41. Aerobacter 



All the flagellated strains of Aerobacter are classified in the one 

 species, Aerobacter cloacae (Fig. 43). Eight strains of A. cloacae 

 were received from Dr. Sverre Dick Henrikson in Norway, and 

 one strain from Dr. Perry Wilson of the University of Wisconsin. 

 All strains were physiologically typical and motile. 



Flagellar Characteristics 



The flagellation of A. cloacae is very similar to that of Escheri- 

 chia and the paracolon group. Normal and coiled flagella were 

 most common, with two strains showing a few individuals with 

 curly flagella. Change in pH did not change the flagellar curva- 

 ture. The average normal wavelength for the ten strains was 2.77 

 microns, with a range of 2.59 to 2.90 microns. The curly flagellar 

 wavelengths averaged 1.17 microns. These wavelengths are not 

 significantly difterent from those of Escherichia and the paracolon 

 group as shown in Table VIII. 



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