Recuento de células somáticas y composición de leche de cabra, según nivel de producción y etapa de lactancia, en un plantel intensivo de la zona central de Chile

Abstract

Arch Med Vet 42, 79-85 (2010)ARTÍCULO SUMMARYThe aim of this study was to characterize milk yield, somatic cell count (SCC) and solids in goat milk according to level of milk yield and lactation period in an intensive dairy goat system. Twenty-five Saanen goats of parity 2, managed under the same conditions, were studied. Goats were assigned into two groups. Group A was defined as low milk yield (< 450 L/lactation) and Group B as high milk yield (> 550 L/lactation). Once a month, a milk yield control was conducted during the two milking periods. A milk sample was taken once a day during 10 months. Total protein, fat and lactose were assessed using a Milkoscan 133B. Somatic cell counts were determined using a Fossomatic 90. The outcome variables were compared between groups A and B. Results were analyzed by ANOVA and least square means were compared by Tuckey-test (P ≤ 0.05). Groups A and B produced 346 ± 64.9 L and 703 ± 209 L of milk, respectively. The average milk production by lactation period was similar for both groups. The highest levels of milk yield were reached between the second and fourth month of lactation. There was a tendency to higher levels of SCC in group B, however values remained within the normal levels reported in other studies. Milk fat, protein and total solids followed an inverse pattern in relation to the curve of milk yield. Lactose was stable through the entire lactation. Correlation between SCC and milk yield was moderate and negative. There was no relationship between SCC and milk solids. Milk yield and solids (protein and fat) had moderate and negative correlations.Palabras clave: recuento de células somáticas, leche caprina, composición láctea.

Relationships of conformation traits with somatic cell score in Nubian goats

“…The average of SCC was lower than the average of goats reported in the United States (570 × 10 3 cells/mL; Paape et al, 2007) and New Zealand (653 × 10 3 cells/mL; Apodaca-Sarabia et al, 2009), but greater than goats with low milk production from Chile (316 × 10 3 cells/mL; Marín et al, 2010). Milk production was higher than the yield of other Nubian goat populations (Bidot Fernández, 2013;Marín et al, 2010). Averages of points for type traits obtained in this study were similar to those obtained by Castañeda-Bustos et al (2017) for a set of different breeds of US dairy goats, except for FIS and UDE, which were higher (86.3 and 34.6 vs. 83.8 and 31.4 points, respectively), and lower for TDI and RUA (19.5 and 25.9 vs. 23 and 31.4,respectively).…”

“…The average of SCC was lower than the average of goats reported in the United States (570 × 10 3 cells/mL; Paape et al, 2007) and New Zealand (653 × 10 3 cells/mL; Apodaca-Sarabia et al, 2009), but greater than goats with low milk production from Chile (316 × 10 3 cells/mL; Marín et al, 2010). Milk production was higher than the yield of other Nubian goat populations (Bidot Fernández, 2013;Marín et al, 2010).…”

Feasibility of using alternate control as a dairy control system in goats

“…Dairy control provides producers with quantifiable tools for evaluation of their respective productive systems and the performance of their animals (Ait-Saidi et al 2008;Marin et al 2010).…”