46. Pasteurella 



Pasteurella pseudotuberculosis appears to be the only species 

 in the Pasteurella genus which is flagellated (Fig. 49). One strain 

 was received from the University of California School of Medi- 

 cine, San Francisco. Flagellation of this strain at temperatures 

 between 20° and 30° C. was fair and the organism showed peri- 

 trichous flagella of long and very irregular wavelength, averaging 

 3.2 microns, with an amplitude about 0.8 micron. 



Fig. 48. m. S. tijphimurium, Fulton. A filamentous form with normal peri- 

 trichous flagella. 



116 



