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Table 1 Changes in selected fatty acid composition [g/100 g of fat] for different concentrations of BHBA in the first 14 days of lactation

From: The relationship between plasma β-hydroxybutyric acid and conjugated linoleic acid in milk as a biomarker for early diagnosis of ketosis in postpartum Polish Holstein-Friesian cows

Component

BHBA 0.51–1.2 mmol/L

BHBA > 1.2 mmol/L

BHBA 0.51–1.2 mmol/L

BHBA > 1.2 mmol/L

SEM

d 5–7

d 8–14

C4:0

2.821A

2.392A

2.920 A

2.475 A

0.0963

C6:0

1.550 A

1.356 A

1.761 A

1.296 A

0.0960

C8:0

1.239 A

0.902 A

1.269 A

1.028 A

0.0768

C10:0

2.379 A

1.830 A

1.767 A

2.014 A

0.1154

C12:0

2.718a

2.528a

2.653a

2.468a

0.1311

C14:0

9.357a

8.818a

9.239

9.094

0.3331

C16:0

29.801

30.440

32.420

31.001

0.8070

C16:1

1.495A

2.004A

1.858

1.840

0.0131

C17:0

0.624

0.590

0.627

0.619

0.0240

C18:0

17.734

17.908

17.601

17.834

0.2729

C18:1 c9

23.581A

25.241A

25.360A

27.262A

0.6752

C18:3 n6

0.032A

0.049A

0.054

0.050

0.0063

C20:4 n6

0.166A

0.137A

0.161

0.158

0.0072

C20:5 n3

0.088

0.076

0.090

0.087

0.0040

C22:5 n3

0.069

0.065

0.055

0.045

0.0008

  1. Samples of milk and blood were collected from the cows for laboratory analyses at weekly intervals. Samples were taken at six time points: between days 5–7, 8–14, 15–21, 22–28, 29–35, and 36–42. The cows involved in the experiment were divided into two groups – ketotic (BHBA > 1.2 mmol/L and NEFA ≥0.7 mmol/L at 5–7 days postpartum) and healthy (BHBA 0.51–1.2 mmol/L and NEFA < 0.7 mmol/L at 5–7 days postpartum)
  2. Data were presented as LSM with SEM
  3. NEFA Nonesterified fatty acids, BHBA β-hydroxybutyric acid, DIM Days in milk, LSM Least square of mean, SEM Standard error of LSM
  4. aAMeans in the same rows (for selected DIM) marked with the same letters differ significantly at: small letters –P ≤ 0.05; capitals– P ≤ 0.01