Exam 3 Quiz Questions Flashcards
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.
a. Clipping the hair coat prior to sampling dermal lesions
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?
lower temperature (indication is listeria)
Which class of molecules is deaminated by Gram-positive bacteria to build the lipids in their membranes?
branched-chain amino acids
Twitching motility requires which structure?
a. Type III Secretion System
b. Type IV pili
c. Flagella
d. Capsule
b. Type IV pili
Which protein is targeted by quinolone antibiotics?
DNA gyrase
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
b. all of the above
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?
whole genome sequencing of bacterial isolates
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
b. methane production by ruminants
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
a. improper regulation of the immune system
The delineation and naming of bacterial species is the result of a process best described as:
evolving and multifactorial
How would a canine urine sample with Escherichia coli appear on a stained slide?
gram-negative rod (pink)
A virology textbook from 2010 does not include some of the viruses in VET911 because:
new viruses are constantly emerging
Viruses can be classified by the:
a. All of the above
b. species targeted
c. Mode of transmission
d. Disease presentation
a. All of the above
T/F: Viruses are obligatory intracellular parasites
TRUE
Acidification (change in pH) of the endosome can:
Trigger uncoating
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
d. RNA genome copied into DNA
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
b. actin polymerization
How might lipopolysaccharide IMPROVE resistance to infection? By:
activating macrophages
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?
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.
What should be at the top of your differential list, if you see gray to black plaques in the respiratory tract?
aspergillus fumigatus
T/F: Overuse of antiviral compounds never leads to viral resistance.
FALSE
T/F: Host cell receptors are NOT a critical determinant of virus tropism.
FALSE
T/F: Immune memory is responsible for faster and robust responses against viral reinfection.
TRUE
After protein synthesis, viral proteins …
can be cleaved into mature proteins by viral proteases
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
c. It selects for mutations
Viruses with envelopes are more easily inactivated by alcohols and detergents than those that lack envelopes because the envelope contains
lipid
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
c. both A & B
Which of the following is a retroviral RNA-dependent DNA polymerase
a. DNase
b. Integrase
c. Protease
d. Reverse Transcriptase
d. reverse transcriptase
Not all viruses:
a. Penetrate
b. Replicate
c. Attach
d. Fuse
d. fuse
When a virus induces apoptosis …
cell dies and does not stimulate inflammation
