EXERCISE 88. COLON GROUP. 



Bacillus coli (ESCHERICH) MIG. 

 SYNONYMS. Bacterium coli commune ESCH. ; Colon bacillus. 



EXPLANATORY. Escherich was the first to describe this organism 

 which is widely known as a common inhabitant of the colon of man, 

 and of some of the lower animals. 



REFERENCES. Escherich, Darmbakt. des Sauglings, Stuttgart, 

 1886 ; A. 432 ; C. 205 ; H. 282 ; K. & W. II, 334 ; L. & N. 243 ; Mig. 2, 

 734 ; M. & R. 325 ; McF. 510. 



MORPHOLOGICAL CHARACTERS : 



! SKETCHES. 



1. FORM AND ARRANGEMENT: 



a. Bouillon 



&. Agar 



c. Gelatin 



d. Other media 



2. SIZE: 



3. STAINING POWERS: 



a. Aqueous gentian- violet.. 



5. Loeffier's methylen-blue. 



c. Gram's stain 



d. Special stains 



4. MOTILIT Y : 



a. Character of movement.. 



6. Flagella stain 



5. SPORES: 



6. SPECIAL CHARACTERS: 



a. Capsules 



b. Involution forms 



c. Deposits or vacuoles.. . . 



d. Pleomorphism 



