AAVSB Clinical Pathology and Laboratory Diagnostics 2

Question 1

Which coagulation test specifically evaluates the extrinsic and common pathways?

Accepted Answer

Prothrombin time (PT)

Answer

PT measures the time for clot formation via the extrinsic pathway (factor VII) and common pathway (factors X, V, II, I).

Question 2

A cat presents with marked thrombocytopenia (platelets 12,000/µL). Which clinical sign is most expected?

Accepted Answer

Petechiae and ecchymoses

Answer

Severe thrombocytopenia impairs primary hemostasis, leading to petechiae and mucosal bleeding rather than deep hemorrhage.

Question 3

A dog with parvovirus has a WBC of 1,200/µL with 80% neutrophils and a left shift. How is this finding classified?

Accepted Answer

Neutropenia with degenerative left shift

Answer

Neutropenia with a degenerative left shift (more bands than segs) reflects overwhelming demand exceeding bone marrow production, common in parvovirus.

Question 4

Which fecal flotation solution has the highest specific gravity and is best for recovering most parasite ova?

Accepted Answer

Sheather's sugar solution (SG 1.27)

Answer

Sheather's sugar solution (SG ~1.27) has the highest specific gravity, allowing recovery of a broader range of eggs including heavy ones.

Question 5

A bovine blood sample shows packed cell volume (PCV) of 12% and plasma that appears pink. What does the pink plasma indicate?

Accepted Answer

Intravascular hemolysis releasing free hemoglobin

Answer

Pink (hemolyzed) plasma combined with severe anemia points to intravascular hemolysis and free hemoglobin release into circulation.

AAVSB - American Association of Veterinary State Boards Practice Test

AAVSB - American Association of Veterinary State Boards Practice Test

AAVSB Clinical Pathology and Laboratory Diagnostics 2