DVM Doctor of Veterinary Medicine MCQ 5 — Questions and Answers
Question 1: Which layer of the cornea is responsible for providing the majority of the cornea's tensile strength?
- Corneal epithelium
- Bowman's layer
- Corneal stroma (Correct answer)
- Descemet's membrane
Correct answer: Corneal stroma
The corneal stroma comprises approximately 90% of corneal thickness and consists of organized collagen lamellae, providing the majority of tensile strength.
Question 2: A dog is diagnosed with dilated cardiomyopathy. Which breed has the highest predisposition and is associated with taurine deficiency as a cause?
- Doberman Pinscher
- American Cocker Spaniel (Correct answer)
- Boxer
- Great Dane
Correct answer: American Cocker Spaniel
American Cocker Spaniels have the highest documented association between DCM and taurine deficiency, often responding to taurine supplementation.
Question 3: During a bovine dystocia, the calf's head is present but both forelimbs are retained. What maneuver corrects this presentation?
- Repulsion of the head and manual flexion of forelimbs into the birth canal (Correct answer)
- Immediate cesarean section
- Application of obstetrical chains to the head only and traction
- Fetotomy to remove the head
Correct answer: Repulsion of the head and manual flexion of forelimbs into the birth canal
The head must be repelled using a head snare or hand to create space while the forelimbs are individually flexed and brought into the birth canal before applying traction.
Question 4: Which clotting factor deficiency is responsible for Hemophilia A in dogs?
- Factor VII
- Factor VIII (Correct answer)
- Factor IX
- Factor XI
Correct answer: Factor VIII
Hemophilia A is caused by a deficiency of Factor VIII (anti-hemophilic factor A), the most common inherited coagulopathy in dogs.
Question 5: A reptile patient has bilateral swollen eyelids and copious mucoid ocular discharge. The condition is not true conjunctivitis. What is the correct diagnosis?
- Hypovitaminosis A causing subspectacular abscess (Correct answer)
- Infectious stomatitis
- Thermal burn
- Corneal ulceration
Correct answer: Hypovitaminosis A causing subspectacular abscess
Hypovitaminosis A in reptiles causes squamous metaplasia of lacrimal ducts, leading to fluid accumulation behind the spectacle (subspectacular abscess), mimicking eye swelling.
Question 6: Which statistical test is most appropriate for comparing the means of three or more independent groups in a veterinary clinical study?
- Student's t-test
- Chi-square test
- One-way ANOVA (Correct answer)
- Pearson correlation
Correct answer: One-way ANOVA
One-way ANOVA (analysis of variance) is used to compare means across three or more independent groups while controlling the overall type I error rate.
Question 7: A foal develops profuse diarrhea and septicemia at 3 days of age. Which pathogen is the most common cause of neonatal septicemia in foals in the US?
- Clostridium perfringens
- Escherichia coli (Correct answer)
- Rhodococcus equi
- Actinobacillus equuli
Correct answer: Escherichia coli
Escherichia coli is the most common gram-negative bacterium causing neonatal septicemia in foals, particularly in those with failure of passive transfer.
DVM Doctor of Veterinary Medicine MCQ 5
Which layer of the cornea is responsible for providing the majority of the cornea's tensile strength?