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.

Effect of milking machine factors on the somatic cell count of milk from cows free of intramammary infection: II. Vacuum level and overmilking

1983 ◽  
Vol 50 (2) ◽  
pp. 141-148 ◽  
Author(s):  
George R. Olney ◽  
Robert K. Mitchell
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Latin Square ◽  
Vacuum Level ◽  
Intramammary Infections ◽  
Intramammary Infection ◽  
Milking Machine

SummaryThe effect of milking vacuum levels and overmilking on the somatic cell count of milk from cows free of intramammary infections was determined. In the first experiment, 4 levels of vacuum ranging from 35 to 70 kPa were compared in a Latin square design with 20 cows being milked at each of the 4 vacuum treatments for periods of 19 d. In the second experiment 40 cows were milked for 16 weeks at either 50 or 70 kPa with or without 5 min overmilking. Neither vacuum level nor overmilking affected somatic cell count and it is concluded that these factors do not cause stress or irritation that will lead to an increase in somatic cell count in the absence of mastitis infections.

Effect of milking machine factors on the somatic cell count of milk from cows free of intramammary infection: I. Vacuum fluctuations

1983 ◽  
Vol 50 (2) ◽  
pp. 135-140 ◽  
Author(s):  
George R. Olney ◽  
George W. Scott ◽  
Robert K. Mitchell
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Latin Square ◽  
Vacuum Fluctuations ◽  
Vacuum Fluctuation ◽  
Vacuum Level ◽  
Intramammary Infections ◽  
Intramammary Infection ◽  
Milking Machine

SummaryThe effect of vacuum fluctuations during milking on the somatic cell count of milk from cows free of intramammary infections was determined. Four vacuum fluctuation treatments were compared using a Latin square design with 20 cows being milked at each of the 4 treatments for a continuous period of 12 d. The vacuum fluctuations were designed to simulate the depressions in vacuum that occur when applying teatcups during milking. In the most severe treatment the vacuum level fell from 50 to 14 kPa. The somatic cell count was not affected by vacuum fluctuation treatment and it is concluded that vacuum fluctuations will not cause an increase in the somatic cell count of milk in the absence of mastitis infections.

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 coagulase-negative staphylococci on somatic cell count in Dutch dairy herds

2010 ◽  
Vol 77 (3) ◽  
pp. 318-324 ◽  
Author(s):  
Otlis Sampimon ◽  
Bart HP van den Borne ◽  
Inge Santman-Berends ◽  
Herman W Barkema ◽  
Theo Lam
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Health Management ◽  
Dairy Farms ◽  
Subclinical Mastitis ◽  
Dairy Herds ◽  
Coagulase Negative Staphylococci ◽  
Intramammary Infections ◽  
Milk Samples

The effect was quantified of coagulase-negative staphylococci (CNS) intramammary infections on quarter- and cow-level somatic cell count (SCC) and on bulk milk somatic cell count (BMSCC) in different BMSCC cohorts in Dutch dairy herds. Two datasets were used for this purpose. In the first dataset, on 49 randomly selected dairy farms a total of 4220 quarter milk samples of 1072 cows were collected of all cows and heifers with a test-day SCC ⩾250 000 and ⩾150 000 cells/ml, respectively, and of 25% of cows and heifers below these thresholds. In the second dataset, on 39 selected dairy farms a total of 8329 quarter milk samples of 2115 cows were collected of all cows with a test-day SCC ⩾250 000 cells/ml following two consecutive SCC <250 000 cells/ml, and of heifers using the same SCC criteria but with a threshold of 150 000 cells/ml. These cows and heifers were defined as new high SCC. In both datasets, CNS was the most frequently isolated pathogen, 11% in the first dataset and 12% in the second dataset. In both datasets, quarters with CNS IMI had a lower SCC than quarters infected with major pathogens, and a higher SCC than culture-negative quarters. The same was found for SCC at cow level. Coagulase-negative staphylococci were more often found in quarters with SCC ⩾200 000 cells/ml in dairy farms with a BMSCC <150 000 cells/ml compared with dairy farms with a higher BMSCC. Prevalence of CNS in cows and heifers with a high SCC was higher in dairy farms with a BMSCC <150 000 cells/ml compared with dairy farms with a medium or high BMSCC: 30, 19 and 18%, respectively. This indicates that CNS IMI as a cause of subclinical mastitis is relatively more important in dairy farms with a low BMSCC and may become a point of attention in udder health management on that type of farm.

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