EXERCISE 86. INFLUENZA GROUP. 211 



Bacterium influenzae (Pfeiffer) L. & N. 



Synonym. Bacillus influenzae Pfeipfee. 



Explanatory. First described in 1892 by R. Pfeiffer. Found 

 in the sputum and in nasal secretions of the diseased. 



References. Pfeiffer, Z. f . ,H. 1993, 13 ; 357 ; A. 371 ; C. 351 ; 

 Fl. 2 ; 434 ; H. 316 ; K. & W. Ill, 359 ; L. & N. 202 ; Mig. 2, 506 ; M. & 

 R. 430 ; McF. 574 ; P. 320. 



Morphological characters : 



Sketches. 



1. Form and arrangement: 

 u.. Bouillon 



6. Agar . 



c. Gelatin. 



d. Other media.. 



2. Size: 



3. Staining powers: 



u. Aqueous gentian- violet. . 

 6. LoefHer's methylen-blue. 



c. Gram's stain 



d. Special stains 



4. Motility : 



a. Character of movement. . . 



b. Flagella stain 



5. Spores: 



Special characters:.... 



u. Capsules 



6. Involution forms 



u. Deposits or vacuoles. . 

 d. Pleomorphism 



