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Abstract:

Background: Xerophilic fungi represent a serious problem due to their ability to grow at low water activities causing the spoiling of low and intermediate moisture foods, stored goods and animal feeds, with the consequent economic losses. Aims: The combined effect of water activity and temperature of four Eurotium species isolated from animal feeds was investigated. Methods: Eurotium amstelodami, Eurotium chevalieri, Eurotium repens and Eurotium rubrum were grown at 5, 15, 25, 37 and 45 °C on malt extract agar adjusted with glycerol in the range 0.710–0.993 of water activities. Results: The cardinal model proposed by Rosso and Robinson (2001) was applied to fit growth data, with the variable water activity 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 cardinal model provided an adequate estimation of the optimal aw to grow and the maximum growth rate. The probabilistic model showed a good performance to fit growth/no-growth cases in the predicted range. Conclusions: The results presented here could be applied to predict Eurotium species growth in animal feeds. © 2017 Asociación Española de Micología

Registro:

Documento: Artículo
Título:Effect of water activity and temperature on the growth of Eurotium species isolated from animal feeds
Autor:Greco, M.; Pardo, A.; Pose, G.; Patriarca, A.
Filiación:Laboratorio de Micología Molecular, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes (UNQ), Roque Sáenz Peña 352, Bernal, Buenos Aires B1876BXD, Argentina
Universidad Nacional de Río Negro (UNRN), Escuela de Producción, Tecnología y Medio Ambiente, Mitre 331, Villa Regina, Río Negro 8336, Argentina
Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Laboratorio de Microbiología de Alimentos, Ciudad Universitaria, Intendente Güiraldes 2160, Pabellón II, 3 PisoBuenos Aires C1428EGA, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
Palabras clave:Animal feeds; Eurotium; Growth; Temperature; Water activity; glycerol; water; animal food; Article; Aspergillus amstelodami; Aspergillus chevalieri; Aspergillus repens; Aspergillus ruber; controlled study; environmental factor; Eurotium; food spoilage; fungus growth; fungus isolation; Fusarium; germination; growth rate; mycelial growth; nonhuman; Penicillium; temperature; biological model; comparative study; Eurotium; food control; growth, development and aging; microbiology; species difference; temperature; Animal Feed; Eurotium; Food Microbiology; Models, Biological; Species Specificity; Temperature; Water
Año:2018
Volumen:35
Número:1
Página de inicio:39
Página de fin:48
DOI: http://dx.doi.org/10.1016/j.riam.2017.04.002
Título revista:Revista Iberoamericana de Micologia
Título revista abreviado:Rev. Iberoam. Micol.
ISSN:11301406
CODEN:RIBME
CAS:glycerol, 56-81-5; water, 7732-18-5; Water
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11301406_v35_n1_p39_Greco

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Citas:

---------- APA ----------
Greco, M., Pardo, A., Pose, G. & Patriarca, A. (2018) . Effect of water activity and temperature on the growth of Eurotium species isolated from animal feeds . Revista Iberoamericana de Micologia, 35(1), 39-48.
http://dx.doi.org/10.1016/j.riam.2017.04.002
---------- CHICAGO ----------
Greco, M., Pardo, A., Pose, G., Patriarca, A. "Effect of water activity and temperature on the growth of Eurotium species isolated from animal feeds " . Revista Iberoamericana de Micologia 35, no. 1 (2018) : 39-48.
http://dx.doi.org/10.1016/j.riam.2017.04.002
---------- MLA ----------
Greco, M., Pardo, A., Pose, G., Patriarca, A. "Effect of water activity and temperature on the growth of Eurotium species isolated from animal feeds " . Revista Iberoamericana de Micologia, vol. 35, no. 1, 2018, pp. 39-48.
http://dx.doi.org/10.1016/j.riam.2017.04.002
---------- VANCOUVER ----------
Greco, M., Pardo, A., Pose, G., Patriarca, A. Effect of water activity and temperature on the growth of Eurotium species isolated from animal feeds . Rev. Iberoam. Micol. 2018;35(1):39-48.
http://dx.doi.org/10.1016/j.riam.2017.04.002