Exam 9: Immunity and Infection

What percentage of ulcers are caused by H pylori?

You can reduce your chance of getting sick by doing all of the following, EXCEPT

The ability of memory lymphocytes to remember previous infections is known as

Viral encephalitis causes inflammation of the tissue in the

Autoimmune diseases occur when

Rocky Mountain spotted fever and typhus are caused by rickettsias.

Warts on the hands are caused by infection with a type of

Approximately how many Canadians die of influenza annually?

Hepatitis B is transmitted mainly by

Encephalitis is characterized by all of the following, EXCEPT:

When the body recognizes a relatively harmless substance as a dangerous antigen and mounts an immune response, this response is called

Viral diseases are the most common form of disease.

Which of the following diseases is commonly known as the "kissing disease"?

Illnesses caused by viruses are the most common forms of contagious disease.

All bacteria are harmful to the body.

List the six general classes of pathogens described in your text; give at least one example of a disease caused by each type of pathogen.

The two main types of lymphocytes are T cells and B cells.

Microscopic, single-celled organisms that often cause recurrent diseases are called

During this type of immune system response, the body's defense system literally eats invading pathogens.

An example of an infection that was spread widely via air travel by infected people is