Microbial Quality Assessment of Some Branded yoghurts Sold in Onitsha North local Government Area of Anambra State, Nigeria

Onuorah Samuel and Obika Ifeanyi

Abstract


The microbial quality assessment of some branded yoghurts sold in Onitsha North Local Government Area of Anambra State, Nigeria was carried out to determine their suitability for human consumption. The total bacterial, total coliform, total fungal and pH of the samples were determined using standard methods. The total bacterial count ranged between 1.0x103 cfu/ml and 4.5 x 103 cfu/ml, total coliform count between 0.1 x 103 cfu/ml and 0.8 x 103 cfu/ml, total fungal count between 0.2 x 103 cfu/ml and 0.9 x 103 cfu/ml  while the pH ranged between 5.0 and 5.8. The microbial isolates were Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi, Bacillus subtilis, Klebsiella aerogenes, Lactobacillus plantarum, Geotrichum candidum, Fusarium oxysporium, Penicillium digitatum, Aspergillus flavus, Rhizopus stolonifer and Mucor mucedo. Staphylococcus aureus and Aspergillus flavus were the most predominant among the bacterial and fungal isolates respectively. The microbial isolates are known to produce toxins and metabolites that are injurious to human health, therefore the attention of the relevant government agencies and manufacturers of yoghurt is needed to ensure that the product is produced, packaged, stored and marketed under adequate hygienic conditions to minimize its contamination and the health risk posed to the consumers.

Keywords: Microbial Quality, Assessment, Branded Yoghurts, Onitsha North, Nigeria.


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