title: New additive for culture media for rapid identification of aflatoxin-producing Aspergillus strains.
abstract: A new reliable, fast, and simple method for the detection of aflatoxigenic Aspergillus strains, consisting of the addition of a cyclodextrin (a methylated beta-cyclodextrin derivative) to common media used for testing mycotoxin production ability, was developed. We propose the use of this compound as an additive for fungal culture media to enhance the natural fluorescence of aflatoxins. The production of aflatoxins coincided with the presence of a bright blue or blue-green fluorescent area surrounding colonies when observed under long-wavelength (365-nm) UV light after 3 days of incubation at 28 degrees C. The presence of aflatoxins was confirmed by extracting the medium with chloroform and examining the extracts by high-pressure liquid chromatography with fluorescence detection.
authors.affiliation: Laboratorio de Higiene e Inspección de Alimentos, Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain. cfente@correo.lugo.usc.es
authors.forename: C A
authors.initials: CA
authors.lastname: Fente
authors.forename: J J
authors.initials: JJ
authors.lastname: Ordaz
authors.forename: B I
authors.initials: BI
authors.lastname: Vázquez
authors.forename: C M
authors.initials: CM
authors.lastname: Franco
authors.forename: A
authors.initials: A
authors.lastname: Cepeda
mesh_terms: D000348:Aflatoxins / Q000096:biosynthesis*; D001230:Aspergillus / Q000145:classification* / Q000254:growth & development* / Q000378:metabolism; D003470:Culture Media / Q000737:chemistry; D003505:Cyclodextrins / Q000378:metabolism*; D016533:Mycological Typing Techniques
chemical_list: D000348:Aflatoxins; D003470:Culture Media; D003505:Cyclodextrins