scholarly journals Monitoring herd incidence of intramammary infection in lactating cows using repeated longitudinal somatic cell count measurements

2013 ◽  
Vol 96 (3) ◽  
pp. 1568-1580 ◽  
Author(s):  
S. Dufour ◽  
I.R. Dohoo
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Intramammary Infection ◽  
Lactating Cows

scholarly journals Udder Morphometry and Its Relationship with Intramammary Infections and Somatic Cell Count in Serrana Goats

Animals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1534
Author(s):  
Gisele Margatho ◽  
Hélder Quintas ◽  
Vicente Rodríguez-Estévez ◽  
João Simões
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Coagulase Negative Staphylococci ◽  
Breeding Programs ◽  
Healthy Group ◽  
Intramammary Infections ◽  
Intramammary Infection ◽  
Degree Of Separation ◽  
Separation Parameters

The external morphological traits of the mammary gland, and their relationships with somatic cell count (SCC) and the presence of intramammary infection (IMI), were studied in 30 Serrana goats, Transmontano ecotype. Globular-shaped udders were the most predominant, with slightly separated and symmetrical halves, presenting some degree of suspension. Funnel-shaped teats were the most prevalent shape with an opening of 120° to 160° degrees. Significant differences were observed between healthy group and the coagulase negative staphylococci (CNS)-infected group for udder cleft, teat perimeter and distance between teats parameters; and between healthy group and CNS or Staphylococcus aureus groups for degree of separation, teat shape and udder shape (p < 0.05). The udder shape, symmetry, degree of suspension and degree of separation parameters showed to be different depending on SCC (p < 0.05). The udder perimeter and udder depth traits showed differences between the lowest and the middle SCC group. We concluded that bifurcated pendular udders, with vertical loose teats and located close to each other, are more likely to have IMI, and have the highest SCC. The inclusion in breeding programs of certain mammary conformation traits would not only help to improve milk production, but would also decrease the susceptibility to IMI of the herd.

Effect of milking machine factors on the somatic cell count of milk from cows free of intramammary infection: III. Pulsator rate

1983 ◽  
Vol 50 (2) ◽  
pp. 149-152 ◽  
Author(s):  
George R. Olney ◽  
George W. Scott
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Latin Square ◽  
Intramammary Infections ◽  
Intramammary Infection ◽  
Milking Machine

SummaryThe effect of pulsator rates on the somatic cell count of milk from cows free of intramammary infections was determined. Four pulsator rates ranging from 30 to 120 cycles/min were compared in a Latin square design with 20 cows being milked at each of the 4 pulsator rates for periods of 19 d. Somatic cell count was not affected by any of the pulsator rates and it is concluded that varying pulsator rates will not cause stress or irritation that will lead to an increase in somatic cell count in the absence of mastitis infections.

scholarly journals Differential Somatic Cell Count as a Marker for Changes of Milk Composition in Cows with Very Low Somatic Cell Count

Animals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 604 ◽  
Author(s):  
Alfonso Zecconi ◽  
Francesca Dell’Orco ◽  
Diego Vairani ◽  
Nicoletta Rizzi ◽  
Micaela Cipolla ◽  
...  
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Milk Fat ◽  
Somatic Cell Count ◽  
Milk Composition ◽  
Cow Milk ◽  
Udder Health ◽  
Lactating Cows ◽  
Accuracy Of Measurements ◽  
The Relationship

The recent availability of a high-throughput milk analyzer performing a partial differential somatic cell count (DSCC) opened new opportunities in investigations on bovine udder health. This analyzer has a potential limitation on the accuracy of measurements when the somatic cell count (SCC) is below 50,000 cells/mL, values characterizing a good proportion of lactating cows in many herds. We obtained data for cows below this threshold, assessed the repeatability of these measurements and investigated the relationship between DSCC and udder health, milk composition and yield. Overall, 3022 cow milk test records performed on a Fossomatic™ 7/DC (Foss A/S, Hillerød, Denmark) were considered; 901 of them had an SCC ≤ 50,000 cells/mL. These latter samples were analyzed by qPCR to identify the presence of bacteria. Overall, 20.75% of the samples (187) were positive. However, the health status did not have any significant association with DSCC. The analysis of the association of DSCC on milk fat, protein and casein showed a significant decrease in their proportions as the DSCC increased, whereas it was not observed for milk yield and lactose. Therefore, DSCC in very low SCC cows may be suggested as a marker to identify early changes in milk composition.

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