Exam 3 Quiz Questions

Question 1

Which of the following is the least likely to contaminate a sample for bacterial identification?

a. Clipping the hair coat prior to sampling dermal lesions.

b. Collecting a free-catch urine sample.

c. Sampling the nose for upper respiratory pathogens.

Answer 1

a. Clipping the hair coat prior to sampling dermal lesions

Question 2

Your dairy cattle client has an outbreak of neurological disease and abortions on his farm. When you submit samples for bacteriology, what culture condition could you request that would impair growth of contaminants?

Answer 2

lower temperature (indication is listeria)

Question 3

Which class of molecules is deaminated by Gram-positive bacteria to build the lipids in their membranes?

Answer 3

branched-chain amino acids

Question 4

Twitching motility requires which structure?

a. Type III Secretion System
b. Type IV pili
c. Flagella
d. Capsule

Answer 4

b. Type IV pili

Question 5

Which protein is targeted by quinolone antibiotics?

Answer 5

DNA gyrase

Question 6

Which of the following is bacteriophage therapy hindered by?

a. Evolution of resistance to phage by mutation of phage receptor

b. All of the above

c. CRISPR-mediated immunity

d. Lysogen

Answer 6

b. all of the above

Question 7

Two swine farms in a regional management group both experience outbreaks of E. coli-associated diarrhea in piglets. What bacterial identification technique would be most effective in determining if these outbreaks are linked to one another?

Answer 7

whole genome sequencing of bacterial isolates

Question 8

The Indigenous microbiome of the host animal is the primary cause of:

a. Progressive retinal atrophy in cats

b. Methane production by ruminants

c. Increased starch digestibility by dogs compared to wolves

d. Joint disorders in horses

Answer 8

b. methane production by ruminants

Question 9

The absence of a normal microbiome during early development in mammals is most strongly associated with what outcome in the adult animal?

a. Improper regulation of the immune system
b. Early cognitive decline
c. Deviations from normal anatomy
d. High variability in skin coloration and patterning

Answer 9

a. improper regulation of the immune system

Question 10

The delineation and naming of bacterial species is the result of a process best described as:

Answer 10

evolving and multifactorial

Question 11

How would a canine urine sample with Escherichia coli appear on a stained slide?

Answer 11

gram-negative rod (pink)

Question 12

A virology textbook from 2010 does not include some of the viruses in VET911 because:

Answer 12

new viruses are constantly emerging

Question 13

Viruses can be classified by the:

a. All of the above
b. species targeted
c. Mode of transmission
d. Disease presentation

Answer 13

a. All of the above

Question 14

T/F: Viruses are obligatory intracellular parasites

Answer 14

TRUE

Question 15

Acidification (change in pH) of the endosome can:

Answer 15

Trigger uncoating

Question 16

Retroviruses are unique because they have:

a. DNA genome that is copied into RNA
b. RNA genome that is copied into RNA
c. DNA genome that is copied into DNA
d. RNA genome that is copied into DNA

Answer 16

d. RNA genome copied into DNA

Question 17

Which mechanism of immune evasion/suppression allows UNDETECTED cell-to-cell spread of bacteria?

a. Prevention of phagosomal-lysosomal fusion
b. Actin polymerization
c. Opsonization prevention
d. Cytolysis

Answer 17

b. actin polymerization

Question 18

How might lipopolysaccharide IMPROVE resistance to infection? By:

Answer 18

activating macrophages

Question 19

Your canine patient is diagnosed with pulmonary blastomycosis. Your client is
concerned, because her son, who spends the most time with the dog, is also coughing.
What is the BEST way to address her concerns?

Answer 19

Blastomycosis is not contagious, but your son could have picked it up from the same source as the dog. Please let your pediatrician know about the dog’s diagnosis.

Question 20

What should be at the top of your differential list, if you see gray to black plaques in the respiratory tract?

Answer 20

aspergillus fumigatus

Question 21

T/F: Overuse of antiviral compounds never leads to viral resistance.

Answer 21

FALSE

Question 22

T/F: Host cell receptors are NOT a critical determinant of virus tropism.

Answer 22

FALSE

Question 23

T/F: Immune memory is responsible for faster and robust responses against viral reinfection.

Answer 23

TRUE

Question 24

After protein synthesis, viral proteins …

Answer 24

can be cleaved into mature proteins by viral proteases

Question 25

Viruses can be amplified in cell cultures but:

a. It’s expensive
b. It’s inconvenient
c. It selects for mutations
d. All of the above

Answer 25

c. It selects for mutations

Question 26

Viruses with envelopes are more easily inactivated by alcohols and detergents than those that lack envelopes because the envelope contains

Answer 26

lipid

Question 27

Nucleoside Analogs are drugs that inhibit polymerase function by the following mechanism:

a. Through chain termination
b. Through polymerase inactivation
c. Both A & B
d. None of the above

Answer 27

c. both A & B

Question 28

Which of the following is a retroviral RNA-dependent DNA polymerase

a. DNase
b. Integrase
c. Protease
d. Reverse Transcriptase

Answer 28

d. reverse transcriptase

Question 29

Not all viruses:

a. Penetrate
b. Replicate
c. Attach
d. Fuse

Answer 29

d. fuse

Question 30

When a virus induces apoptosis …

Answer 30

cell dies and does not stimulate inflammation