:;x'j f//,.i A' />/;/,* ,iA/77//.M.\ I'YOCYANEUS 



Immunity and Immunization. It is possible to immimi/e .uniii.il 

 Imth h\ llic * .inn. ,u injection of the bacilli which stimulate (lie fnr- 

 maiion of peeilie bacteriolysin.H, and l>\ filtrate, of In-nth culture of 

 the organisms, wliirli incite the formal inn not only nl' lae|erio|\ I ic 

 Sllhslaiire :,, lull antitoxic silbst anees US well. N<> practical n .. i 

 made <!' these ant ihodie , in liiini.in infections, however. 



Bacteriological Diagnosis,- Wounds infected l>\ IJjiclllns |).vnc\ ;mciis 

 JUT usually diagnosed l>\ tin- hluc-grccii ml<r nf the dressings, The 



kiejlli :ire readily isnlnted upon ^ehilin plale,, \\ln-re (he de\ elopniml 

 nl' the Mue-^n-eii enlnr is very eharaeteri in 



BACILLUS ABORTUS. 



Historical. Infect inns jd>nrtimi is n disease which has I'nr nian\ 

 yean leen reen^ni/ed us nil important economic one in the cattle 

 industry. Later it was I'oiind (hut (lie same disease also c\i ,1 

 horses, puits mid sheep. The organism \\a lir.i i .nlated l>.\ 

 Morphology. 15. almrtii:. ifl a ..mall plcioniorphic hacilhis, i 

 D.I to ll.li micron in diameter, hy O.li t> L'..' microns in length. It 

 occurs singly and in pairs; rarely short chains of three to BUI element 

 are found. Tin 1 slwpe \arii ..: B ..... e Organisms are almost spherical, 



oilier, are dislinelly rod-shaped, tlx' latter heinu nmre frequently 



I'oinul in l>rnlh eiillnre, and /'// WOO, .\<vording (,, I'ries/.," hraiiclieil 



lorm . ma; he found in older cultures. It is non-motile and possesses 



IK) Qagella, alllmn^h ln>\\ niaii movement max he fairly active. It 



possesses no capsules, and no pore have heen demonst rated. It 



lam readily with ordinary anilin dyes, Imt :.nn-\\hat irrej-'iilarl \ , 



...... areas .staining more intensely than others. ( )cca-,iiniall\ \\illi 



the iiK'thylcne hhie stain the organisms may present a hipolar appear 

 anee. The rg;i ni MM i:. < iram-iM'gat i\ c. 



Isolation and Culture. Initial ;-TO\\||IS on arlilicial media outside 

 the animal hody are somewhat dillieiilt to "I. lam The organism 

 ap|)ears to grow he. I in a .;mne\\hal rarilied almo.phere. This ha - 

 heen ol.lained h\ l''al.\aii l hy growing tin- organism on an agar slant 

 \\hich i. ronneeled I iy a narrow tnhe \\ith an agar slant on which 

 I', nhlilis is growing. H. snhtilis appear, in so change the percentage 

 Composition <>!' the air ill the two tuhes that 15. ahortns grows fairly 

 irndil.v. Me al .< fmmd that a pressure of three to li\e a! nmsphcrcs 



I I In, -i MM-, h/.in. is7. i. I'll '_' v 



' nil .ill. I I I'.iiKt.. Ori K .. I'.MI.;. SSM ..... 



Joui Mtd is-- ':< i>. 10 13, avi, i u. 



