VTNE Clinical Laboratory Procedures 3

Question 1

What is the primary purpose of using a Romanowsky-type stain (e.g., Diff-Quik) on a blood smear?

Accepted Answer

To differentiate and identify blood cell types and morphology

Answer

Romanowsky-type stains like Diff-Quik use methylene blue and eosin to distinguish and characterize leukocytes, erythrocytes, and platelets by color.

Question 2

In urinalysis, the presence of bilirubin in a cat's urine is considered:

Accepted Answer

Always abnormal and clinically significant

Answer

Unlike dogs, cats have a very high renal threshold for bilirubin, so any bilirubinuria in cats is considered abnormal and clinically significant.

Question 3

Which blood chemistry panel finding is most consistent with Addison's disease (hypoadrenocorticism) in a dog?

Accepted Answer

Hyperkalemia and hyponatremia

Answer

Addison's disease causes decreased aldosterone, leading to sodium loss and potassium retention, resulting in hyponatremia and hyperkalemia.

Question 4

When reading a urine dipstick result for protein, which sample characteristic can cause a false-positive reaction?

Accepted Answer

Highly alkaline urine (pH > 8)

Answer

Highly alkaline urine can cause false-positive protein results on dipstick because the colorimetric reaction is pH-dependent.

Question 5

Which finding on a canine CBC is most indicative of immune-mediated hemolytic anemia (IMHA)?

Accepted Answer

Spherocytes and positive Coombs test

Answer

Spherocytes result from partial phagocytosis of antibody-coated RBCs, and a positive Coombs test confirms immune-mediated destruction.

VTNE - Veterinary Technician National Examination Practice Test