the mean percentage of pneumonia for a herd was positively and highly correlated with the standard deviation of that herd ( r = +0.914 ; p < 0.0001 ) , the prevalence of pigs having > /=5 % lung involved with pneumonia in that herd ( r = +0.946 ; p < 0.0001 ) and with the percentage of lung that was observed to be the maximally affected lung in each corresponding herd ( r = +0.940 ; p < 0.001 ) .
C0032285
pneumonia
C0024109
lung