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Abstract
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Article Information:
Microbial Screening and Lipid Peroxidation Status of Fermented (Yoghurt) Milk Samples Sold in Maiduguri Metropolis and Commonly Consumed in University of Maiduguri, Borno State, Nigeria
H.C.C. Maduka, C.E. Ugwu, A.A. Maduka, N.H. Hashidu and B.S. Gimba
Corresponding Author: C.E. Ugwu
Submitted: February 05, 2013
Accepted: March 03, 2013
Published: June 25, 2013 |
Abstract:
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Fermented milk products are produced and consumed as supplements to normal diet especially in the Northern Nigeria. They could be contaminated by microorganisms due to poor quality control, thereby increasing the risk of food borne diseases in the community. Microbial screening and lipid peroxidation studies were carried out on some fermented milk products consumed within the University of Maiduguri campus to determine their safety levels. A total of seventy two samples comprising six differently prepared yoghurts were used in the study. Various microbial media were prepared and samples analyzed by the streak plate method after inoculation at 30ºC for 24 h. Lipid peroxidation was also determined in the samples using standard biochemical methods. The results show the presence of Salmonella typhi, E. coli, Staphylococcus aureus and Staphylococcus epidemidis only in the locally prepared kindrimu yoghurt while fungi and mould were isolated in all the samples. Pseudomonas and Candida albicans were not isolated in all the samples. The malonaldehyde was significantly higher in samples A and E compared to samples B and C. The results show that samples (A, C, D) with high malondialdehyde values had corresponding low ascorbic acid level also. The results suggest that the locally fermented yoghurt (Kindrimu) samples screened were contaminated with some food borne pathogens. The samples examined all showed some degrees of peroxidation. The public health importance of these results was highlighted.
Key words: Lipid peroxidation, malonaldehyde, malondialdehyde, microbial, yoghurt, ,
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Cite this Reference:
H.C.C. Maduka, C.E. Ugwu, A.A. Maduka, N.H. Hashidu and B.S. Gimba, . Microbial Screening and Lipid Peroxidation Status of Fermented (Yoghurt) Milk Samples Sold in Maiduguri Metropolis and Commonly Consumed in University of Maiduguri, Borno State, Nigeria. British Journal of Dairy Sciences, (2): 14-21.
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ISSN (Online): 2044-2440
ISSN (Print): 2044-2432 |
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