Flagellar Characteristics 



Some of the cultures were well flagellated, others very poorly 

 flagellated (see Figs. 52 and 53). The flagellar arrangement was 

 peritrichous in all cultures. Three types of flagellar curvature 

 were observed: normal, curly, and coiled. A few species showed 

 normal flagella only. Some strains of Bacillus macerans and of 

 B. pasteurii showed only curly flagella, other strains only normal 

 flagella, and still other strains a mixture with some individuals 

 with curly flagella, some with normal flagella, but not both kinds 

 of flagella on the same individual. In several other species normal 

 and curly flagella were found on the same individual. Also in 

 several species the same individual might show normal and coiled 

 flagella, and even normal, curly, and coiled. Bacillus subtilis and 

 Bacillus pumilus showed the greatest tendency to produce coiled 

 flagella. One strain of B. macerans was quite unique with onlv 

 short, stiff curly flagella with shorter wavelength than the curly 



Fig. 53. k. Bacillus circulans, NRRL B-378. Normal flagella of rather short 

 wavelength. 



1. B. aZuet, NRS-811. Normal flagella. 



m. B. foreuts, NRS-1138. Normal flagella. 



n. B. sphaericus, NRS-348. Normal flagella. This strain also showed some 

 coiling. 



o. B. pasteurii, NRS-673. Normal flagella. 



p. B. pasteurii, NRS-674. Curly flagella. 



q. Bacillus sp., A-J. This picture is from a culture labeled bacillus A-J, re- 

 ceived from Dr. Eleanor Alexander-Jackson. It is claimed by the donor to 

 cause human cancer and was isolated from human cancerous tissue. The 

 flagellar morphology is very similar to B. cereus with flagella of two distinct 

 wavelengths. 



r. B.stearothermophilus, NRRL B-1172. Normal flagella. This was the 

 only thermophile studied. 



s. B. lentus, NRRL B-396. Normal and coiled flagella. 



t. B.coagulans, NRRL B-1167. Normal flagella. " 



126 



