Evaluation of Microbiological Quality in Expired and Non-expired Dairy Canned Food Products Sold from Samaru Market, Zaria, Northwest Nigeria

The aims of this study is to investigate the microbiological quality of expired and non-expired dairy canned foods product and to provide information on human health risk associated with various type of microbes found in canned food and suggest possible method of controlling the risks. Five different types of can foods product were purchase from Samaru market; the samples were collected in labeled sterile plastic bags and transported to the Laboratory for analysis. Twelve fungal species were isolated during the period of study while five fungal species were isolated from expired canned foods product and seven fungal species were isolated from non-expired canned foods product. The isolated fungal species are Aspergillus flavus, Aspergillus niger, Aspergillus clavatus, Trichophyton rubrum, Microsporum ferrugineum, Rhodotorula spp, Madurella grisea, Sporoboromyces salmonicolor, Penicillium spp, Curvularia spp, Microsporum nanum and Coccidioides immitis. The highest fungal mean density was recorded in baked beans, tomatoes, fish and milk from expired canned foods product compared with non-expired canned food products except for sweet corn with the highest fungal mean density. Fish, tomatoes, sweet corn contributed 25% of the total fungal isolated in expired canned food product followed by milk (14%) and baked beans (11%) while baked beans had 31%, evaporated milk and tinned tomatoes contributed 23% followed by fish 15% and sweet corn (8%). The fungal species identified during this study are foodborne pathogens that are potential health hazards for consumption, cause diseases in humans and animals that may be bloody.

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