Factors affecting the microbiological quality and contamination of farm bulk milk by Staphylococcus aureus in dairy farms in Asella, Ethiopia
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Title |
Factors affecting the microbiological quality and contamination of farm bulk milk by Staphylococcus aureus in dairy farms in Asella, Ethiopia
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Creator |
Deddefo, A.
Mamo, G. Asfaw, M. Amenu, Kebede |
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Subject |
dairying
animal products milk food safety microbiology |
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Description |
Background The determination of the microbiological quality and safety of raw milk and the associated influencing factors at the farm level is very critical given that the quality or safety of subsequent products that are further produced depends on this. Therefore, this study aimed to determine the microbiological quality and safety of bulk milk and identify associated risk factors, and assess the presence/absence of S. aureus in bulk milk with potential contaminating sources in dairy farms in Asella, Ethiopia. Results The geometric means of bacterial counts in farm bulk milk were 5.25 log cfu/ml, 3.1 log cfu/ml and 2.97 log cfu/ml for total bacterial count (TBC), coliform count (CC) and coagulase-positive staphylococci count (CPS), respectively. Of the 50 dairy farms, 66, 88, and 32% had TBC, CC and CPS counts, respectively, that exceeded the standard international limits for raw cow’s milk intended for direct human consumption. TBC tended to increase as CC increased in bulk milk (r = 0.5). In the final regression model, increased TBC, CC and the contamination of farm bulk milk by S. aureus were significantly associated with dirty barns, dirty cows and soiled udder and teats. TBC was higher during the rainy season than during the dry season. The reported practice of washing teats with warm water significantly decreased CC and CPS. The occurrence of S. aureus was significantly (p |
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Date |
2023-03-07
2023-03-10T10:07:06Z 2023-03-10T10:07:06Z |
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Type |
Journal Article
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Identifier |
Deddefo, A., Mamo, G., Asfaw, M. and Amenu, K. 2023. Factors affecting the microbiological quality and contamination of farm bulk milk by Staphylococcus aureus in dairy farms in Asella, Ethiopia. BMC Microbiology 23: 65.
1471-2180 https://hdl.handle.net/10568/129268 https://doi.org/10.1186/s12866-022-02746-0 |
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Language |
en
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Rights |
CC-BY-4.0
Open Access |
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Format |
65
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Publisher |
Springer Science and Business Media LLC
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Source |
BMC Microbiology
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