Milk Somatic Cell Count and Polymorphonuclear Cells in Healthy Quarters of Cows That Underwent Blanket and Selective Dry Therapy: An Italian Case Study
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Groups and Inclusion Criteria
- Quarter milk collection and analysis 24 h before drying off;
- Administration of the assigned DCT to each cow;
- Quarter milk collection and analysis after the dry period.
2.2. Statistical Analysis
- SCS = 3 + log2(SCC/100);
- NS = log2(N);
- MS = log2(M);
- LS = log2(L);
- PMNS = 3 + log2(PMN/100).
3. Results
3.1. Data Overview
3.2. Analysis of Variance
4. Discussion
4.1. Descriptive Statistics and Correlations
4.2. Fixed Effects
4.3. Implications
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Item | BDCT | SDCT |
---|---|---|
Number (n) | ||
Overall cows | 98 | 102 |
Cows after restrictions | 41 | 58 |
Quarters after restrictions | 144 | 202 |
Quarters/cow | 3.51 | 3.48 |
Frequency (%) | ||
Parity 1 | 77.6 | 75.6 |
Parity 2 | 15.5 | 17.1 |
Later parities (3 + 4) | 6.9 | 7.3 |
Dry period length (d) | ||
Average | 65.95 | 63.90 |
Standard deviation | 6.13 | 9.14 |
Trait | Before Drying Off | After Drying Off | ||
---|---|---|---|---|
BDCT | SDCT | BDCT | SDCT | |
SCS | 1.71 (1.08) | 1.97 (1.23) | 1.82 (1.79) | 2.57 (1.93) |
NS | 4.41 (0.96) | 4.58 (1.12) | 4.75 (1.81) | 5.33 (2.09) |
MS | 3.58 (1.04) | 3.95 (1.36) | 3.84 (1.51) | 4.46 (1.71) |
LS | 3.81 (0.98) | 4.02 (1.06) | 3.95 (1.55) | 4.39 (1.52) |
PMNS | 1.37 (1.03) | 1.52 (1.18) | 1.52 (1.79) | 2.14 (2.01) |
DSCC | 0.78 (0.19) | 0.74 (0.20) | 0.76 (0.23) | 0.75 (0.21) |
Trait | BDCT | SDCT | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
SCS | NS | MS | LS | PMNS | SCS | NS | MS | LS | PMNS | |
NS | 0.95 | 0.96 | ||||||||
MS | 0.83 | 0.72 | 0.81 | 0.72 | ||||||
LS | 0.89 | 0.81 | 0.65 | 0.85 | 0.80 | 0.65 | ||||
PMNS | 0.97 | 0.97 | 0.71 | 0.91 | 0.97 | 0.97 | 0.70 | 0.88 | ||
DSCC | 0.10 ns | 0.17 | −0.18 | 0.21 | 0.23 | 0.14 ns | 0.20 ns | −0.04 ns | 0.19 | 0.19 |
Trait 1 | p-Value | BDCT | SDCT | ||
---|---|---|---|---|---|
SCS | 0.004 | 1.85 b | (0.23) | 2.68 a | (0.18) |
NS | 0.012 | 4.73 b | (0.25) | 5.48 a | (0.19) |
MS | 0.048 | 3.91 b | (0.23) | 4.47 a | (0.17) |
LS | 0.040 | 3.95 b | (0.20) | 4.45 a | (0.15) |
PMNS | 0.009 | 1.53 b | (0.23) | 2.25 a | (0.17) |
DSCC | 0.785 | 0.76 a | (0.03) | 0.75 a | (0.02) |
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Costa, A.; De Marchi, M.; Sagrafoli, D.; Lanzi, H.; Amatiste, S.; Boselli, C.; Giacinti, G. Milk Somatic Cell Count and Polymorphonuclear Cells in Healthy Quarters of Cows That Underwent Blanket and Selective Dry Therapy: An Italian Case Study. Vet. Sci. 2021, 8, 298. https://doi.org/10.3390/vetsci8120298
Costa A, De Marchi M, Sagrafoli D, Lanzi H, Amatiste S, Boselli C, Giacinti G. Milk Somatic Cell Count and Polymorphonuclear Cells in Healthy Quarters of Cows That Underwent Blanket and Selective Dry Therapy: An Italian Case Study. Veterinary Sciences. 2021; 8(12):298. https://doi.org/10.3390/vetsci8120298
Chicago/Turabian StyleCosta, Angela, Massimo De Marchi, Daniele Sagrafoli, Hillary Lanzi, Simonetta Amatiste, Carlo Boselli, and Giuseppina Giacinti. 2021. "Milk Somatic Cell Count and Polymorphonuclear Cells in Healthy Quarters of Cows That Underwent Blanket and Selective Dry Therapy: An Italian Case Study" Veterinary Sciences 8, no. 12: 298. https://doi.org/10.3390/vetsci8120298