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Table 3 Detection of A. pleuropneumoniae in pleural and pericardial fluids and corresponding severity of disease during acute infection

From: Multi-organ spreading of Actinobacillus pleuropneumoniae serovar 7 in weaned pigs during the first week after experimental infection

  Degree of clinical disease Degree of lung lesions
Non-diseased Mild Moderate Severe No lesions Mild Moderate Severe
Number of animals (n = 15) 1 8 1 5 0 3 5 7
Pleural fluid
Min. volume (mL) 1 1 30 15 1 1 15
Max. volume (mL) 1 35 30 230 13 35 230
Mean volume ± SD (mL) 11.3 ± 11.4 87.0 ± 87.7 7.0 ± 6.4 13.8 ± 13.7 69.3 ± 77.8
Min. cell count (cfu/mL) 0 0 4.2 × 107 9.7 × 107 0 0 4.2 × 107
Max. cell count (cfu/mL) 0 2.7 × 108 4.2 × 107 1.3 × 109 1.5 × 107 2.7 × 108 1.3 × 109
Mean cell count ± SD (cfu/mL) 5.9 × 107 ± 9.7 × 107 4.1 × 108 ± 5.0 × 108 7.5 × 106 ± 8.6 × 106 6.4 × 107 ± 1.2 × 108 3.2 × 108 ± 4.4 × 108
Pericardial fluid
Min. volume (mL) 5 1 4 4 3 1 4
Max. volume (mL) 5 65 4 70 18 65 70
Mean volume ± SD (mL) 13.5 ± 21.6 29.0 ± 27.5 10.5 ± 8.1 15.6 ± 27.8 22.6 ± 25.0
Min. cell count (cfu/mL) 0 0 1.2 × 106 8.7 × 104 0 0 8.7 × 104
Max. cell count (cfu/mL) 0 4.0 × 105 1.2 × 106 2.0 × 108 17 1.5 × 102 2.0 × 108
Mean cell count ± SD (cfu/mL) 5.0 × 104 ± 1.4 × 105 4.0 × 107 ± 8.9 × 107 8.5 ± 9.8 32.4 ± 65.9 2.9 × 107 ± 7.5 × 107