Table 4 Studies assessing the impact of cranioventral pulmonary consolidation (CVPC) on average daily gain (ADG) in pigs.

Presence of CVPC

[59]

23 studies

10 publications: no effect 13 publications: decrease

[51]

9 studies

−17%

Feed conversion ratio +14%

High correlation between decreased ADG and feed conversion ratio

[36]

2 farms (578 pigs)

Farm A: −26 g

Farm B: −26 g

[54]

14 farms (6,997 pigs)

−38 g (−4.9%)

Large differences between farms (range: −7% to +2.6%

[69]

39 farms

No effect

No effect on feed conversion ratio

Performance data were analysed at farm level; lung lesions were assessed on one subgroup (35 pigs per farm) at slaughter

[8]

1 farm (108 pigs)

−9%

Severity of CVPC

[51]

5 studies

37.4 g per 10% of affected lung tissue

Five studies

[52]

21 pigs

20% CVPC throughout lifetime: 25 kg lower weight at slaughter

Radiographic monitoring of the lungs from 21 to 180 days of age

25 days extra to reach slaughter weight

[7]

2 farms (41 lungs)

41.1 g/day for 10% affected lung volume

10% affected lung leads to 16.7 days more to reach 104.5 kg

[70]

2 farms (58 lungs)

31.4 g/day for 10% affected lung volume

10% affected lung leads to 13·2-days more to reach 104.2 kg

Only significant association between lung lesion and ADG in one farm

[72]

1 farm (333 pigs)

2.2 g/day for each 1% of affected lung volume

1% affected lung leads to 0.61 days more to reach slaughter weight; early infections cause more performance loss

[50]

7 farms (18 cohorts with 30–35 pigs / cohort)

6.8 g/day for 1% of affected lung

Serologic testing was more effective than slaughter evaluation in assessing the impact of subclinical infection on ADG

[73]

1 farm (138 pigs)

Score 2: −45 g/day (−6%)

Score 3: −90 g/day (−11%)

Lung consolidation: score 1: 0–5%; score 2: 6–40%; score 3: > 40%

Score 2: 3.13 kg less at slaughter

Score 2: 10.85 kg less at slaughter

[54]

14 farms (6,997 pigs)

−7.0 g/day (0.7%) for 1 point increase in severity score (1–28)

More ADG decrease in pigs with severe lesions: score 0: 775 g; scores 1–4: 750 g; scores 5–8: 735 g; score > 8: 695 g

[71]

1 farm (500 pigs)

1.8 g/day for each 1% of affected lung surface

Financial loss of §6.55 in pigs with more than 15% affected lung tissue compared to animals without lesions

[8]

1 farm (108 pigs)

−66.4 g/day in pigs with > 10% of affected lung surface versus pigs with no lesions:

Days to slaughter: + 8 days; carcass weight: −3.6 kg