L2 (Review Questions) - Diagnostic Bacteriology

Question 1

Humoral immune response is measured by screening for;

A. Antibodies
B. Antigen
C. T cells
D. Macrophages

Answer 1

Antibodies

Question 2

Ability of a test to accurately identity a infected animals as positive is known as;

A. Sensitivity
B. Specificity

Answer 2

Sensitivity

Question 3

Ability of a test to accurately identity a infected animals as negative is known as;

A. Sensitivity
B. Specificity

Answer 3

Specificity

Question 4

Which of the following is not acceptable practice in sample collection?

A. Urine collected by free catch
B. Urine collected by catheter
C. Urine collected by cystocentesis
D. Urine collected and shipped to the lab in a syringe with needle attached to it

Answer 4

D. Urine collected and shipped to the lab in a syringe with needle attached to it

Note: Remove the needle; it is a safety issue

The best sample is collected by cystocentesis

Question 5

Which of the following statement is INCORRECT about antibody titer?

A. It is the last (highest) dilution of the serum at which antibodies are detected in a test
B. Determination of antibody titer can be used for diagnosis of infectious disease
C. Detection of antibody titer at any stage of infection is sufficient to detect an active infection
D. A four fold increase between serum samples collected at acute and convalescent stages of disease is indicative of an active infection

Answer 5

C. Detection of antibody titer at any stage of infection is sufficient to detect an active infection

Question 6

Results from serum testing for brucellosis
Animal x; Serum titer = 1/100
Animal y; Serum titer = 1/800
Interpretation; Animal Y has higher levels of antibody than animal X

True or False ?

Answer 6

True

Note: Know titers well !!!!; More number = more antibodies

Question 7

A disease can be diagnosed by identifying the infectious agent and the host immune response?

True or False

Answer 7

True

Note: You can look for the agent or you can look for the immune response