H. K. Taligoola
Department of Botany, Faculty of Science, Makerere University, P.O. Box 7062, Uganda
M. A. Ismail
Department of Botany, Faculty of Science, Assiut University, P.O. Box 71516, Assiut, Egypt
S. K. Chebon
Moi High School-Kabarak, P.O. Box, 7049, Nakuru, Kenya
ABSTRACT
A comparative investigation was made for the natural fungal contamination of imported and locally grown milled rice grains. Twenty four samples of each type of rice were obtained from various market centers within and around Kampala capital city. Contaminating fungi were enumerated by direct plating method on two isolation media including dichloran rose-bengal chloramphenicol agar (DRBC) and dichloran 18% glycerol agar (DG18) media. The locally grown rice recorded a total of 62 species belonging to 34 genera while the imported rice had 61 species belonging to 31 genera, on both isolation media. The broadest species spectrum on both types of rice grains were from the genera Aspergillus, Penicillium, Eurotium followed by Fusarium, Cladosporium and Cochliobolus. Both types of rice grains were predominantly contaminated by Aspergillus candidus, A. flavus, A. niger, Eurotium amstelodami, E. rubrum, Penicillium citrinum, P.oxalicum and Talaromyces spp. on the two isolation media used. The incidence levels of xerophilic fungi especially A.candidus and Eurotium spp. were however, comparatively higher on the imported rice than the local rice. Field fungi including Acremonium strictum, Fusarium moniliforme, F. solani, Scytalidium lignicola and Trichorderma harzianum occurred only on the local rice while xerophilic fungi including Aspergillus penicillioides, A. wentii, Eurotium repens and Paecilomyces lilacinus occurred only on the imported rice, on both isolation media. The imported rice grain samples recorded comparatively higher moisture contents than the local rice whereby 15.50% was the highest level for the import while for the local it was 14.60%. A half of the imported rice samples had moisture content above the recommended level for safe storage of milled rice while for the local rice only 12.5% of the samples moisture content were above this level.
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How to cite this article
H. K. Taligoola, M. A. Ismail and S. K. Chebon, 2004. Mycobiota Associated with Rice Grains Marketed in Uganda. Journal of Biological Sciences, 4: 271-278.
DOI: 10.3923/jbs.2004.271.278
URL: https://scialert.net/abstract/?doi=jbs.2004.271.278
DOI: 10.3923/jbs.2004.271.278
URL: https://scialert.net/abstract/?doi=jbs.2004.271.278
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