1362 Supplementation of β-mannanase (CTCZYME) to lactating dairy cattle diets improves feed conversion efficiency and somatic cell count

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 658-659
Author(s):  
E. Kebreab ◽  
T. Tewoldebrhan ◽  
R. Appuhamy ◽  
M. Niu ◽  
S. Seo ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Somatic Cell ◽  
Cell Count ◽  
Conversion Efficiency ◽  
Somatic Cell Count ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Lactating Dairy Cattle

scholarly journals Exogenous β-mannanase improves feed conversion efficiency and reduces somatic cell count in dairy cattle

2017 ◽  
Vol 100 (1) ◽  
pp. 244-252 ◽  
Author(s):  
T.A. Tewoldebrhan ◽  
J.A.D.R.N. Appuhamy ◽  
J.-J. Lee ◽  
M. Niu ◽  
S. Seo ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Somatic Cell ◽  
Cell Count ◽  
Conversion Efficiency ◽  
Somatic Cell Count ◽  
Feed Conversion ◽  
Feed Conversion Efficiency

A COMPARISON OF MASTITIS DETECTION METHODS IN DAIRY CATTLE

1984 ◽  
Vol 64 (2) ◽  
pp. 305-312 ◽  
Author(s):  
T. R. BATRA ◽  
A. J. McALLISTER
Keyword(s):  
Dairy Cattle ◽  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Good Accuracy ◽  
Subclinical Mastitis ◽  
Detection Methods ◽  
Considerable Proportion ◽  
Milk Samples ◽  
California Mastitis Test

The potential value of electrical conductivity, somatic cell count, and California Mastitis Test (CMT) Score in composite milk samples as a screening test for subclinical mastitis was evaluated. The effect of genetic group was significant (P < 0.05) for conductivity and somatic cell count while the effects of parity and month of lactation were significant (P < 0.01) for all the three traits studied. Somatic cell count and CMT score increased from first to fourth parity while there was general trend for increasing conductivity from second to fourth parity. All the three methods identified healthy cows with a good accuracy but failed to recognize a considerable proportion of infected cows. The error rate for misclassification was lowest for CMT score (9.1%), followed by somatic cell count (13.9%) and conductivity (29.4%). Composite strict foremilk samples from cows infected with primary pathogens had significantly (P < 0.01) higher conductivity than those from uninfected cows. Staphylococcus aureus were isolated in 60% of the milk samples and appeared to be in the major organism causing mastitis in this herd. Key words: Dairy cattle, mastitis detection methods

Quantitative trait loci affecting clinical mastitis and somatic cell count in dairy cattle

2001 ◽  
Vol 12 (11) ◽  
pp. 837-842 ◽  
Author(s):  
Helge Klungland ◽  
Ayman Sabry ◽  
Bjørg Heringstad ◽  
Hanne Gro Olsen ◽  
Luis Gomez-Raya ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Dairy Cattle ◽  
Somatic Cell ◽  
Cell Count ◽  
Quantitative Trait ◽  
Somatic Cell Count ◽  
Clinical Mastitis ◽  
Trait Loci

scholarly journals The effect of response to heat stress, parity, breed and breeding region on somatic cell count in dairy cattle

2020 ◽  
Vol 90 (5) ◽  
pp. 435-442
Author(s):  
Vesna Gantner ◽  
◽  
Božidarka Marković ◽  
Mirna Gavran ◽  
Marcela Šperanda ◽  
...  
Keyword(s):  
Heat Stress ◽  
Dairy Cattle ◽  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
High Variability ◽  
Humidity Index ◽  
The Individual ◽  
Daily Milk Yield ◽  
Daily Milk

With the aim of determining the effect of response to heat stress, parity, breed and breeding region on somatic cell count (SCC) in dairy cattle, the individual test-day records of dairy cows collected from 2005 to 2012 in regular milk recording (AT4 / BT4 method) in Croatia were used. The proportional differences in log somatic cell count, and logSCC (in %) in subsequent milk recordings (1st, and 2nd) were determined in cows with a significant decrease in daily milk yield at a set temperature-humidity index, THI threshold (68, 72, and 76). The results indicate high variability in somatic cell count due to the animal’s response to heat stress (heat stressed at THI in 68, 72, and 76), parity (1, 2, and 3+), breed (Holstein, and Simmental) and breeding region (Central, and Eastern Croatia). Also, it could be pointed out that Holsteins, especially cows in higher parities (2, 3+) reared in Eastern Croatia were shown to be more sensitive to environmental stress, even in the period after heat stress (1st, and 2nd subsequent milk recording). Since SCC is not only an indicator for mastitis, but also reflects a cow’s immune response to general stress situations, the high variability determined may be explained by the individual adaptation capabilities of these two breeds to breeding conditions in the analysed regions.

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