Which is Not a Characteristic of Spirochetes

Question

Which is not a characteristic of spirochetes?
A)all are pathogenic
B)gram-negative
C)helical shape
D)always motile
E)endoflagella enclosed in periplasmic space

Accepted Answer

Not all spirochetes are pathogenic. While some species of spirochetes such as Treponema pallidum and Borrelia burgdorferi can cause serious infections in humans, there are also nonpathogenic or beneficial spirochetes found in various environments such as soil, water or animal guts.