at least 5 female rats from each of 24 inbred ( aci , as , bdix , bh , bn , bs , buf , da , le , lew , mwf , om , sprd-cu3 , w-krypt , and wky ) , rt1 congenic [ bh.1l ( lew ) , lew.1a ( avn ) , lew.1c ( wist ) , lew.1lv3 ( bh ) , lew.1k ( shr ) , and lew.1n ( bn ) ] , and f1 hybrid [ ( lew x bn ) f1 , ( lew.1w x lew.1a ) f1 , and ( lew x lew.1w ) f1 ] strains , representing eight independent major histocompatibility complex ( mhc ) haplotypes ( a , b , c , dv1 , k , l , n , and u ) and five related rt1 haplotypes ( av1 , lv1 , lv3 , uv2 , and uv3 ) , were inoculated intravenously with mycoplasma arthritidis , and the severity of the polyarthritis that developed was determined by estimating arthritis scores and weight reductions .
C0162323
polyarthritis
C0003864
arthritis