A Group of Experts Is Looking at the Substances That

A group of experts is looking at the substances that cause infections in immunocompromised people. The trial includes patients with solid-organ cancer who have received standard treatment. Any patient who gets fever during chemotherapy-induced neutropenia has detailed microbiologic data collected. Which of the following infections is most likely to be found in the vast majority of these patients?

A) Environmental, opportunistic pathogens
B) Hospital-acquired, drug-resistant bacteria
C) Pathogens spread from infected contacts
D) Patient's own endogenous bacterial flora
E) Previously latent, reactivated pathogens