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100+ Free VTS (Clinical Pathology) Practice Questions

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Which stain is required to visualize reticulocytes in a blood smear?

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B
C
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Key Facts: VTS (Clinical Pathology) Exam

~$300

Exam Fee

AVCPT

3+ yrs

Minimum Clinical Path Experience

AVCPT

40+ hrs

Clinical Pathology CE Required

AVCPT

40+

Case Logs Required

AVCPT

4

Detailed Case Reports

AVCPT

2-part

Written + Practical Slide ID

AVCPT

The VTS (Clinical Pathology) is a specialty examination from the Academy of Veterinary Clinical Pathology Technicians (AVCPT). Eligible candidates must be credentialed veterinary technicians (CVT/LVT/RVT) with 3+ years of clinical pathology experience, 40+ case logs, 4 detailed case reports, 40+ hours of clinical pathology CE, and letters of recommendation. The exam consists of a written portion plus a practical slide identification component and costs approximately $300. AVCPT does not publicly publish pass rates.

Sample VTS (Clinical Pathology) Practice Questions

Try these sample questions to test your VTS (Clinical Pathology) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which stain is required to visualize reticulocytes in a blood smear?
A.Wright-Giemsa
B.New methylene blue (NMB)
C.Diff-Quik
D.Gram stain
Explanation: New methylene blue is a supravital stain that precipitates residual ribosomal RNA in immature red cells, allowing reticulocytes to be counted. Romanowsky stains show polychromasia but do not specifically identify reticulocytes for quantification.
2In cats, which reticulocyte form is used to assess active current regeneration?
A.Punctate reticulocyte
B.Aggregate reticulocyte
C.Howell-Jolly body
D.Heinz body
Explanation: Cats have two reticulocyte forms: aggregate (large RNA clumps, mature in ~12 hours) and punctate (fine dots, persist up to 3 weeks). Only aggregate reticulocytes reflect current, active regeneration and are used to classify feline anemia as regenerative.
3Rouleaux formation is a normal finding on blood smears from which species?
A.Dog
B.Cat
C.Horse
D.Cow
Explanation: Horses normally show prominent rouleaux (stacked coin appearance) due to high plasma fibrinogen. This must be distinguished from true agglutination by a saline dilution test, which disperses rouleaux but not agglutinated cells.
4Heinz body anemia in cats is MOST classically associated with which toxin?
A.Chocolate
B.Onion or acetaminophen
C.Lily
D.Xylitol
Explanation: Heinz bodies are denatured, oxidized hemoglobin precipitates attached to the RBC membrane. Cats are uniquely susceptible due to eight reactive sulfhydryl groups on feline hemoglobin. Onions, garlic, acetaminophen, zinc, and propylene glycol are classic oxidants.
5Basophilic stippling in a dog with non-regenerative anemia should prompt suspicion of which toxicity?
A.Zinc
B.Lead
C.Arsenic
D.Copper
Explanation: Basophilic stippling represents aggregated ribosomes and is highly suggestive of lead poisoning when seen with non-regenerative anemia and nRBCs disproportionate to the polychromasia. It can also appear transiently in strongly regenerative responses.
6Which finding is the strongest cytologic evidence of immune-mediated hemolytic anemia (IMHA) in a dog?
A.Polychromasia
B.Spherocytosis with autoagglutination
C.Echinocytosis
D.Target cells
Explanation: Spherocytes (small, dense, lacking central pallor) with true autoagglutination (persisting after saline dilution) are hallmark findings of IMHA. ACVIM Consensus criteria combine spherocytes, agglutination, or a positive Coombs test with signs of hemolysis.
7Per ACVIM Consensus, a dog meets criteria for IMHA when it shows signs of hemolysis plus how many immune markers?
A.One of: spherocytes, persistent agglutination, positive Coombs
B.All three markers simultaneously
C.Two positive markers only
D.Any positive ANA titer
Explanation: The 2019 ACVIM Consensus Statement requires evidence of hemolysis plus at least two signs of immune-mediated RBC destruction, but a single strong marker (e.g., persistent saline agglutination or >=2+ spherocytes in a dog) can be sufficient when combined with hemolysis.
8A dog's MCV is 55 fL (reference 64-75) and MCHC is 30 g/dL (reference 33-36). How is this anemia classified?
A.Macrocytic hyperchromic
B.Normocytic normochromic
C.Microcytic hypochromic
D.Macrocytic normochromic
Explanation: Low MCV (microcytic) and low MCHC (hypochromic) define microcytic hypochromic anemia, classically caused by chronic iron deficiency from blood loss. Microcytic non-hypochromic anemia can occur with portosystemic shunts and in some breeds (Akitas, Shibas).
9Macrocytic anemia without reticulocytosis in a cat should raise suspicion for which disease?
A.Chronic kidney disease
B.FeLV-associated myelodysplasia
C.Portosystemic shunt
D.Iron deficiency
Explanation: FeLV infection can produce non-regenerative macrocytic anemia due to myelodysplasia and abnormal erythroid maturation. Macrocytosis without polychromasia is a red flag for FeLV retrovirus testing in cats.
10What is the most appropriate interpretation of a corrected reticulocyte percentage of 4% in an anemic dog?
A.Non-regenerative
B.Pre-regenerative (2-4 days)
C.Adequately regenerative
D.Hyperregenerative
Explanation: A corrected reticulocyte percentage >1% or absolute count >60,000/uL in dogs indicates regeneration; values >3-4% corrected represent an adequate to marked regenerative response. Calculation: corrected % = observed % x (patient PCV / normal PCV).

About the VTS (Clinical Pathology) Exam

Advanced specialty credentialing exam for credentialed veterinary technicians pursuing Veterinary Technician Specialist status in Clinical Pathology. Administered by the Academy of Veterinary Clinical Pathology Technicians (AVCPT, avcpt.net) under NAVTA's Committee on Veterinary Technician Specialties (CVTS). The exam combines a written examination with a practical slide identification component covering hematology, cytology, chemistry, urinalysis, coagulation, and quality assurance.

Questions

100 scored questions

Time Limit

Approximately 4 hours (written + practical slide ID)

Passing Score

Set annually by Examination Committee

Exam Fee

~$300 exam + application fee (AVCPT / NAVTA CVTS)

VTS (Clinical Pathology) Exam Content Outline

22%

Hematology

CBC, reticulocyte aggregate vs punctate (cats), RBC morphology (Heinz bodies, Howell-Jolly, basophilic stippling, rouleaux, agglutination, polychromasia), leukocyte toxic change & left shift, Pelger-Huet, platelet estimate/clumping, anemia classification, IMHA (ACVIM criteria, Coombs)

18%

Cytology

FNA/impression/scraping/touch prep technique, Diff-Quik vs Wright-Giemsa vs NMB, inflammation patterns (neutrophilic, eosinophilic, mononuclear, granulomatous), round cell tumors (lymphoma, MCT, histiocytoma, plasma cell, TVT), epithelial vs mesenchymal, malignancy criteria, MCT grading, PARR/flow cytometry

18%

Chemistry

Liver (ALT, AST, ALP, GGT, bile acids, bilirubin, ammonia), kidney (BUN, creatinine, SDMA, IRIS CKD staging), glucose/fructosamine, pancreas (cPL, fPL), electrolytes/anion gap, acid-base & compensation, lipids, protein electrophoresis (monoclonal vs polyclonal), CK/troponin

10%

Urinalysis

USG species ranges (cat >1.035, dog >1.030), dipstick (pH, protein, glucose, ketones, bilirubin, blood), sediment (RBC, WBC, casts — hyaline/granular/waxy/cellular, crystals — struvite/oxalate/urate/cystine, bacteria, lipid droplets)

10%

Coagulation

PT/PTT, fibrinogen, D-dimer, thromboelastography (TEG), DIC diagnosis, rodenticide (vitamin K1), hemophilia A/B, von Willebrand disease (BMBT, vWF assay)

8%

Fluid Analysis

Effusion classification (transudate <2.5 g/dL TP, exudate >3.0, modified transudate), chylous (triglyceride > serum), septic vs non-septic (degenerate neutrophils, intracellular bacteria), CHF modified transudate

7%

Endocrinology Testing

LDDS & HDDS, ACTH stimulation, trilostane monitoring, T4, free T4 by equilibrium dialysis, endogenous TSH

7%

Quality Assurance & Control

Levey-Jennings charts, Westgard rules (1-2s warning, 1-3s, 2-2s, R-4s, 4-1s, 10-x), calibration, proficiency testing, reference intervals, POC vs reference lab

How to Pass the VTS (Clinical Pathology) Exam

What You Need to Know

  • Passing score: Set annually by Examination Committee
  • Exam length: 100 questions
  • Time limit: Approximately 4 hours (written + practical slide ID)
  • Exam fee: ~$300 exam + application fee

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

VTS (Clinical Pathology) Study Tips from Top Performers

1Memorize reticulocyte biology cold — in dogs and cats regenerative anemia shows aggregate reticulocytes (>60,000/uL in dogs, >50,000/uL in cats); cats also have punctate reticulocytes that do NOT count toward regeneration — use new methylene blue (NMB) to stain
2Master RBC morphology patterns — Heinz bodies (onion/garlic, zinc, acetaminophen in cats, propylene glycol), Howell-Jolly bodies (regeneration, post-splenectomy), basophilic stippling (lead toxicity, regeneration), rouleaux (normal in horses, pathologic elsewhere), agglutination (IMHA — confirm with saline dispersion)
3Know toxic neutrophil changes — Dohle bodies, cytoplasmic basophilia, vacuolation, toxic granulation, and distinguish from reactive lymphocytes and band neutrophils on a left shift
4Practice effusion classification — transudate (TP <2.5 g/dL, low cells), modified transudate (TP 2.5-3.0, CHF), exudate (TP >3.0, high cells), chylous (triglyceride > serum), septic (degenerate neutrophils + intracellular bacteria)
5Memorize Westgard rules — 1-2s (warning), 1-3s (reject, random error), 2-2s (reject, systematic), R-4s (reject, random), 4-1s (reject, systematic bias), 10-x (reject, shift) — and how to plot Levey-Jennings charts
6Review species-specific reference intervals and USG cutoffs — adequate concentrating ability requires cat USG >1.035 and dog USG >1.030; isosthenuria (1.008-1.012) in an azotemic patient supports renal disease

Frequently Asked Questions

What is the VTS (Clinical Pathology) exam?

The VTS (Clinical Pathology) certifying examination is the final step in earning the Veterinary Technician Specialist in Clinical Pathology credential from the Academy of Veterinary Clinical Pathology Technicians (AVCPT, avcpt.net), recognized by NAVTA's Committee on Veterinary Technician Specialties (CVTS). It is an advanced examination with both a written portion and a practical slide identification component, testing mastery of veterinary laboratory medicine — hematology, cytology, chemistry, urinalysis, coagulation, endocrine testing, fluid analysis, and laboratory quality assurance.

Who administers the VTS (Clinical Pathology) credential?

The Academy of Veterinary Clinical Pathology Technicians (AVCPT), at avcpt.net, administers the credential. AVCPT is the clinical pathology specialty academy recognized by NAVTA's CVTS. It sets eligibility criteria, reviews case logs and case reports, and delivers the written examination and practical slide identification component.

What are the eligibility requirements for VTS (Clinical Pathology)?

Candidates must (1) be credentialed veterinary technicians (CVT, LVT, RVT, or equivalent) in good standing, (2) have at least 3 years of clinical pathology-focused experience, (3) complete 40+ hours of clinical pathology-specific continuing education, (4) submit 40+ case logs, (5) submit 4 detailed case reports selected from the case log, and (6) provide letters of recommendation (typically from a boarded veterinary clinical pathologist — ACVP diplomate — or VTS in Clinical Pathology). Applications are reviewed in stages before a candidate is approved to sit for the exam.

How much does the VTS (Clinical Pathology) exam cost?

The examination fee is approximately $300, in line with other NAVTA VTS academies. Candidates should also budget for an application fee, 40+ hours of CE, textbooks (Harvey, Thrall, Valenciano & Cowell), access to slide study sets, travel for any in-person practical component, and time off work. Total preparation costs typically exceed $1,000 over the multi-year preparation window.

What is the passing score and pass rate?

AVCPT does not publicly publish a fixed passing percentage or annual pass rates. The passing score is set by the Examination Committee based on the difficulty of each year's exam. Both the written and practical slide identification components must be passed. Candidates who do not pass are generally allowed to re-sit in a future exam cycle per AVCPT policy.

How long should I study for the VTS (Clinical Pathology) exam?

Most candidates dedicate 6-12 months of intensive exam preparation on top of the multi-year experience, case log, and case report requirements. Core references include Harvey's Veterinary Hematology: A Diagnostic Guide and Color Atlas, Thrall's Veterinary Hematology, Clinical Chemistry, and Cytology, Valenciano & Cowell's Diagnostic Cytology and Hematology of the Dog and Cat, and Raskin & Meyer's Canine and Feline Cytology. Practicing with glass slide sets from an ACVP diplomate mentor is essential for the practical portion.

What's the difference between an ACVP clinical pathologist and a VTS (Clinical Pathology)?

An ACVP diplomate in clinical pathology is a veterinarian who has completed a clinical pathology residency and passed the American College of Veterinary Pathologists board exam — they are the doctor-level specialists who interpret and sign out slides. A VTS (Clinical Pathology) is a credentialed veterinary technician who has demonstrated advanced expertise in laboratory medicine through the AVCPT academy. Scope-of-practice rules mean final interpretation and diagnosis are performed by the veterinarian; VTS techs provide advanced sample preparation, staining, slide review/screening, instrument operation, quality control, and troubleshooting within their state practice act.