statistical evaluation showed that in the acute phase ( days 1 to 42 after infection ) as well as in the chronic phase ( days 39 to 121 after infection ) of the disease , the means of the arthritis scores for the strains form a continuous variation without significant interruptions , with the very sensitive lew rats , the rt1 congenic rats on lew background , the f1 hybrids with lew , and the mwf , bs , bh , and da rats on one end and the resistant wky , buf , w-krypt , le , and om rats on the other end .
C0009450
infection
C0012634
disease