scholarly journals The proposed reduction in the upper limit of somatic cell counts in raw milk and its effect on the milk industry in Puerto Rico.

1969 ◽  
Vol 93 (3-4) ◽  
pp. 239-254
Author(s):  
Jaime E. Curbelo ◽  
José Pantoja ◽  
Angel A. Custodio ◽  
Ernesto Riquelme ◽  
Raúl Macchiavelli
Keyword(s):  
Puerto Rico ◽  
Somatic Cell ◽  
Dairy Herd ◽  
Raw Milk ◽  
Potential Effect ◽  
Improvement Program ◽  
Data Set ◽  
Somatic Cell Counts ◽  
Cell Counts ◽  
Upper Limit

Data from 302,995 test day records of individual cows of the Puerto Rico Dairy Herd Improvement Program (PRDHIP) and from 8,833 bulk tank results from all herds in Puerto Rico during the years 2004 and 2005 were analyzed for determining the potential effect of implementation of the National Mastitis Council's (NMC) proposal to reduce the present regulatory upper limit for somatic cell count of 750,000 cells/ml of crude milk. Means of herd test day milk yield per cow and of somatic cell scores on the linear scale for this data set were 17.2 kg and 3.9, respectively. On the basis of PRDHIP data, it was estimated that 20% of individual test day values, equivalent to 920,290 kg of raw milk, would exceed the upper limit if it were established at 600,000 cells/ml. The months of highest average milk production were February, March and May (18.4,18.2 and 18.2 kg/day, respectively).The lowest production was observed in August, September and October (16.3,15.6 and 15.8 kg/day, respectively). The months with the lowest average somatic cell score were February and April (both at 3.5) and those of the highest were August, September and October (4.2,4.2 and 4.3, respectively). The average somatic cell counts for herds enrolled or not enrolled in DHIP were similar (461,656 and 473,096, respectively; P greater than 0.05).

Milk production and somatic ceil count in complete lactations in dairy herds in Puerto Rico

1969 ◽  
Vol 80 (3) ◽  
pp. 169-181
Author(s):  
José Pantoja ◽  
Angel A. Custodio ◽  
Paul F. Randel ◽  
Silvia Cianzio ◽  
Bernardino Rodríguez
Keyword(s):  
Puerto Rico ◽  
Somatic Cell ◽  
Cell Count ◽  
Milk Production ◽  
Somatic Cell Count ◽  
Improvement Program ◽  
Somatic Cell Counts ◽  
Natural Logarithm ◽  
Cell Counts ◽  
Unit Increase

Information from 186 herds enrolled in the Puerto Rico Dairy Herd Improvement Program (PRDHIP) was analyzed to evaluate the effect of milk so- matic ceil count on milk production in complete lactations. The data set used consisted of 9,507 lactations from June 1981 to August 1983. The average somatic cell count over the whole lactation was used either as the original count or as the average of the natural logarithm thereof. Simple correlation coefficients between average logarithm somatic cell counts and daily and 305 days' milk production indexes within lactation were low but significant (P < 0.01), -0.04 and -0.03, respectively.The partial regression coefficient for the average logarithm of the somatic cell count on milk yield was highly significant (P < 0.01). The regression model included as independent variables the effects of herds, breed of cow, year of calving, month of calving nested within year, number of days dry, number of days open and number of days in milk. Decrease of 93 ± 10 kg of milk per lactation was found with each unit increase in the average natural logarithm of the somatic cell counts. This result suggests a higher loss in milk production per unit increase in the average natural logarithm at lower cell counts.The variability of the somatic cell counts within lactation did not significantly affect the milk production in 305 days.

Electronic Somatic Cell Count—Chemical Method, DMSCC, and WMT Tests for Raw Milk

1976 ◽  
Vol 39 (12) ◽  
pp. 854-858 ◽  
Author(s):  
D. R. THOMPSON ◽  
V. S. PACKARD ◽  
R. E. GINN
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Confidence Intervals ◽  
Somatic Cell Count ◽  
Raw Milk ◽  
Field Method ◽  
Regression Equations ◽  
Somatic Cell Counts ◽  
Cell Counts ◽  
Coefficients Of Variation

The Direct Miscroscopic Somatic Cell Count — field method (DMSCC), Wisconsin Mastitis Test (WMT), and Electronic Somatic Cell Count (ESCC) were studied to determine variability and relationship to each other. The coefficients of variation computed at a DMSCC count near one million were 15.6% (DMSCC), 6.3% (WMT), and 4.2% (ESCC). Linear regression equations were determined for predicting DMSCC results by WMT and ESCC. The approximate width of the 95% confidence intervals for ESCC predicting DMSCC were ± 275,000 and for WMT predicting DMSCC were ± 600,000. The prediction of square root and log transformations of DMSCC by WMT exhibited narrower confidence intervals for low somatic cell counts, but wider intervals for high counts (greater than 1,000,000).

scholarly journals Short communication: Influence of the sampling device on somatic cell count variation in cow milk samples (by official recording)

2016 ◽  
Vol 14 (1) ◽  
pp. e05SC01
Author(s):  
Ramiro Fouz ◽  
María J. Vilar ◽  
Eduardo Yus ◽  
María-Luisa Sanjuán ◽  
Francisco J. Diéguez
Keyword(s):  
Somatic Cell ◽  
Dairy Herd ◽  
Substantial Effect ◽  
Cow Milk ◽  
Portable Devices ◽  
Least Squares Regression ◽  
Sampling Device ◽  
Improvement Program ◽  
Milk Samples ◽  
Cell Counts

<p>The objective of this study was to investigate the variability in cow´s milk somatic cell counts (SCC) depending on the type of milk meter used by dairy farms for official milk recording. The study was performed in 2011 and 2012 in the major cattle area of Spain. In total, 137,846 lactations of Holstein-Friesian cows were analysed at 1,912 farms. A generalised least squares regression model was used for data analysis. The model showed that the milk meter had a substantial effect on the SCC for individual milk samples obtained for official milk recording. The results suggested an overestimation of the SCC in milk samples from farms that had electronic devices in comparison with farms that used portable devices and underestimation when volumetric meters are used. A weak positive correlation was observed between the SCC and the percentage of fat in individual milk samples. The results underline the importance of considering this variable when using SCC data from milk recording in the dairy herd improvement program or in quality milk programs.</p>

scholarly journals Variation in Somatic Cell Counts in Dairy Herd Improvement Milk Samples

1976 ◽  
Vol 59 (6) ◽  
pp. 1119-1123 ◽  
Author(s):  
G.W. Bodoh ◽  
W.J. Battista ◽  
L.H. Schultz ◽  
R.P. Johnston
Keyword(s):  
Somatic Cell ◽  
Dairy Herd ◽  
Somatic Cell Counts ◽  
Milk Samples ◽  
Cell Counts

scholarly journals Composition, functional properties and sensory characteristics of Mozzarella cheese manufactured from different somatic cell counts in milk

2009 ◽  
Vol 52 (5) ◽  
pp. 1235-1242 ◽  
Author(s):  
Evelise Andreatta ◽  
Andrezza Maria Fernandes ◽  
Marcos Veiga Santos ◽  
Camila Mussarelli ◽  
Marina Célia Marques ◽  
...  
Keyword(s):  
Somatic Cell ◽  
Functional Properties ◽  
Raw Milk ◽  
Sensory Characteristics ◽  
Mozzarella Cheese ◽  
Somatic Cell Counts ◽  
Psychrotrophic Bacteria ◽  
Cell Counts ◽  
Plastic Bags ◽  
Sensory Parameters

In the present study, composition, functional properties and sensory characteristics of Mozzarella cheese produced from milk with somatic cell counts (SCC) at low (<200,000 cells/mL), intermediate (≈400,000 cells/mL) and high (>800,000 cells/mL) levels were investigated. Three batches of cheese were produced for each SCC category. The cheeses were vacuum packed in plastic bags and analysed after 2, 9, 16, 23 and 30 days of storage at 4ºC. SCC level did not affect the moisture, fat, total protein and ash content, mesophilic and psychrotrophic bacteria, and sensory parameters of Mozzarella cheese. However, meltability increased in cheese manufactured from high SCC milk. Results indicated that raw milk used to produce Mozzarella cheese should not contain high SCC (>800,000 cells/mL) in order to avoid changes in the functional properties of the Mozzarella cheese.

Associations between somatic cell counts at calving or prior to drying-off and clinical mastitis in the remaining or subsequent lactation

2006 ◽  
Vol 74 (1) ◽  
pp. 66-73 ◽  
Author(s):  
Anne Cathrine Whist ◽  
Olav Østerås
Keyword(s):  
Somatic Cell ◽  
Cox Regression ◽  
Reference Group ◽  
Geometric Mean ◽  
Dairy Herd ◽  
Clinical Mastitis ◽  
Cow Milk ◽  
Somatic Cell Counts ◽  
Cell Counts ◽  
Increased Risk

Data from 350 herds enrolled in the Norwegian Dairy Herd Recording System (NDHRS) were used to investigate the associations between the first two cow-milk somatic cell counts (SCC) test-days’ results after calving or the three last SCC test-days prior to drying off in the first lactation and the hazard ratio (HR) of clinical mastitis (CM) during the remaining first or the subsequent second lactation respectively. Altogether, 9519 first lactations and 6046 second lactations were included. Cox regression analyses adjusted for herd frailty effect were used. In the first lactation, SCC>40000 cells/ml on the first or second test-day was significantly associated with an increased risk of a CM event in the remaining first lactation. HR, compared with 10000 cells/ml, increased from 1·6 (1·4) for SCC of 40000–60000 cells/ml to 6·9 (4·2) for SCC >800000 cells/ml, when using the first (second) SCC test-day in the first lactation. Cows with a geometric mean of the three last SCC test-days between 50000 and 100000 cells/ml and between 401000 and 800000 cells/ml in the first lactation had HR of CM during the second lactation of 1·3 and 2·8 respectively compared with a reference group of 10000–20000 cells/ml. If a CM episode in the first lactation occurred, the HR for having a CM event during the second lactation was 1·5. There was a significant frailty effect which disappeared if the incidence rate of CM at herd level was included in the model.

Genetic parameters for somatic cell count for three dairy breeds in the united kingdom (uk)

1995 ◽  
Vol 1995 ◽  
pp. 128-128 ◽  
Author(s):  
R A Mrode ◽  
G J T Swanson ◽  
M S Winters
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Genetic Parameters ◽  
Management Practices ◽  
Dairy Herd ◽  
Economic Loss ◽  
Clinical Mastitis ◽  
Average Cell ◽  
Somatic Cell Counts ◽  
Cell Counts

Mastitis constitutes a major source of economic loss in the national dairy herd. Although good management practices can produce a major reduction in mastitis, there is considerable interest in the reduction of mastitis through breeding. Somatic cell counts (SCC) have been used as a way of indirectly measuring sub-clinical mastitis within a herd. Since 1991, average cell count is obtained for all herds and this is used to adjust milk payments.Milk recording organisations introduced a cow cell count service in 1990. The data are now available for the preliminary analysis of the usefulness of somatic cell counts. The objective of this study was to estimate genetic parameters for SCC for three major breeds in the UK.

Management: Chronic high somatic cell counts in the national dairy herd

Livestock ◽  
2008 ◽  
Vol 13 (3) ◽  
pp. 47-48
Author(s):  
James Hanks ◽  
Andrew Biggs BVSc MRCVS
Keyword(s):  
Somatic Cell ◽  
Dairy Herd ◽  
Somatic Cell Counts ◽  
Cell Counts
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