Which of the following statements is the best definition of a pandemic disease?
a. It normally occurs in a given geographic area.
b, It is a disease that occurs more frequently than usual for a geographical area or group of people.
c. It occurs infrequently at no predictable time scattered over a large area or population.
d. It is an epidemic that occurs on more than one continent at the same time.

Consider the following case. An animal was infected with a virus. A mosquito bit the animal, was contaminated with the virus, and proceeded to bite and infect a person. Which was the vector?

a. Animal

b. Virus

c. Mosquito

d. Person

Which of the following types of epidemiologists is most like a detective?

a. Descriptive epidemiologist

b. Analytical epidemiologist

c. Experimental epidemiologist

d. Reservoir epidemiologist

A disease in which a pathogen remains inactive for a long period of time before becoming active is termed a(n) :

a. Subacute disease

b. Acute disease

c. Chronic disease

d. Latent disease

A patient contracted athlete’s foot after long-term use of a medication. His physician explained that the malady was directly related to the medication. Such infections are termed:

a. Healthcare-associated infections

b. Exogenous infections

c. Iatrogenic infections

d. Endogenous infections

Endotoxin, also known as ___________, is part of the outer (wall) membrane of Gram-negative bacteria.

When pathogenic bacterial cells lose the ability to make adhesins, they typically                  .

a. Become avirulent

b. Produce endotoxin

c. Absorb endotoxin

d. Increase in virulence