Year 2024, Volume 9, Issue 2
| Year : | 2024 |
| Volume : | 9 |
| Issue : | 2 |
| Authors : | Nassima BOUHROUM, EL Hassen LANKRI |
| Title : | RELATIONSHIP BETWEEN CERTAIN ANIMAL WELFAR PARAMETERS AND THE PHYSICO-CHEMICAL AND MICROBIOLOGICAL QUALITY OF MILK |
| Abstract : | In Algeria, dairy farms face a major problem related to poor management of animal welfare, which leads to a decline in milk production in terms of quality and quantity. The objective of this study was to verify whether there is a link between animal welfare parameters and milk quality. The experiment was carried out at two dairy farms in the wilaya of Chlef on a staff of 30 dairy cows of Prim Holstein and Montbéliard breed. These females were followed after calving by sampling milk and evaluating mastication index, rumen filling, dung consistency and udder cleanliness at day 7 and day 14. Milk samples were transported in a cooler for physicochemical analysis by measuring fat, total dry extract, degreased dry matter, pH, titratable acidity, density, conductivity and acidity of fat. The isolation of coliforms was carried out to verify the hygienic quality of milk. The results showed that with a cleanliness score equal to (2,33 ; 2,4) during the cold and hot season respectively the hygienic quality of the milk was unsatisfactory with a conductivity of (7,75 ; 7,40) and number of coliform was (8,01- 8,86) × 103 UFC respectively with a p>0,05. The observed fluctuation in fat, total dry extract and degreased dry matter during the first and second week of the parturition at the rate of [(33,04; 24,14); (125; 120); (88,43; 85,76)] g/l with p<0,05 respectively was caused by subclinical mastitis thus excluding the dietary cause. Because the index of mastication, the filling of the rumen and the consistency of dung were in the range of the usual values at the rate of (52,82) m/min; (3); (3,4) respectively as well as the acidity of the fat at the rate of (0,48; 0,55) respectively with a p>0,05. In conclusion, the origin of subclinical mastitis was the poor hygienic condition of the udder, which led to contamination of the milk by coliform bacteria, resulting in a decrease in the physicochemical quality of the milk. |
| Keywords : | conductivity, milk quality, season, subclinical mastitis |
ISSN 2490-3434 (Printed)
ISSN 2490-3442 (Online)
ISSN 2490-3442 (Online)
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