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- Title
Use of the CMT and somatic cell counter® test to evaluate quality of cow milk in tank.
- Authors
Bucio-Galindo, Adolfo; Castañeda-Vázquez, Hugo; Izquierdo-Reyes, Francisco
- Abstract
Objective: evaluate whether California mastitis test (CMT) values for bulk milk depend on its somatic cell content. Evaluate if the composition of the milk changes as a function of the number of somatic cells. Design/methodology/approach: 48 samples of bulk milk from different dairy farms and cheese factories in Tabasco, Mexico were taken randomly. Measured parameters were: California Mastitis Test (CMT), the somatic cell count (CCS), fat, protein, non-fat solids, lactose. The values of CCS were grouped in 3 intervals: (ƒ?500,000), (ƒ®500,000-1,000,000), (ƒ®1,000,000) to be compared with qualitative data of CMT (0, 1, 2) in a two-way contingency table. Milk samples were also grouped in 4 categories according to their number of somatic cells A (0-250,000), B (ƒ®251,000-500,000), C (ƒ®500,000- 750,000) y D (ƒ®750,000) to compare fat, protein, non-fat solids, lactose by one-way ANOVA and Tukey test at a 5% confidence level. Results: the CMT values were dependent on its somatic cells content intervals; (x2ƒ?88.1, pƒ?0.05). A lower amount of non-fat solids, lactose and protein was observed in the group D, with highest category of somatic cells (p„T0.05). Limitations on study/implications: the CMT test depend on the somatic cell content in cow¡?s bulk milk. Milk with high somatic cell content had less non-fat solids, and less lactose. Findings/conclusions: the CMT have been traditionally used to assess the udder¡?s health of individual cows; in this research, we validate to use CMT to assess bulk milk samples. Samples with high somatic cell content had less non-fat solids, less lactose and less protein.
- Subjects
SOMATIC cells; MILK quality; MILKING; RAW milk; COMPOSITION of milk; FACTORY farms; MILK
- Publication
Agro Productividad, 2020, Vol 13, Issue 4, p79
- ISSN
2448-7546
- Publication type
Article
- DOI
10.32854/agrop.vi.1619