EXERCISE 59. SAPEOPHILIC CLASS. 95 



Bacillus vulgatus Trevisan. 



SYNONYMS. Bacillus mesentericus vulgatus Fluegge ; Potato 

 bacillus. 



EXPLANATORY. This is a widely distributed organism which was 

 first described by Fluegge in 1886. Its spores are very resistant and 

 can almost invariably be found on potatoes. It can usually be ob- 

 tained by boiling potatoes for a half an hour, halving them and incu- 

 bating in a sterile moist chamber. 



REFERENCES. Fluegge : Die Mikroorganismen, 1886 ; C. 271 ; L. 

 & N. 323 ; Mig. 2 : 556. 



MORPHOLOGICAL CHARACTERS : 



1. FORM AND ARRANGEMENT: 

 a. Bouillon 



SKETCHES. 



&. Agar 



c. Gelatin. 



d. Other media. 



2. SIZE: 



3. STAINING POWERS : 



a. Aqueous gentian- violet. . 

 6. Loeffler's methylen-blue. 



c. Gram's stain 



d. Special stains 



4. MOTILITY : 



a. Character of movement.. 

 &. Flagella stain 



5. SPORES:. 



6. SPECIAL, CHARACTERS: 



a. Capsules 



&. Involution forms 



c. Deposits or vacuoles. 



d. Pleomorphism 



