scholarly journals Connection of milk flow curve to the somatic cell count in bovine milk

2004 ◽  
Vol 47 (6) ◽  
pp. 551-556 ◽  
Author(s):  
P. Mijić ◽  
I. Knežević ◽  
M. Domaćinović
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Flow Rate ◽  
Flow Curve ◽  
Somatic Cell Count ◽  
Peak Flow ◽  
Bovine Milk ◽  
Correlation Coefficients ◽  
Peak Flow Rate ◽  
Milk Flow

Abstract. The modern equipment introduction into cow milking created technical possibilities for studying the milk flow curve and for using the results in cattle selection. In preventing mastitis, besides curing, other parameters of the milk flow curve could be used preventively. Research showed that cows that had the milk flow curve with a short duration of increasing flow rate (dIFR ≤ 0.40 min) and a larger quotient between the peak and down phase (QPD > 1.20) had also the least somatic cell count in milk (LSCC = 3.47, and 3.30 respectively). Such relation is favourable because increasing the relation, the duration of quick and uniform milking extends, and the duration of peak flow rate shortens. That also show correlation coefficients which were between the logarithmic somatic cell count in milk (LSCC) on one hand and the peak flow rate (dPFR), that means the quotient of peak and down phase (QPD) on the other hand negative (r= −0.25** and –0.27**). Breeding-selective procedures could create bull fathers and mothers with the most desirable milk flow curve and the duration of certain milking phases, whereby the somatic cell count in milk would be the least. Therefore it would be necessary to define desirable proportions of the milk flow curve with a special attention to the cow’s health udder.

Production of hydrogen peroxide by a small molecular mass compound in milk from Holstein cows with high and low milk somatic cell count

2008 ◽  
Vol 75 (3) ◽  
pp. 335-339 ◽  
Author(s):  
Senkiti Sakai ◽  
Eriko Nonobe ◽  
Takahiro Satow ◽  
Kazuhiko Imakawa ◽  
Kentaro Nagaoka
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Cell Damage ◽  
Bovine Milk ◽  
Developed Countries ◽  
Control Population ◽  
Dairy Herds ◽  
Small Molecular Weight ◽  
Production Of Hydrogen

Mastitis is the most frequent and prevalent production disease in dairy herds in developed countries. Based on a milk somatic cell count (SCC) of either >300 000 or <200 000 cells/ml in this study, we defined the quarter as either inflamed or uninflamed, respectively. The electrical conductivity (EC) of milk was used as an indicator of udder epithelial cell damage. We determined the amount of H2O2produced by utilizing a small molecular weight compound in milk, and examined the characteristics of H2O2production and EC in milk from inflamed and uninflamed quarters. In cows with milk of delivery grade (control population), H2O2production and EC were 3·6±1·3 nmol/ml and 5·4±0·4 mS/cm (mean±sd), respectively. In 37 inflamed quarter milk samples, the production of H2O2was 1·9±1·0 nmol/ml and was significantly smaller than that in the control population (P<0·01). Production of H2O2was moderately but significantly correlated with EC (r<−0·71). In 20 cows with inflamed quarters, the production of H2O2in milk from inflamed quarters was significantly smaller than that in milk from uninflamed quarters (P<0·01). In 18 out of 20 cows, milk from inflamed quarters showed the smallest H2O2production among all tested quarters in each cow. We conclude that inflammation caused a decrease in H2O2production in milk. In this study, we present parameters for evaluating the lactoperoxidase/H2O2/thiocyanate antibacterial defence system in bovine milk.

Variation in activity and heterogeneity of bovine milk proteases with stage of lactation and somatic cell count

2006 ◽  
Vol 16 (1) ◽  
pp. 1-8 ◽  
Author(s):  
L.B. Larsen ◽  
P.L.H. McSweeney ◽  
M.G. Hayes ◽  
J.B. Andersen ◽  
K.L. Ingvartsen ◽  
...  
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Bovine Milk ◽  
Stage Of Lactation

COMPARISON OF FOUR METHODS FOR ENUMERATING SOMATIC CELLS IN MILK WITH AN ELECTRONIC COUNTER

1973 ◽  
Vol 36 (2) ◽  
pp. 94-100 ◽  
Author(s):  
W. N Philpot ◽  
J. W. Pankey
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Correlation Coefficients ◽  
Test Tube ◽  
Regulatory Testing ◽  
Rapid Fixation ◽  
Herd Milk ◽  
Standardization Of Procedures ◽  
Good Agreement

Four chemical fat dispersion methods for conducting the Electronic Somatic Cell Count of milk were studied. The four methods were Rapid/Fixation/Dispersion, Somafix/Somaton, and two methods reported by the International Dairy Federation. Results were critically affected by variations in several procedural factors: type of test tube used for cell fixation and fat dispersion; ratio of milk to diluent; duration of cellular fixation; temperature and duration of fat dispersion; aging of milk samples before analysis; aging of fixed and dispersed samples; and method to agitate samples after fixation and dispersion. After standardization of procedures, the four methods were used, under regulatory testing conditions, to determine the cellular content of three groups of 50 samples of bulk herd milk. A Wisconsin Mastitis Test was done on each and a Direct Microscopic Somatic Cell Count was done on the latter two groups of samples. Attempts to fix cells and disperse fat simultaneously with a Rapid/Fixation/Dispersion method were unsatisfactory. The somatic cell estimates obtained with the other three methods were in good agreement with the direct microscopic results; correlation coefficients ranged from r = 0.854 to 0.977. Merits of each of the four methods are discussed.

Influence of milk flow rate and streak canal length on new intramammary infection in dairy cows

1991 ◽  
Vol 58 (4) ◽  
pp. 383-388 ◽  
Author(s):  
Robert J. Grindal ◽  
Andrew W. Walton ◽  
J. Eric Hillerton
Keyword(s):  
Flow Rate ◽  
Peak Flow ◽  
Peak Flow Rate ◽  
Secondary Importance ◽  
Flow Rates ◽  
Intramammary Infection ◽  
Susceptibility To Infection ◽  
Milk Flow ◽  
Wide Range ◽  
Mastitis Control

SummaryEighteen cows with a wide range of quarter peak flow rates (0·35–2·22 kg/min) were inoculated with Streptococcus agalactiae and Str. dysgalactiae 4 mm into each streak canal every 3 d for 12 d. Thirty of the 72 quarters developed intramammary infection. Mean peak flow rate and length of streak canal of those quarters that became infected were 1·26 ± 0·08 kg/min (mean ± SEM) and 11·47 ± 0·41 mm respectively, compared with 1·01 ± 0·05 kg/min and 12·05 ± 0·35 mm for those that remained uninfected. Logistic regression analysis showed that the probability of infection increased significantly with the increase in peak flow rate (P = O·O1). The influence of streak canal length on new infection, after allowing for the effect of peak flow rate, was not significant at the 5% level (P = 0·07), suggesting that there may be an inverse relationship between teat duct length and infection, but that it is of secondary importance to peak flow rate. If increased mass of milk distends the teat duct by raising intramammary pressure, then quarter susceptibility to infection is further compromised. These results strongly suggest that the benefits of reduced infection from mastitis control, achieved despite dramatic increases in milk flow rate and milk yield, are significantly underestimated.

scholarly journals Interaction of Somatic Cell Count and Quarter Milk Flow Patterns

2007 ◽  
Vol 90 (5) ◽  
pp. 2223-2228 ◽  
Author(s):  
V. Tančin ◽  
A.H. Ipema ◽  
P. Hogewerf
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Flow Patterns ◽  
Milk Flow

scholarly journals Milk flow pattern, somatic cell count and teat apex score in primiparous dairy cows at the beginning of lactation

2009 ◽  
Vol 8 (1) ◽  
pp. 103-111 ◽  
Author(s):  
Maddalena Zucali ◽  
Luciana Bava ◽  
Anna Sandrucci ◽  
Alberto Tamburini ◽  
Renata Piccinini ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Somatic Cell ◽  
Cell Count ◽  
Flow Pattern ◽  
Somatic Cell Count ◽  
Milk Flow

scholarly journals Effect of somatic cell counts occurred in milk on quality of Slovak traditional cheese – Parenica

10.5219/1099 ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 675-680 ◽  
Author(s):  
Viera Ducková ◽  
Margita Čanigová ◽  
Peter Zajác ◽  
Zuzana Remeňová ◽  
Miroslav Kročko ◽  
...  
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Dry Matter ◽  
Correlation Coefficients ◽  
Mean Value ◽  
Matter Content ◽  
Dry Matter Content ◽  
Somatic Cell Counts ◽  
Cell Counts

The aim of this work was to compare somatic cell count in milk used for making steamed cheese Parenica in Slovak industrial dairies and small farm dairies and to find out whether somatic cell counts in milk affect the dry matter content of Parenica cheese. The samples of raw milk were taken from 3 industrial dairies (A, B, C) and from 3 farm dairies (E, F, G), produced traditional Slovak cheese Parenica in period from January untill December 2018. The somatic cell count in milk was determined by FossomaticTM 5000 (Foss, Denmark) and dry matter of cheese by oven drying method to constant weight. There were no statistically significant differences (p >0.05) for somatic cell counts in milk processed in industrial and farm dairies. Lower somatic cell counts were determined in milk amples from industrial dairies (mean value 326.55 thousand in 1 mL) in comparison to milk samples from farm dairies (mean value 507.67 thousand in 1 mL). Statistically lower dry matter content (p <0.01) in the samples of Parenica cheese was found out in farm dairy E in comparison to other dairies. The relationship between somatic cell count in milk and dry matter in cheese was confirmed by the relatively low correlation coefficients in dairies, A = 0.22; C = 0.15 and F = -0.12 and higher correlation coefficients in dairies, B = -0.32; D = 0.45 and E = -0.48. Obtaining a more accurate effect of somatic cell count on cheese quality requires the continuation of the research on a larger number of samples and consideration of other factors.

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