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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).
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Multidisciplinary Respiratory Medicine

ISSN: 2049-6958

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