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Table 3 Kinetic parameters and correlation coefficients corresponding to the Weibull model fitted to PDCoV survival curves in complete feed and feed additives that were added at twice the manufacturers recommended concentrations

From: Feed additives decrease survival of delta coronavirus in nursery pig diets

  

Log-linear model

Weibull model

Additive1

Log reduction (10 days)

D-value1

Adj R2*

Delta2 (days)

Shape parameter (n)

Adj R2*

Control

2.0

6.05 ± 0.00

0.46

0.35be ± 0.00

0.23

0.86

UltraAcid P

2.0

7.42 ± 0.00

0.22

0.0004a ± 0.00

0.05

0.99

Acid Booster

2.7

4.65 ± 1.24

0.59

0.28be ± 0.18

0.27

0.93

KEMGEST

2.0

7.42 ± 0.00

0.22

0.0004a ± 0.00

0.05

0.99

Activate DA

2.0

6.74 ± 0.60

0.18

0.12bd ± 0.20

0.13

0.72

Luprosil

2.3

4.97 ± 2.40

0.27

0.06b ± 0.03

0.13

0.69

Formic Acid

2.0

8.52 ± 0.00

0.08

4.95ac ± 0.00

0.02

0.50

Sugar

2.0

10.00 ± 0.00

0.13

4.94ac ± 0.00

0.07

0.17

Salt

3.0

4.41 ± 0.52

0.55

0.09bd ± 0.02

0.22

0.91

  1. 1UltraAcid P, (Nutriad, Dendermonde, Belgium), Activate DA (Novus International, St. Charles, MO), Acid Booster (Agri-Nutrition, DeForest, WI), Kemgest (Kemin Agrifoods, Des Moines, IA), Luprosil (BASF, Florham Park, NJ), and formic acid (BASF, Florham Park, NJ)
  2. a, b, c, dMeans of 3 replications; different superscripts differ at (P < 0.05)
  3. eTrend comparing 2× Acid Booster vs. control (P < 0.1)