Influence of Listeria monocytogenes and environmental abiotic factors on growth parameters and aflatoxin B1 production by Aspergillus flavus |
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| Affiliation: | 1. Departamento de Microbiología e Inmunología, Universidad Nacional de Río Cuarto, Ruta 36 Km. 601, 5800 Río Cuarto, Córdoba, Argentina;2. Fellow of Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina;3. Member of Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Argentina;1. Institute for Infrastructure Engineering, University of Western Sydney, Penrith, NSW 2751, Australia;2. Camden Council, Camden, NSW 2570, Australia;1. Materials Science and Engineering, University of California San Diego, La Jolla, CA 92093, USA;2. Department of Bioengineering, University of California San Diego, La Jolla, CA 92093, USA;3. Department of Nanoengineering, University of California San Diego, La Jolla, CA 92093, USA;4. Department of Molecular Biotechnology, Chonnam National University, Gwangju 500-757, South Korea;1. Material Science Innovation and Modelling (MaSIM) Research Focus Area, Faculty of Agriculture, Science and Technology, North-West University (Mafikeng Campus), Private Bag X2046, Mmabatho, South Africa;2. Department of Chemistry, School of Mathematical and Physical Sciences, Faculty of Agriculture, Science and Technology, North-West University (Mafikeng Campus), Private Bag X2046, Mmabatho 2735, South Africa;3. Department of Chemistry, Federal University, Ndufu-Alike Ikwo, P.M.B 1010 Abakaliki, Ebonyi State, Nigeria;4. Electrochemistry for Energy & Environment Group, Research Focus Area: Chemical Resource Beneficiation (CRB), North-West University, Private Bag X6001, Potchefstroom, South Africa;5. Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, Afe Babalola University, Ado Ekiti, Ekiti State, Nigeria;6. Department of Chemistry, Nelson Mandela Metropolitan University, P.O. Box 77000, Port Elizabeth 6031, South Africa;1. Departamento de Química y Ciencia de los Materiales, Facultad de Ciencias Experimentales, Universidad de Huelva, Campus de El Carmen, P.O. Box 21007 Huelva, Spain;2. Centre for Analysis and Synthesis, Lund University, P.O. Box 124, 221 00 Lund, Sweden;1. Department of Oral and Maxillofacial and Facial Plastic Surgery, Martin-Luther-University Halle-Wittenberg (Head: Prof. Dr. Dr. A.W. Eckert), Ernst-Grube-Straße 40, 06120 Halle, Germany;2. Department of Neurosurgery, Martin-Luther-University Halle-Wittenberg (Head: Prof. Dr. C. Strauss), Ernst-Grube-Straße 40, 06120 Halle, Germany;3. Petersberg, 06193 Halle, Germany;4. Department of Human Genetics, Martin-Luther-University Halle-Wittenberg (Head: Prof. Dr. K. Hoffmann), Magdeburger Straße 2, 06112 Halle, Germany;1. State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China;2. College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China |
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| Abstract: | Aspergillus flavus growth is influenced by a variety of abiotic factors including water activity (aW), pH, redox potential, relative humidity, temperature and availability of oxygen. Furthermore, biotic factors such as the presence in the same habitat of different microorganisms can develop ecological interactions between them that are positive, negative or indifferent for fungal growth. The aim of the present work was evaluate the effect of Listeria monocytogenes in interaction with aW, pH and temperature on the lag phase, growth rate and AFB1 production of A. flavus. Ecophysiological in vitro studies of A. flavus demonstrate that the co-occurrence with L. monocytogenes in culture medium and abiotic factors (aW, pH and temperature) influence the growth of the fungal strains and the production of AFB1. The presence of L. monocytogenes generally decreased fungal growth and increased significantly aflatoxin production. These studies are essential in the prediction of contamination risk of food with these microorganisms or their toxins in interaction with several environmental parameters. |
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| Keywords: | Growth parameters Abiotic factors |
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