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Apr 3, 2023Article Details
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Main Article Content
Comparison of the Contents of Calcium, Magnesium and some Environmental Microorganisms in Cow Feed and Raw Milk Produced in Cameroon
Abstract
A chemical and microbiological study was conducted on twelve dairy farms in the West Region of Cameroon (Central Africa) during the period 2019-2020. Two hundred and sixteen samples of drinking water, green fodder consumed by dairy cows and raw milk produced were analyzed. Calcium and Magnesium contents were assessed by volumetry and atomic absorption spectrometry methods. Lactobacilli, yeasts and molds were isolated on solid culture media by surface spreading techniques. The average Ca2+ concentrations were 42 mg/l, 1674 mg/kg and 1215 mg/l, in the drinking water, green fodder and milk produced respectively. That of Mg2+ was 26 mg/l, 1913 mg/kg and 160 mg/l respectively. The Ca2+ content of the raw milk produced was not significantly different (p>0.05) from that of the green fodder consumed by the cows. However, the drinking water had a significantly lower Ca2+ and Mg2+ content than the green fodder consumed and the raw milk produced (p<0.05). The average concentration of microorganisms in drinking water, green fodder and produced milk was 7.3x106 CFU/ml, 3.7x107 CFU/g and 1.6x107 CFU/ml for lactobacilli, 7.4x106 CFU/ml, 6.3x107 CFU/g and 1x107 CFU/ml for yeasts, and 1.7x104 CFU/ml, 5.7x105 CFU/g and 1.3x104 CFU/ml for molds respectively. The cell abundance dynamics of lactobacilli in green fodder consumed by the cows was not significantly different from that in the milk produced (p>0.05). Similarly, the yeasts and molds abundance dynamics in the drinking water of the cows were not significantly different from those in the milk produced (p>0.05).
