The Emergence of Lyme Disease Was Most Likely a Result

Multiple Choice

The emergence of Lyme disease was most likely a result of:

A) an increase in virulence of the spirochete.
B) a change in human activity that allowed for an increased risk for contact with the pathogen.
C) a mutation in an existing spirochete that allowed for increase spread between humans.
D) a rare zoonotic transfer of the spirochete strain to humans.
E) an increase in the tick population.