Invertase production of common storage moulds in food and feed grains as apossibility for rapid detection of aspergillus flavus group and Aspergillus fumigatus

Authors
Matrai, T Mayer, S Kokai, S Salamon, I
Citation
T. Matrai et al., Invertase production of common storage moulds in food and feed grains as apossibility for rapid detection of aspergillus flavus group and Aspergillus fumigatus, INT J F MIC, 61(2-3), 2000, pp. 187-191
Citations number
8
Categorie Soggetti
Food Science/Nutrition
Journal title
INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
ISSN journal
01681605 → ACNP
Volume
61
Issue
2-3
Year of publication
2000
Pages
187 - 191
Database
ISI
SICI code
0168-1605(20001101)61:2-3<187:IPOCSM>2.0.ZU;2-5
Abstract
Invertase production of grain storage moulds was studied. Aspergillus spp. and Penicillin spp. were grown in a sucrose based liquid medium, at 37 degr eesC. The A. flavus group (A. flavus, A. parasiticus, A. nomius, A. oryzae) and A. fumigatus showed a fast growth and intense invertase activity, whil e other Aspergillus spp. and Penicillium spp. grew slower and produced less invertase. The pattern of accumulated reducing sugar after 20 and 48 h of incubation was characteristic to the species studied. From inoculation stud ies the detection limit was calculated as: 1-10 conidia of A. flavus group and A. fumigatus, as compared to 10(3)-10(4) for the other species studied. The method may be recommended as a rapid test for the detection of A. flav us group and A. fumigatus in food and feed grains. (C) 2000 Elsevier Scienc e B.V. All rights reserved.