in contrast , in untreated animals the numbers of bacteria in the lung gradually increased from 10 ( 6 ) to 10 ( 9 ) c.f.u . g-1 , and a few animals in which the organism increased to 10 ( 9 ) c.f.u . g-1 had died by 6 and 10 d after infection .
C0004611
bacteria
C0029235
organism