Gamma radiation treatment of postharvest produce for <i>Salmonella enterica</i> reduction on baby carrot and grape tomato

Berrios-Rodriguez, Armarynette; Olanya, O. M.; Niemira, Brendan A.; Ukuku, Dike O.; Mukhopadhyay, Sudarsan; Orellana, Lynette E.

doi:10.1111/jfs.12951

Cited by 3 publications

(2 citation statements)

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“…After pathogen inoculations, produce was irradiated at 4 °C using a Lockheed-Georgia (Marietta, GA) cesium-137 selfcontained gamma radiation source as previously described (Niemira et al, 2005;Niemira & Boyd, 2013). Produce in stomacher bags with designated treatment was irradiated at the dosages of 0.25 to 1.0 kGy using methodology from previous research, but different pathogen/host combinations (Berrios-Rodriguez et al, 2022;Olanya et al, 2015).…”

Section: Gamma Radiation Effects On L Monocytogenes Survival On Carro...mentioning

confidence: 99%

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Gamma radiation effects on the survival and reduction of Listeria monocytogenes on carrot and tomato

et al. 2022

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Assessment of pathogen survival is important for food safety. Listeria monocytogenes causes significant produce and food contamination worldwide. The objective of this research was to assess survival and reduction of L. monocytogenes on postharvest carrot and tomato subjected to low-dose radiation at different storage temperatures and times. Radiation levels of 0, 0.25, 0.50, 0.75, and 1 kGy were applied on produce inoculated with L. monocytogenes. Gamma radiation reduced Listeria populations by 5.9 logs on carrot and 3.9 logs on tomato at 3 days of storage (5 °C), while reductions were 4.4 and 4.0 logs on carrot and tomato, respectively; at 7 storage days (5 °C). At 20 °C, Listeria reductions were 2.8 logs on carrot and 4.2 logs on tomato (3 storage days) and pathogen decreases were 2.2 logs on carrot and 2.9 logs on tomato (7 storage days). Although pathogen reductions by radiation treatment varied with storage temperatures and days, the linear decreases were significant as the dosage increased from 0.25 to 1.0 kGy, implying that treatments were efficacious for pathogen inactivation. As low dose gamma radiation (1 kGy) showed substantial reduction of Listeria monocytogenes on fresh carrot and tomato, thus, use of low dose low dose gamma radiation can improve the post-harvest safety of carrot and tomato.

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Section: Gamma Radiation Effects On L Monocytogenes Survival On Carro...mentioning

confidence: 99%

“…L. monocytogenes populations were enumerated on modified oxoid agar (MOX) selective medium (BBL) modified with supplements and incubated at 37 °C. The colony forming units from the plating media were recorded (Berrios-Rodriguez et al, 2022).…”

Section: Microbiological Evaluationsmentioning

confidence: 99%