EXERCISE 64. SAPROGENIC CLASS. 

 Bacillus vulgaris (Hauser) Mig. 



113 



SYNONYMS. Proteus vulgaris Hauser. B. proteus Trevisan. 



EXPLANATORY. First described by Hauser. It is widely dis- 

 tributed and is commonly found in putrefactive substances. It is 

 one of several related species included under the old name of ' ' Bac- 

 terium termo." While in small doses and under ordinary condi- 

 tions it is harmless, at times, and in large doses, it may be patho- 

 genic. 



REFERENCES. Hauser, Ueber Faulnisbakterien, 1885 ; C. 244 ; 

 Lafar, 194-199. Mig. 2 : 707. 



MORPHOLOGICAL CHARACTERS : 



SKETCHES. 



1. FORM AND ARRANGEMENT: 



a. Bouillon 



6. Agar 



c. Gelatin 



d. Other media 



2. SIZE: 



3. STAINING POWERS : 



a. Aqueous gentian- violet. . 

 &. Loeffler's methylen-blue . 



c. Gram's stain 



d. Special stains 



4. MOTILITY: 



a. Character of movement. . 

 6. Flagella stain 



5. SPORES : 



. SPECIAL CHARACTERS: 



a. Capsules 



6. Involution forms 



c. Deposits or vacuoles 



d. Pleomorphism 



