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J Vet Sci. 2007 Sep;8(3):237-242 |
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Effect of mastitis on raw milk compositional quality
Henry Ogola, Anakalo Shitandi*, Jackin Nanua |
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Guildford Institute, Egerton University, P. O. Box 536, Egerton, 20115, Kenya
* anakalos@gmail.com |
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In this study, we investigated the impact of mastitis
infection on the quality of milk composition in small-scale
dairy bovine herds. The purpose of this study was to find
a milk quality somatic cell count (SCC) standard that
could be used as an integral component of a control
program. In all, 396 quarter milk samples from lactating
cross-bred cows (Holstein & Zebu) were analyzed; 56% of
these quarters were experiencing intramammary infection,
with an overall mean SCC of 5.46 × 105 ± 2.30 × 104cells/
ml. Infected quarters had significantly (p < 0.05) higher
mean SCC levels (6.19 × 105± 4.40 × 104cells/ml) compared
to healthy quarters (2.65 × 105 ± 2.40 × 104cells/ml). In
high SCC milk and infected quarters, the concentrations
of non-casein fractions, sodium, chloride, and free fatty
acid were higher (p < 0.05), while the casein content,
lactose, casein-to-total protein, potassium, and calcium
were lower (p < 0.05) compared to normal quarters. These
findings suggest a mean SCC threshold limit of 5.46 × 105
cells/ml for the region. It was concluded that the results
could be used to propose a milk quality SCC standard that
can be used as an integral component of a control program.
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