Comparative analysis of microbial quality and safety of raw cow milk in Andassa Livestock Research Center and Dairy cooperatives in Bahir Dar city, Bahirdar, Ethiopia, 2018

Comparative analysis of microbial quality and safety of raw cow milk in Andassa Livestock Research Center and Dairy cooperatives in Bahir Dar city, Bahirdar, Ethiopia, 2018

  • Dessalegn Alehegn Lecturer, Department of Biology, Gambella University, Ethiopia
  • Dr. Baye Sitotaw Department of Biology, Bahirdar University, Ethiopia
  • Prof. (Dr.) Pulluri Surender Reddy Professor of Public Health, Department of Biology, Gambella University, Ethiopia
Keywords: Microbial quality, Raw Milk.


Milk is an important source of nutrients to humans and animals. Because of its high water activity and nutritional value, it serves as an excellent medium for growth of many kinds of microorganisms under suitable conditions. This study deals with comparative analysis of the microbiological quality and safety of raw cow milk samples from Andassa Livestock Research Center (ALRC) and Bahirdar Dairy Cooperatives (BDDC). A total of 60 samples (30 from each site) of raw cows’ milk were collected. 200ml of raw milk sample were taken aseptically from mixing container for quantification of Aerobic Mesophilic Bacteria (AMB), Staphylococcus aureus, Total Coliform (TC), Fecal Coliform (FC) and Yeasts and Moulds. Isolation of Brucella and Salmonella was conducted in all samples. The mean values of the five quality parameters in the milk samples of both sites were: AMBC (ALRC,7.47±0.06; BDDC,6.97±0.4logcfu/ml), S.aureus (ALRC, 5.30±0.13log10cfu/ml; BDDC, 4.75±0.46log10cfu/m), TC (ALRC, 2.94±0.23logMPN/ml; BDDC,2.43±0.53logMPN/ml) ,FC (ALRC,1.80±0.69logMPN/ml;  BDDC,1.18±0.40logMPN/ml) and Yeast and Mould (ALRC, 6.41±0.084 log10cfu/ml; BDDC, 5.13±0.19log10cfu/ml). From the 60 samples, Brucella was detected in 19(31.6%) samples (ALRC, 8(26.6%); BDDC, 11 (36.6%)) and Salmonella was detected in 10(16.6%) samples (ALRC 6 (20%); BDDC, 4 (13.3%)). The microbial quality of raw milk obtained from ALRC was significantly higher than (P = 0.00) the sample obtained from BDDC. All the parameters did not satisfy the WHO standards. A source of water for washing milk utensils (0.002), practice of washing hands (0.021), the frequency of barn cleaning (0.012) and frequency of washing milk utensils and collecting tanks (0.033) 


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How to Cite
Alehegn D, Sitotaw B, Reddy PS. Comparative analysis of microbial quality and safety of raw cow milk in Andassa Livestock Research Center and Dairy cooperatives in Bahir Dar city, Bahirdar, Ethiopia, 2018: Comparative analysis of microbial quality and safety of raw cow milk in Andassa Livestock Research Center and Dairy cooperatives in Bahir Dar city, Bahirdar, Ethiopia, 2018. Med. res. chronicles [Internet]. 2020Sep.7 [cited 2020Sep.24];7(4):177-9. Available from:
Original Research Article