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ACVPM - Practice Test - Questions &
Answers
Solved 100% Correct |
Edition · ACVPM Practice Review
150 5 100%
QUESTIONS SECTIONS RATIONALES
WHAT THIS COVERS
Epidemiology Foundations Biostatistics
Terms, study designs, bias Measures of effect, p-values, CI
Disease Investigation Bacterial Zoonoses
Outbreak steps, surveillance Brucellosis, TB, anthrax, leptospirosis
Viral Zoonoses Parasitic Zoonoses
Rabies, influenza, WNV, RVF Toxoplasmosis, trichinellosis, echinococcus
Food Safety Principles Meat & Poultry Hygiene
HACCP, pathogens, traceback Antemortem, postmortem inspection
Environmental Health Toxicology
ABOUT THIS
Water, waste, ASSESSMENT
vector control Pesticides, heavy metals, mycotoxins
Disaster of
Purpose & Emergency Response
This Review Program Management
ICS, ACVPM
This foreign animal disease
practice Surveillance
review addresses the core domains examined design, evaluation
by the American College of Veterinary
Preventive Medicine. Items span epidemiology, infectious and zoonotic diseases, food safety, environmental
health, toxicology, and program management. Each rationale reinforces the principle tested and links it to field
application.
Domains Covered
Domains include (1) epidemiology and biostatistics, (2) infectious and zoonotic diseases, (3) food safety and meat
hygiene, (4) environmental health and toxicology, and (5) veterinary public health, disaster response, and
program management. The largest weighting is on epidemiology and zoonotic disease because these constitute the
highest-yield content in board-style preventive medicine examinations.
How to Use This Review
STUVIA ACTUAL EXAM
,ACVPM | Practice Test - Questions & Answers Edition
SECTION 1: EPIDEMIOLOGY & BIOSTATISTICS
This section reviews epidemiological study designs, measures of effect, bias, and biostatistical inference.
1. Which study design is most appropriate for investigating a rare disease?
A. Case-control
B. Cohort
C. Cross-sectional
D. Ecological
✓ Correct Answer: A
Rationale: Case-control studies are optimal for rare diseases because they begin with cases rather than
waiting for disease to develop. Cohort studies are inefficient for rare outcomes.
2. In a 2x2 table, the odds ratio is calculated as:
A. (a*d)/(b*c)
B. (a/b)/(c/d)
C. a/(a+b)
D. a/(a+c)
✓ Correct Answer: A
Rationale: The odds ratio = (a*d)/(b*c) where a = exposed cases, b = exposed controls, c = unexposed cases, d
= unexposed controls. Both expressions (a*d)/(b*c) and (a/b)/(c/d) are mathematically equivalent.
3. Which measure of disease frequency represents new cases during a defined time period?
A. Incidence
B. Prevalence
C. Mortality
D. Case fatality
✓ Correct Answer: A
Rationale: Incidence measures new cases occurring in a population at risk during a specified time period.
Prevalence measures all existing cases at a point in time.
4. A study reports an odds ratio of 1.0. This indicates:
A. No association
B. Strong positive association
C. Strong negative association
D. Confounding present
✓ Correct Answer: A
Rationale: An OR of 1.0 indicates no association between exposure and outcome. OR > 1 suggests positive
association; OR < 1 suggests protective association.
STUVIA ACTUAL EXAM Page 1
,ACVPM | Practice Test - Questions & Answers Edition
5. Which type of bias occurs when cases and controls remember exposures differently?
A. Recall bias
B. Selection bias
C. Confounding
D. Detection bias
✓ Correct Answer: A
Rationale: Recall bias occurs when cases (who are motivated to identify a cause) recall exposures differently
than controls. It is a common limitation of case-control studies.
6. The p-value in hypothesis testing represents:
A. Probability of observing results as extreme if null is true
B. Probability the null is true
C. Probability of clinical significance
D. Probability of Type II error
✓ Correct Answer: A
Rationale: The p-value is the probability of obtaining results at least as extreme as observed, assuming the
null hypothesis is true. It does not indicate the probability that the null is true.
7. A 95% confidence interval means that:
A. If study repeated many times, 95% of intervals would contain true parameter
B. 95% of sample values fall within
C. There is 95% probability the parameter is in this interval
D. 5% probability the result is wrong
✓ Correct Answer: A
Rationale: A 95% CI means that if the study were repeated many times, 95% of constructed intervals would
contain the true parameter. It is a property of the procedure, not a specific interval.
8. Type I error (alpha) refers to:
A. Rejecting a true null hypothesis
B. Failing to reject a false null
C. Confounding
D. Bias
✓ Correct Answer: A
Rationale: Type I error (alpha) is rejecting a true null hypothesis (false positive). Type II error (beta) is failing
to reject a false null (false negative).
9. Power of a study is defined as:
A. 1 - beta
B. 1 - alpha
C. alpha + beta
D. 1 - p-value
✓ Correct Answer: A
Rationale: Power = 1 - beta, where beta is the probability of Type II error. Power is the probability of
correctly rejecting a false null hypothesis.
STUVIA ACTUAL EXAM Page 2
, ACVPM | Practice Test - Questions & Answers Edition
10. Which measure is most appropriate for assessing the burden of disease in a population?
A. Prevalence
B. Incidence
C. Mortality rate
D. Case fatality rate
✓ Correct Answer: A
Rationale: Prevalence reflects the total burden of disease in a population at a given time. Incidence measures
new cases; mortality measures deaths; case fatality measures severity.
11. A study that follows a group of individuals forward in time to compare disease incidence among
exposed and unexposed is a:
A. Cohort
B. Case-control
C. Cross-sectional
D. Ecological
✓ Correct Answer: A
Rationale: Cohort studies follow individuals forward in time, comparing disease incidence between exposed
and unexposed groups. They are optimal for rare exposures.
12. The attributable risk represents:
A. Risk in exposed minus risk in unexposed
B. Risk in exposed divided by risk in unexposed
C. Total population risk
D. Risk ratio expressed as percent
✓ Correct Answer: A
Rationale: Attributable risk = risk in exposed - risk in unexposed. It measures the absolute excess risk
attributable to the exposure. Relative risk is the ratio of risks.
13. Which sampling method ensures every individual has an equal probability of selection?
A. Simple random
B. Convenience
C. Snowball
D. Purposive
✓ Correct Answer: A
Rationale: Simple random sampling gives each individual an equal probability of selection. Other methods
(convenience, snowball, purposive) introduce selection bias and limit generalizability.
14. A confounder must be:
A. Associated with the exposure only
B. Associated with the outcome only
C. Associated with both exposure and outcome but not on causal pathway
D. A random variable
✓ Correct Answer: C
Rationale: A confounder is associated with both exposure and outcome, is not on the causal pathway, and
distorts the observed association. Control methods include stratification, matching, and multivariable
modeling.
STUVIA ACTUAL EXAM Page 3
ACVPM - Practice Test - Questions &
Answers
Solved 100% Correct |
Edition · ACVPM Practice Review
150 5 100%
QUESTIONS SECTIONS RATIONALES
WHAT THIS COVERS
Epidemiology Foundations Biostatistics
Terms, study designs, bias Measures of effect, p-values, CI
Disease Investigation Bacterial Zoonoses
Outbreak steps, surveillance Brucellosis, TB, anthrax, leptospirosis
Viral Zoonoses Parasitic Zoonoses
Rabies, influenza, WNV, RVF Toxoplasmosis, trichinellosis, echinococcus
Food Safety Principles Meat & Poultry Hygiene
HACCP, pathogens, traceback Antemortem, postmortem inspection
Environmental Health Toxicology
ABOUT THIS
Water, waste, ASSESSMENT
vector control Pesticides, heavy metals, mycotoxins
Disaster of
Purpose & Emergency Response
This Review Program Management
ICS, ACVPM
This foreign animal disease
practice Surveillance
review addresses the core domains examined design, evaluation
by the American College of Veterinary
Preventive Medicine. Items span epidemiology, infectious and zoonotic diseases, food safety, environmental
health, toxicology, and program management. Each rationale reinforces the principle tested and links it to field
application.
Domains Covered
Domains include (1) epidemiology and biostatistics, (2) infectious and zoonotic diseases, (3) food safety and meat
hygiene, (4) environmental health and toxicology, and (5) veterinary public health, disaster response, and
program management. The largest weighting is on epidemiology and zoonotic disease because these constitute the
highest-yield content in board-style preventive medicine examinations.
How to Use This Review
STUVIA ACTUAL EXAM
,ACVPM | Practice Test - Questions & Answers Edition
SECTION 1: EPIDEMIOLOGY & BIOSTATISTICS
This section reviews epidemiological study designs, measures of effect, bias, and biostatistical inference.
1. Which study design is most appropriate for investigating a rare disease?
A. Case-control
B. Cohort
C. Cross-sectional
D. Ecological
✓ Correct Answer: A
Rationale: Case-control studies are optimal for rare diseases because they begin with cases rather than
waiting for disease to develop. Cohort studies are inefficient for rare outcomes.
2. In a 2x2 table, the odds ratio is calculated as:
A. (a*d)/(b*c)
B. (a/b)/(c/d)
C. a/(a+b)
D. a/(a+c)
✓ Correct Answer: A
Rationale: The odds ratio = (a*d)/(b*c) where a = exposed cases, b = exposed controls, c = unexposed cases, d
= unexposed controls. Both expressions (a*d)/(b*c) and (a/b)/(c/d) are mathematically equivalent.
3. Which measure of disease frequency represents new cases during a defined time period?
A. Incidence
B. Prevalence
C. Mortality
D. Case fatality
✓ Correct Answer: A
Rationale: Incidence measures new cases occurring in a population at risk during a specified time period.
Prevalence measures all existing cases at a point in time.
4. A study reports an odds ratio of 1.0. This indicates:
A. No association
B. Strong positive association
C. Strong negative association
D. Confounding present
✓ Correct Answer: A
Rationale: An OR of 1.0 indicates no association between exposure and outcome. OR > 1 suggests positive
association; OR < 1 suggests protective association.
STUVIA ACTUAL EXAM Page 1
,ACVPM | Practice Test - Questions & Answers Edition
5. Which type of bias occurs when cases and controls remember exposures differently?
A. Recall bias
B. Selection bias
C. Confounding
D. Detection bias
✓ Correct Answer: A
Rationale: Recall bias occurs when cases (who are motivated to identify a cause) recall exposures differently
than controls. It is a common limitation of case-control studies.
6. The p-value in hypothesis testing represents:
A. Probability of observing results as extreme if null is true
B. Probability the null is true
C. Probability of clinical significance
D. Probability of Type II error
✓ Correct Answer: A
Rationale: The p-value is the probability of obtaining results at least as extreme as observed, assuming the
null hypothesis is true. It does not indicate the probability that the null is true.
7. A 95% confidence interval means that:
A. If study repeated many times, 95% of intervals would contain true parameter
B. 95% of sample values fall within
C. There is 95% probability the parameter is in this interval
D. 5% probability the result is wrong
✓ Correct Answer: A
Rationale: A 95% CI means that if the study were repeated many times, 95% of constructed intervals would
contain the true parameter. It is a property of the procedure, not a specific interval.
8. Type I error (alpha) refers to:
A. Rejecting a true null hypothesis
B. Failing to reject a false null
C. Confounding
D. Bias
✓ Correct Answer: A
Rationale: Type I error (alpha) is rejecting a true null hypothesis (false positive). Type II error (beta) is failing
to reject a false null (false negative).
9. Power of a study is defined as:
A. 1 - beta
B. 1 - alpha
C. alpha + beta
D. 1 - p-value
✓ Correct Answer: A
Rationale: Power = 1 - beta, where beta is the probability of Type II error. Power is the probability of
correctly rejecting a false null hypothesis.
STUVIA ACTUAL EXAM Page 2
, ACVPM | Practice Test - Questions & Answers Edition
10. Which measure is most appropriate for assessing the burden of disease in a population?
A. Prevalence
B. Incidence
C. Mortality rate
D. Case fatality rate
✓ Correct Answer: A
Rationale: Prevalence reflects the total burden of disease in a population at a given time. Incidence measures
new cases; mortality measures deaths; case fatality measures severity.
11. A study that follows a group of individuals forward in time to compare disease incidence among
exposed and unexposed is a:
A. Cohort
B. Case-control
C. Cross-sectional
D. Ecological
✓ Correct Answer: A
Rationale: Cohort studies follow individuals forward in time, comparing disease incidence between exposed
and unexposed groups. They are optimal for rare exposures.
12. The attributable risk represents:
A. Risk in exposed minus risk in unexposed
B. Risk in exposed divided by risk in unexposed
C. Total population risk
D. Risk ratio expressed as percent
✓ Correct Answer: A
Rationale: Attributable risk = risk in exposed - risk in unexposed. It measures the absolute excess risk
attributable to the exposure. Relative risk is the ratio of risks.
13. Which sampling method ensures every individual has an equal probability of selection?
A. Simple random
B. Convenience
C. Snowball
D. Purposive
✓ Correct Answer: A
Rationale: Simple random sampling gives each individual an equal probability of selection. Other methods
(convenience, snowball, purposive) introduce selection bias and limit generalizability.
14. A confounder must be:
A. Associated with the exposure only
B. Associated with the outcome only
C. Associated with both exposure and outcome but not on causal pathway
D. A random variable
✓ Correct Answer: C
Rationale: A confounder is associated with both exposure and outcome, is not on the causal pathway, and
distorts the observed association. Control methods include stratification, matching, and multivariable
modeling.
STUVIA ACTUAL EXAM Page 3
