Descrição
Milk from two different cow breeds, Barrosã and Frísia, was studied. Within the same breed five
and four milk samples were taken respectively for chemical and microbiological analysis.
The following chemical parameters were analysed in triplicate:
Total Fat, Fatty Acids Identification and Quantification, Protein, Casein, Albumin, Non-protein
Nitrogen, Vitamin A, Vitamin D, Phosphorus, Potassium, Sodium, Iron, Magnesium, Calcium, Ash, Total
solids, Lactic acid and Acidity.
In general terms milk from Barrosã breed showed higher values for all analysed parameters
except for Total Fat, Total Solids and Vitamin D.
Statistical analysis, by testing the chemical parameters all together using the Hotelling T2 test
showed that milk samples from the two cow breeds were significantly different (α=0,05).
Microbiological analysis (Total Viable Counts (30ºC), Escherichia coli, Staphylococcus
coagulase + and Listeria monocytogenes) was also performed. Staphylococcus coagulase + was found in
one milk sample from Barrosã breed. Listeria monocytogenes was found in two milk samples from Frísia
breed.
; Fernandes, Élia 
