Enzootic Pneumonia

 

The approximate relationship between lung damage/scoring system

at slaughter at 95 kg and daily liveweight gain and food conversion ratio

 

 

Lung Lesion

DLW Reduction

FCR increase

 

 

%

gr./day

%

Value

 

0/55

NEGATIVE

 

0

 

0

 

0

 

0

 

2/55

MILD

 

-4

 

-25

 

0

 

0

 

10/55

MILD

 

-7

 

-50

 

+5

 

0.15

 

15/55

MODERATE

 

-11

 

-80

 

+8

 

0.25

 

20/55

MODERATE

 

-15

 

-100

 

+11

 

0.35

 

30/55

SEVERE

 

-20

 

-130

 

+14

 

0.40

 

55/55

SEVERE

 

-22

 

-560

 

+17

 

0.50

 

The estimates of reduction in DLW and FCR is based on Straw 1989 using pigs with 700g/day over the finishing period and a FCR of 3.

The lungs are shown from the front, with the intermediate lobe superimposed for completeness