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Table 4 Description of the different variables assessed in animals with different courses of disease

From: Comparison of four lung scoring systems for the assessment of the pathological outcomes derived from Actinobacillus pleuropneumoniaeexperimental infections

Variable Peracute Acute Subclinical Uninfected
(n = 9) (n = 31) (n = 12) (n = 9)
Clinical signs Mortality prior to the end of the experiment (%)* 9 (100)a 0 (0)b 0(0)b 0 (0)b
Fever at least one day (%)* 9 (100)a 29 (93.5)a 6 (50)b 2 (22.2)b
Clinical score higher than 0 (%)* 9 (100)a 28 (90.3)a 2 (16.6)b 3 (33.3)b
Mean clinical score (±SD) 1.88 (±0.80)a 1.32 (±0.70)a 0.16 (±0.4)b 0.44 (±0.8)b
Inappetence at least one day (%)* 9 (100)a 21(67.7)b 3 (25.0)c 2 (22.2)c
Production Mean ADG (±SD) (kg/d) -1.91 (±0.83)a 0.47 (±0.4)b 0.83 (±0.2)c 0.9 (±0.2)c
Diagnostic App-like lesions (%)* 9 (100)a 30 (96.7)a 0 (0)b 0 (0)b
App isolation (%)* 9 (100)a 30 (96.7)a 3 (25)b 0 (0)b
PCR detection in tonsil (%)* 8 (88.8)a 18 (58.0)a 10 (83.3)a 0 (0)b
PCR detection in bronchial lymph node (%)* 5 (55.5)a 14 (45.1)a 4 (33.3)a 0 (0)b
Seropositivity to App at death/necropsy* 0 (0)a 16 (51.6)b,c 3 (25.0)a,c 0 (0)a
Mean SPES (Min-Max) 3.88 (3- 4)a 2.09 (1-4)b 0c 0c
Mean LLS (Min-Max) 17.57 (10.71-31.4)a 5.17 (0.26-20.94)b 0c 0c
Mean IA (±SD) 53.3 (±16.11)a 17.29 (±14.00)b 0c 0c
Ratio LW/BW (±SD) 0.91(±0. 00)a,b** 1.27 (±0.54)b 0.88 (±0.21)a 0.96a,b (±0.18)
  1. Different letter in superscript means statistically significant differences within a given variable (p < 0.05). % = percentage; Min = minim; Max = Maximum; SD = standard deviation; *Number of animals showing or being positive by the corresponding parameter. **Data available only from one animal.