Invertase production of common storage moulds in food and feed grains as a possibility for rapid detection of Aspergillus flavus group and Aspergillus fumigatus |
| |
Authors: | Mátrai T Mayer S Kókai S Salamon I |
| |
Affiliation: | Research Institute for Animal Breeding and Nutrition, Gesztenyés, Hungary. |
| |
Abstract: | Invertase production of grain storage moulds was studied. Aspergillus spp. and Penicillium spp. were grown in a sucrose based liquid medium, at 37 degrees C. The A. flavus group (A. flavus, A. parasiticus, A. nomius, A. oryzae) and A. fumigatus showed a fast growth and intense invertase activity, while 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 studies 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. flavus group and A. fumigatus in food and feed grains. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|