Abstract
A total of 156 soil samples collected from parts of Northern Nigeria were examined for heat-resistant fungi (HRF) which could cause spoilage of heat processed fruits and fruit products. Each sample was subjected to 70°C for 1 h before plating on potato sucrose agar. Approximately 77% of all the samples contained HRF which were identified as Neosartorya fischeri, N. fischeri var. spinosus, N. quadricincta and Aspergillus fischeri. Other HRF which occurred infrequently were Aspergillus fumigatus and Penicillium spp. The fungal counts in the positive samples generally ranged from 18–300 propagules/10g of soil.
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