Which of the following statements describes a true pathogen?

Penicillins and cephalosporins:

All of the following features represent potential virulence factors for bacteria except:

Important characteristics of antimicrobial drugs includes all of the following except:

Sulfonamides (sulfa drugs), like trimethoprim,:

Which of the following is not a common portal of exit for an infectious agent?

Sulfonamides (sulfa drugs), like trimethoprim,:

Which of the following types of control agents would be used to achieve sterility?

The leading cause of infection-related blindness throughout the world, with its highest incidence among children between the ages of three and five, is:

Which of the following is a unit of concentration?