Why Is the Gram-Negative Spirochete Treponema Pallidum Able to Evade

Multiple Choice

Why is the Gram-negative spirochete Treponema pallidum able to evade immune system detection? (Select all that apply)

A) there are not very many antigenic proteins imbedded in the LPS of the outer membrane
B) the single flagellum is hidden as an axial filament under the outer membrane of the cell wall
C) immune system detection occurs only after an individual cell dies leaving the living progeny able to cause disease
D) T. pallidum can hide inside living cells