INVESTIGADORES
POSE Graciela Noemi
artículos
Título:
Water activity and temperature effects on growth of Eurotium species isolated from animal feeds
Autor/es:
GRECO M.; PARDO A.; POSE G.; PATRIARCA A.
Revista:
REVISTA IBEROAMERICANA DE MICOLOGIA
Editorial:
ELSEVIER
Referencias:
Lugar: ESPAÑA; Año: 2018 vol. 35 p. 39 - 48
ISSN:
1130-1406
Resumen:
Growth of xerophilic fungi represents a relevant problem due to their ability to grow at low water activities causing spoilage of low and intermediate moisture foods, stored goods and animal feeds, with the consequent economic losses. The combined effect of water activity and temperature of four species of Eurotium isolated from animal feeds was investigated. E. amstelodami, E. chevalieri, E. repens and E. rubrum were grown at 5, 15, 25, 37 and 45˚C on Malt Extract Agar adjusted with glycerol in the range of water activities from 0.710-0.993. The cardinal model proposed by Rosso and Robinson (2001) was applied to fit growth data, taking into account water activity as factor at fixed temperatures, obtaining three cardinal water activities (awmin, awmax, awopt) and the specific growth rate at the optimum aw (µopt). A probabilistic model was also applied to define the interface between growth and no-growth. The model of Rosso gave a good quality fit for the experimental data. Probabilistic model showed a good performance to fit growth/no- growth cases in the predicted range. The results presented here could be applied to predict Eurotium species growth in feed matrices.