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Addis Ababa University Libraries Electronic Thesis and Dissertations: AAU-ETD! >
Faculty of Science >
Thesis - Environmental Sciences >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/123456789/3306
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| Title: | MICROBIOLOGICAL SAFETY OF PASTEURIZED AND RAW MILK FROM MILK PROCESSING PLANTS IN AND AROUND ADDIS ABABA |
| Authors: | ABERRA, ASEFFA |
| Advisors: | Seyom Leta(Dr. ) |
| Keywords: | Aerobic Plate Count
E. coli
Fecal Coliforms
Pasteurization |
| Copyright: | Dec-2010 |
| Date Added: | 5-Jul-2012 |
| Publisher: | Addis Ababa University |
| Abstract: | Milk is one of the food products which is used as vehicle of disease transmission to
human being. This study was conducted to assess the quality of both raw and
pasteurized milk produced by the five major milk processing plants in and around Addis
Ababa.
A total of 48 samples were taken from the five plants and triplicate of testes were
conducted for each of them including tests for mycobacterium bovis and expressed in
terms of mean (average).The result indicated that aerobic plate count ranges from 3.5
x105 to 4.6x106 cfu/ml in raw milk and 1.2x104 to5.2x10 5 cfu/ml in pasteurized milk.
Escherichia coli which is used as indicator organism for the presence of pathogenic
organisms was present in all raw milk and only detected in two pasteurized milk from
plant B and plant E. It ranges from 4.33x104 cfu/ml to 5.37x105 cfu/ml in raw milk and 0
cfu/ml to 2.2x104 cfu/ml in pasteurized milk.
Fecal coli forms which is an indicator of poor hygienic condition during milk
handling ranged from 3.73x104cfu/ml to 6.67x105 cfu/ml in raw milk samples and 0
cfu/ml to 2.27x104 cfu/ml in pasteurized milk.
Staphylococcal organisms was also detected in one sample of raw milk from the three
plants and detected in two samples of pasteurized milk from the five milk processing
plants. The results from the five milk processing plants indicated that there are some
pasteurized milk found with bacterial load above the recommended value of 3-5
organisms/ml for coliform organisms by FMOH.From this result it is possible to
conclude that consuming raw milk can lead to different infections. |
| Description: | A Thesis submitted to School of Graduate Studies Addis Ababa
University, in partial fulfillment of the requirements for the
degree of Masters of Science in Environmental Science |
| URI: | http://hdl.handle.net/123456789/3306 |
| Appears in: | Thesis - Environmental Sciences
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