Deck 19: Tumor Immunology

Question 1

Antibodies detected by reacting rickettsial antigens with specific antibody followed by use of an anti-immunoglobulin with a fluorescent tag could be used to diagnose:

A) Rocky Mountain spotted fever
B) Mycoplasma pneumonia
C) stomach ulcers
D) rheumatic fever

Answer 1

Rocky Mountain spotted fever

Question 2

Which of the following statements best describes Helicobacter pylori?

A) It is a gram-positive coccus that causes skin infections.
B) It is a gram-negative spiral that causes ulcers.
C) It lacks a cell wall and produces a lot of acid.
D) It can be detected by testing for cold agglutinins.

Answer 2

It is a gram-negative spiral that causes ulcers.

Question 3

Antibodies against streptolysin O,hyaluronidase,and DNase B are measured in the diagnosis of which disease?

A) streptococcal pharyngitis
B) rheumatic fever
C) rheumatoid arthritis
D) systemic lupus erythematosus

Answer 3

rheumatic fever

Question 4

What is the main reason testing for cold agglutinins is no longer recommended to diagnose infection with Mycoplasma pneumonia?

A) It is difficult to perform.
B) False-positives may be caused by certain viruses.
C) Very few people develop anti-I antibodies.
D) It requires expensive instrumentation.

Question 5

An ASO test was performed on the serum from a 10-year-old female patient with the following results: no hemolysis in the 1:10,1:20,1:40,and 1:80 tubes; and hemolysis in the 1:160,1:320,and 1:640 tubes.What conclusion can you draw from these results?

A) The titer is 1:640,and the patient may have glomerulonephritis.
B) The titer is 1:160,and the patient may have rheumatic fever.
C) The titer is 1:80,and the patient is normal.
D) The test is invalid and must be repeated.

Question 6

Organisms that are short rods or coccobacilli and obligate intracellular bacteria best describes:

A) Streptococcus pyogenes
B) Helicobacter pylori
C) Rickettsia prowazekii
D) Mycoplasma pneumonia

Question 7

Which of the following bacterial enzymes causes the release of lysosomal contents into the cytoplasm of the phagocytic cell,leading to the death of the cell?

A) protein H
B) leukocidin
C) M protein
D) IgA protease

Question 8

How does complement help in defense against bacterial invasion?

A) It promotes phagocytosis.
B) It neutralizes bacterial toxins.
C) It prevents bacteria from penetrating the skin.
D) It fuses lysosomal granules to bacterial cell walls.

Question 9

Acute glomerulonephritis is due to:

A) deposition of immune complexes in the kidney
B) destruction of glomeruli by Streptolysin O
C) formation of cross-reacting antibodies
D) invasion of the kidney by Streptococcus pyogenes

Question 10

All of the following are tests used to identify Helicobacter pylori EXCEPT:

A) polymerase chain reaction
B) urease
C) enzyme immunoassay
D) DNase