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Table 4 Significant relationships between absolute concentrations of APPs assessed in BALF supernatant and the respiratory score of calves with an experimentally induced respiratory Chlamydia psittaci infection

From: Acute phase proteins as local biomarkers of respiratory infection in calves

Dependent variable: respiratory score
  All time points 4 dpi (acute phase)
Independent Variable P-value P-value
LBP in BALF 0.0000 0.2467
Hp in BALF 0.0026 0.0099
BSA in BALF n.s. 0.0005
CRP in BALF n.s. n.s.
Lf in BALF n.s. n.s.
  1. LBP lipopolysaccharide binding protein. Hp haptoglobin. BSA bovine serum albumin. CRP c-reactive protein. Lf lactoferrin. P probability level. n.s. not statistically significant (P > 0.05)
  2. Legend to Table 4: Equations of multiple regressions
  3. All time points:
  4. \( \begin{array}{l}\mathrm{Respiratory}\ \mathrm{Score} = 0.141 + 0.0217*\mathrm{L}\mathrm{B}\mathrm{P}\ \left[\mathrm{ng}/\mathrm{mL}\ \mathrm{B}\mathrm{ALF}\right] + 0.0003*\mathrm{H}\mathrm{p}\ \left[\mathrm{ng}/\mathrm{mL}\ \mathrm{B}\mathrm{ALF}\right]\\ {}\left(\mathrm{R}{}^2 = 55.26\%;P\hbox{-} Value\ \mathrm{of}\ \mathrm{the}\ \mathrm{model} = 0.0000;\ \mathrm{n}=39\right)\end{array} \)
  5. Acute phase (4dpi):
  6. \( \begin{array}{l}\mathrm{Respiratory}\ \mathrm{S}\mathrm{core} = 0.772\ \hbox{--}\ 0.0067*\mathrm{L}\mathrm{B}\mathrm{P}\ \left[\mathrm{ng}/\mathrm{mL}\ \mathrm{B}\mathrm{A}\mathrm{LF}\right]\ \hbox{--}\ 0.0007*\mathrm{H}\mathrm{p}\ \left[\mathrm{ng}/\mathrm{mL}\ \mathrm{B}\mathrm{A}\mathrm{LF}\right] + \\ {}\ 0.1562*\mathrm{B}\mathrm{S}\mathrm{A}\ \left[\mathrm{ng}/\mathrm{mL}\ \mathrm{B}\mathrm{A}\mathrm{LF}\right]\\ {}\left(\mathrm{R}{}^2 = 56.24\%;P\hbox{-} Value\ \mathrm{of}\ \mathrm{the}\ \mathrm{model} = 0.0000;\ \mathrm{n}=13\right)\end{array} \)