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Table 2 Respiratory impedance assessed during expiration in the frequency range 3–15 Hz in calves either challenged with 10 8 inclusion forming units of C. psittaci or sham-inoculated controls

From: Evaluation of pulmonary dysfunctions and acid–base imbalances induced by Chlamydia psittaci in a bovine model of respiratory infection

   −7 d a.i. −4 d a.i. 3 dpi 8 dpi 11 dpi 14 dpi
   n = 18 per group n = 18 per group n = 18 per group n = 9 per group n = 6 per group n = 6 per group
Xrs ex 3 Hz C. psittaci −0.018 −0.021 −0.038 −0.040 −0.018 −0.010
[0.015] [0.012] [0.031] [0.026] [0.019] [0.017]
Controls −0.026 −0.028 −0.014 - 0.009 0.006 0.004
[0.026] [0.028] [0.017] [0.019] [0.015] [0.011]
Xrs ex 5 Hz C. psittaci −0.003 −0.009 −0.045 −0.034 0.000 0.007
[0.018] [0.015] [0.041] [0.032] [0.023] [0.022]
Controls −0.015 −0.015 0.001 −0.008 0.025 0.026
[0.035] [0.032] [0.021] [0.025] [0.022] [0.020]
Xrs ex 10 Hz C. psittaci 0.041 0.027 −0.031 0.005 0.045 0.047
[0.024] [0.025] [0.050] [0.032] [0.023] [0.041]
Controls 0.023 0.032 0.046 0.051 0.077 0.075
[0.045] [0.038] [0.031] [0.033] [0.033] [0.032]
Xrs ex 15 Hz C. psittaci 0.058 0.049 0.002 0.037 0.064 0.066
[0.028] [0.026] [0.046] [0.023] [0.018] [0.035]
Controls 0.047 0.050 0.068 0.067 0.089 0.093
[0.034] [0.036] [0.032] [0.030] [0.017] [0.021]
Rrs ex 3 Hz C. psittaci 0.333 0.334 0.387 0.355 0.321 0.329
[0.051] [0.038] [0.103] [0.059] [0.052] [0.074]
Controls 0.335 0.339 0.314 0.303 0.284 0.279
[0.068] [0.060] [0.044] [0.059] [0.038] [0.031]
Rrs ex 5 Hz C. psittaci 0.318 0.319 0.366 0.329 0.306 0.319
[0.047] [0.036] [0.096] [0.046] [0.048] [0.071]
Controls 0.337 0.318 0.300 0.291 0.276 0.272
[0.060] [0.050] [0.040] [0.056] [0.031] [0.033]
Rrs ex 10 Hz C. psittaci 0.319 0.314 0.326 0.306 0.310 0.327
[0.042] [0.031] [0.079] [0.038] [0.035] [0.061]
Controls 0.328 0.314 0.302 0.302 0.299 0.296
[0.044] [0.038] [0.034] [0.047] [0.014] [0.038]
Rrs ex 15 Hz C. psittaci 0.336 0.321 0.325 0.319 0.330 0.343
[0.041] [0.027] [0.074] [0.043] [0.040] [0.055]
Controls 0.344 0.339 0.327 0.324 0.335 0.324
[0.041] [0.040] [0.032] [0.035] [0.020] [0.035]
  1. d a.i., days ante inoculation; dpi, days post inoculation; Rrs ex, respiratory resistance during expiration; Xrs ex, respiratory reactance during expiration. Data are given as mean [standard deviation]. Significant difference between groups at the given time point are highlighted in bold (unpaired t-test, p ≤ 0.05). ↓ indicates a significant decrease compared to baseline data within one group (ANOVA, post hoc test: Bonferroni's multiple comparison procedure, p ≤ 0.01).