Which of the following is NOT a common virulence factor associated with Enterobacteriaceae:

Which of the following is NOT a common virulence factor associated with Enterobacteriaceae:

Which of the following is NOT a common virulence factor associated with Enterobacteriaceae:



A. Capsule
B. Endotoxin
C. Type III secretion systems
D. Antibody phase variation
E. Resistance to serum killing


Answer: D