 8 different patterns of resistance among Salmonella strains isolated, and 87% of these strains were multidrug-resistant. It is necessary to understand the epidemiology of Salmonella from eggs and to alert public health to minimize the prevalence of antibiotic resistance of Salmonella spp. in Argentina.

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Section: Discussionmentioning

confidence: 99%

Salmonella spp. isolation from different types of egg samples and antimicrobial resistance of these strains in Argentina

2024

Ger. J. Microbiol.

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Microbial inactivation models of Salmonella Typhimurium in radio frequency treated eggs

Bermúdez‐Aguirre

Niemira

2023

Food Control

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Modeling quality changes and Salmonella Typhimurium growth in storage for eggs pasteurized by radio frequency treatments

Bermúdez‐Aguirre

Niemira

2023

Food Control

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Relationship between iron bioavailability and Salmonella Typhimurium fitness in raw and pasteurized liquid whole egg

Cited by 4 publications

References 51 publications

Salmonella spp. isolation from different types of egg samples and antimicrobial resistance of these strains in Argentina

Salmonella spp. isolation from different types of egg samples and antimicrobial resistance of these strains in Argentina

Microbial inactivation models of Salmonella Typhimurium in radio frequency treated eggs

Modeling quality changes and Salmonella Typhimurium growth in storage for eggs pasteurized by radio frequency treatments

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