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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2164

Authors: Deresse, Daka
Advisors: Dr. Solomon Gebre-Selassie
Keywords: milk
bacterial plate count,
milk hygiene,
raw milk,
pasteurized milk
antibiotic sensitivity.
Copyright: May-2011
Date Added: 3-May-2012
Abstract: Abstract Modern dairy processing is a recent phenomenon in Ethiopia for the very reason that the country has not been producing enough milk at commercial scale. The establishment of state owned and private dairy farms in big cities resulted in the realization of the few dairy processing plants. In addition to poor transport system and infrastructure of the country, the dairy processing plants are located far away from farms. This is further aggravated by other facts like poor dairy management, poor milking hygiene and lack of good milk cooling and transport facilities and therefore the quality of milk is greatly depreciated by the time it arrives to processing plants. Thus, the specific objectives of the study are to assess the bacteriological quality of raw milk from the farm to the processing plant, to determine the bacteriological quality of pasteurized milk, to identify public health important bacteria from the raw and pasteurized milk and to identify the critical control points through the milk collection and processing practices. The study was conducted mainly bacteriological quality tests and bacteriological isolation and identification of sampled milk at different points before pasteurization and at different time points of pasteurized milk and subordinately used questionnaire. Detailed microbiological analysis was carried out on selected pathogens of public health importance. For selection of the samples, simple random sampling technique was used. The data to be generated from the questionnaire and the laboratory tests were summarized and analyzed using appropriate descriptive and analytical statistics. As the result of the study showing that 326 bacterial strains were isolated from CCP1 up to CCP6. There was different species of bacteria in different HACCP levels of milk. In CCP1, there were 51 bacteria of different species and in CCP2, CCP3, CCP4, CCP5 and CCP6, was 64, 73, 80, 20, and 38 respectively. The predominant bacteria species in all (CCP1-CCP5) levels of the milk was S. aureus which accounts 14(27.5%), 20(31.3%), 21(28.8%), 17(21.3%), and 6(30.0%) respectively. In line with this the remedial solution for aforementioned identified findings the effective drugs was Ciprofloxacin, Gentamycin, TMP-SMZ, and Ceftriaxone, whereas, Ampicillin and Penicillin were resistant for many of
URI: http://hdl.handle.net/123456789/2164
Appears in:Thesis - Medical Microbiology

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