eleven pathogens including p. aeruginosa , salmonella spp. , e. coli o115a , c : k ( b ) , p. pneumotropica , b. bronchiseptica , c. kutscheri , tyzzer 's organism , m. pulmonis , sendai virus , mhv and syphacia spp . were surveyed in 217 mouse and rat breeding colonies during 1972-1981 .
C0450254
pathogens
C0029235
organism