316 



TUBERCLE GROUP— Continued. 



Bacterium tuberculosis var. avium (Kruse) Mig. 



Synonyms. Bacillus of fowl tuberculosis; Bacillus tuberculosis 

 avium Krusb. 



Explanatory. This organism was first separated from B. 

 tuberculosis by MafJucci, and is probably only a variety of the latter. 

 It is pathogenic for fowl, but ordinarily not for other animals. 



References. Maffucci, Z. fur H., 1892, 11, 445 ; C. 356 ; K. & 

 W. II, 127 ; L. & N. 418 ; Mig. 2, 495. 



Morphological CH.vR.iCTERS: 



1. Form and arrangement; 

 «. Bouillon 



Sketches. 



6. Agar . 



c. Gelatin 



d. Other media.. 



2. Size: 



3. Staining powers: 



a. Aqueous gentian-violet. . 



b. Loeffler's methylen-blue. 



c. Gram's stain 



d. Special stains 



4. Motility: 



a. Character of movement.. 



b. Plagella stain 



5. Spores: 



Special characters: 



a. Capsules 



b. Involution forms 



u. Deposits or vacuoles, . 

 d. Pleomorphism 



