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SURVIVAL OF Bacillus cereus LSPQ 2872 AND Escherichia coli O157:H7 UNDER GAMMA RADIATION MODELED WITH TSALLIS ENTROPY
SUPERVIVENCIA DE Bacillus cereus LSPQ 2872 Y Escherichia coli O157:H7 BAJO RADIACIÓN GAMMA MODELADA CON ENTROPÍA DE TSALLIS
DOI:
https://doi.org/10.15446/mo.n72.119468Keywords:
pathogen bacteria, survival fraction curve, Tsallis entropy, gamma radiation (en)bacterias patógenas, curva de fracción de supervivencia, entropía de Tsallis, radiación gamma (es)
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The objective was to model the survival of Bacillus cereus LSPQ 2872 and Escherichia coli O157:H7 exposed to gamma radiation, using Tsallis entropy and the Monte Carlo simulation method. Monte Carlo simulations were performed with a noise level of 0.05 to assess the sensitivity of the Tsallis entropy-based models (dose-proportional effect, linear-quadratic dose-effect relationship, and Sotolongo et al.). Random values were generated for the parameters (α, β, γ, D0, and D10) of the gamma irradiation effect. The dose-proportional effect, linear-quadratic dose-effect relationship, and Sotolongo et al. models showed a good fit to the survival data of Bacillus cereus and Escherichia coli exposed to radiation. For Bacillus cereus, the dose-proportional effect and linear-quadratic dose-effect models showed similar lethal doses (0.935 and 0.844 kGy), while the Sotolongo et al. model showed a lower lethal dose (0.406 kGy), indicating greater radiation efficacy. In Escherichia coli, the dose-proportional effect and linear-quadratic dose-effect models also showed similar lethal doses (0.716 and 0.745 kGy), and the Sotolongo et al. model showed a lower lethal dose (0.319 kGy), indicating greater efficacy. Tsallis entropy-based models are suitable for describing membrane behavior and biochemical changes in bacteria exposed to gamma radiation.
El objetivo fue modelar la supervivencia de Bacillus cereus LSPQ 2872 y Escherichia coli O157:H7 expuestas a radiación gamma, empleando la entropía de Tsallis y el método de simulación Monte Carlo. Se realizaron simulaciones de Monte Carlo con un nivel de ruido de 0,05 para evaluar la sensibilidad de los modelos basados en la entropía de Tsallis (efecto proporcional a la dosis, relación efecto-dosis de tipo lineal-cuadrática y Sotolongo et al.). Se generaron valores aleatorios para los parámetros (α, β, γ, D0 y D10) del efecto de la irradiación gamma. Los modelos de efecto proporcional a la dosis, relación efecto-dosis de tipo lineal-cuadrática y de Sotolongo et al. mostraron un buen ajuste a los datos de supervivencia de Bacillus cereus y Escherichia coli expuestos a radiación. Para Bacillus cereus, los modelos de efecto proporcional a la dosis y de relación dosis-efecto lineal-cuadrático mostraron dosis letales similares (0,935 y 0,844 kGy), mientras que el modelo de Sotolongo et al. mostró una dosis letal menor (0,406 kGy), lo que indica una mayor eficacia de la radiación. En Escherichia coli, los modelos de efecto proporcional a la dosis y de relación dosis-efecto lineal-cuadrático mostraron dosis letales también similares (0,716 y 0,745 kGy), y el modelo de Sotolongo et al. refleja una dosis letal menor (0,319 kGy), lo que indica una mayor eficacia. Los modelos basados en la entropía de Tsallis son adecuados para describir el comportamiento de la membrana y los cambios bioquímicos en bacterias expuestas a la radiación gamma.
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