Biofilms Play a Major Role in Enhancing Bacterial Virulence Because

Multiple Choice

Biofilms play a major role in enhancing bacterial virulence because

A) biofilm strains are mutants.
B) the exopolymer matrix is highly toxic and mutagenic.
C) biofilm bacteria are intracellular pathogens.
D) bacteria in biofilms are more resistant to antimicrobials and phagocytosis.
E) low bacteria density does not alert the human immune system.