356 INFECTIVE DISEASES. 



Pasteur found tliat, by succeswve inoculation of I'iibbits, tlui virulence 

 was exalted for rabbits, but attcsnuutoil for swine, and the virus 

 which had thus been passed tliiougli ilm rabbit was used as a 

 vaccina for swine, to protect tlit^ni af,'ainst virulent (!rysi])o]iis. 



Pasteur- found that by passing the virus through pigeons it was 

 made more virulent for swino. ' 



In the blood, and the juice of the internal organs, and of the 

 lymph glands, Schiitz found ii minute bacillus identical with the 

 bacillus of iiious(,' septica3mia. 



Bacillus of Swine Erysipelas (Schiit/,).- J<]xtroiii((ly minute 

 rods '6 to 1"8 fji. in length, morphologically and in cultural charac- 

 ters identical with the bacillus of mouse sopticamiiii. J^'iliunoiits 

 and involution forms. Spore-formation present. 



IlouKo mice if inoculated with ii, pure culture dio in two to foui' 

 days. Pigeons ar(^ also very susceptible. Fowls and guinea-pigs 



Fji;. 142, —Bai,'] 1,1,1 oi' Hwi.nk Ii'iij. 1 4:i. lii,ooii OK PlOKON IN00UI,ATJC1) 

 EBYBlPBr.AS (Uai.'mgaktk.n). wjth BAcn.i.r oi' 8wink l';nvHii'Kr,AS, x (iOO 



(Srnij'l'z), 



ai-(; immune. Rabbits after iuoculatiorj of tlio oar suffer from 

 erysipelatous inflammation, identical with that produced Vjy inocu- 

 lation of tlif^ bacillus of niousi; seijticasmia. The batu'lli are also 

 pathogenic in swiuo and sheep. 



Protective Inoculation. — With Pasteur's vaccine immunity i« 

 said to be produced which lasts about a yniif. Schiitz iind Schottolius 

 found tli<^ minute bacilli in Pasteui''s vaccin*!, which they had ;i heady 

 found in cases of swine er-ysipelas in, (J(;i-inii,ny. 



The r-esults of vaccination in France ai-o said to be very Satis- 

 factory, but in test i-xperirncnts in Germany they were not so 

 favourable. Out of 119 vaccinated swine .5 pei' cent, died as thi^ 

 result of the inoculation, while the average lo.ss in the ordimxry way 

 is 2 pi'r cuni,. 



Metchnikoff foiu/d that the blood of immunised ralibits was 

 ;intitoxic, and Lorenz maintains llmt the .seruin of swine wliicli 



