Artículo de revista
EFFECT OF SUBCLINICAL MASTITIS ON THE PHYSICOCHEMICAL QUALITY OF BOVINE MILK
Efecto de la mastitis subclínica sobre la calidad físico-química de la leche bovina
Registro en:
Calderón Rangel, A., Arteaga Márquez, M., Rodriguez Rodriguez, V., Arrieta Bernate, G., & Vergara Garay, O. (2014). Efecto de la mastitis subclínica sobre la calidad físico-química de la leche bovina. Revista Científica, 24(5).
0798-2259
Autor
CALDERON, ALFONSO
ARTEAGA, MARGARITA
RODRÍGUEZ, VIRGINIA
ARRIETA, GERMÁN
VERGARA, OSCAR
Institución
Resumen
The bovine mastitis can be classified into clinical and subclinical,
according to presence or absence of clinical signs. In both
cases there is an increase of somatic cells (SC) being higher
for clinical mastitis. The purpose of this study was to determine
the effect of subclinical mastitis on physical and chemical
milk components in dual purpose systems (DP). Using a nonprobabilistic
sampling in six DP livestock enterprises in Monteria,
Cordoba (Colombia), a cross-sectional study was implemented.
By California mastitis test (CMT) were selected quarters
evaluated as CMT 3 to take samples, and quarters evaluated
as CMT 0, in the same cow, for control. The samples
were collected aseptically and were kept refrigerated until
processing. The physicochemical analysis was determined by
Biolac 60 equipment. The determination of casein was done
by spectrophotometry, and SC count by an optical and portable
cell counter. The evaluation of the physicochemical variables
and SC count were grouped into four phases (0-2
months, 2-4 months, 4-6 months and more of 6 months of lactation).
Milk with cell count less than 250,000 was defined as
without subclinical mastitis and with subclinical mastitis when
cell count was greater than or equal to 250,000 SC/mL. The
averages for total protein for milk with high and low SC counts
were 2.93 ± 0.13 and 3.12 ± 0.13, respectively. For fat percentage,
averages were 3.36 ± 0.29 for high count milks SC and 3.70 ± 0.46 for milk with low count of SC. Overall, milk with
high counts of SC, the chemicals components decreased significantly
(P 0.05) compared to the low count of cells.