Growth and Aflatoxin B1 biosynthesis rate of model Aspergillus flavus NRRL 3357 exposed to selected infrared wavelengths

Aflatoxin B1 (AFB1) is a highly toxic substance produced mainly by Aspergillus spp., which are known to contaminate wide variety of foods and feeds. The objective this study was understand the growth AFB1 production rate flavus NRRL 3357 investigate impact different infrared (IR) heat intensities on aflatoxin-producing potential A. flavus. Thirty healthy corn kernels were inoculated with 1 × 106 spores/mL spores incubated at 25 °C. Then, plate count, ergosterol, measured every 24 h. In another experiment, for h exposed IR heating durations. Afterward, IR-exposed additional 3 6 days (4 7 incubation in total), ergosterol concentrations measured. For non-IR flavus, highest concentration (32.2 ?g/g) observed after incubation. Treatment high duration resulted low concentrations. However, treatment (e.g., 1.86 kW/m2) 20 s (97.83 34.84 ?g/g, respectively). sublethal intensity may have increased grow produce AFB1. outcome will contribute enhance continual efforts mitigating contamination economically important grains.