WGU D028 AJM3 Advanced Health Assessments for Patients
and Populations Crab Apple Valley Communicable Outbreak
Scenario Presentation Passed with notes Western Governors
University
SECTION 1 — OUTBREAK FUNDAMENTALS AND CRAB APPLE VALLEY
1. What is the most appropriate definition of an outbreak?
A. Any single occurrence of a rare disease
B. More cases of a disease than expected in a defined population, place,
and time
C. Every infectious disease reported to a health department
D. A disease that affects more than one country
Answer: B
Rationale: An outbreak occurs when disease occurrence exceeds what
is normally expected for a defined population, location, and time
period. (CDC)
2. Which term best describes the Crab Apple Valley event when cases
greatly exceed the expected level within a defined community?
A. Sporadic infection
B. Endemic disease
C. Epidemic/outbreak
D. Eradication
Answer: C
Rationale: A substantial increase above expected disease occurrence
,within a defined population or geographic area constitutes an outbreak
or epidemic. (CDC)
3. Which pathogen is associated with the Crab Apple Valley scenario?
A. Yersinia pestis
B. Escherichia coli O157:H7
C. Influenza A
D. Clostridioides difficile
Answer: A
Rationale: Publicly posted summaries of the Crab Apple Valley scenario
identify the outbreak as plague caused by Yersinia pestis. (Studocu)
4. What type of organism causes plague?
A. Virus
B. Fungus
C. Bacterium
D. Protozoan
Answer: C
Rationale: Plague is caused by the bacterium Yersinia pestis. (CDC)
5. Which finding would most strongly support concern for plague in a
patient with compatible exposure?
A. Painless ankle swelling only
B. Painful swollen lymph node with fever
C. Chronic low back pain
D. Isolated sore throat
,Answer: B
Rationale: Bubonic plague commonly produces fever, chills, weakness,
and painful swollen lymph nodes called buboes. (CDC)
6. Why is recognizing an outbreak early important?
A. It eliminates the need for laboratory testing
B. It allows control measures to begin sooner
C. It guarantees every exposed person will become infected
D. It replaces the need for surveillance
Answer: B
Rationale: Early recognition can permit timely investigation, prevention,
treatment, and control actions.
7. Which situation could initially trigger public health investigation?
A. A single patient requesting a refill
B. Several patients presenting with a similar unusual illness pattern
C. A routine annual physical
D. A patient with stable hypertension
Answer: B
Rationale: An unusual cluster of similar illnesses can signal a possible
outbreak and warrant investigation. (CDC)
8. What is a major purpose of an outbreak investigation?
A. Identify causes and risk factors and implement control measures
B. Increase hospital admissions
C. Eliminate all laboratory testing
D. Determine individual insurance coverage
, Answer: A
Rationale: Field epidemiology transforms collected information into
actions that protect public health. (CDC)
9. Which discipline provides the primary framework for describing
disease by person, place, and time?
A. Epidemiology
B. Pathology
C. Pharmacology
D. Anatomy
Answer: A
Rationale: Descriptive epidemiology organizes outbreaks according to
person, place, and time.
10. Which finding would be least useful for initially recognizing a
communicable outbreak?
A. Several patients develop similar symptoms within a short period
B. A cluster occurs in a defined geographic area
C. A single unrelated chronic disease diagnosis
D. Laboratory results suggest a shared infectious cause
Answer: C
Rationale: A single unrelated chronic disease does not by itself suggest
an infectious outbreak.
11. What does “at-risk population” mean?
A. Every person in the world
B. The population capable of experiencing the outcome being
investigated
and Populations Crab Apple Valley Communicable Outbreak
Scenario Presentation Passed with notes Western Governors
University
SECTION 1 — OUTBREAK FUNDAMENTALS AND CRAB APPLE VALLEY
1. What is the most appropriate definition of an outbreak?
A. Any single occurrence of a rare disease
B. More cases of a disease than expected in a defined population, place,
and time
C. Every infectious disease reported to a health department
D. A disease that affects more than one country
Answer: B
Rationale: An outbreak occurs when disease occurrence exceeds what
is normally expected for a defined population, location, and time
period. (CDC)
2. Which term best describes the Crab Apple Valley event when cases
greatly exceed the expected level within a defined community?
A. Sporadic infection
B. Endemic disease
C. Epidemic/outbreak
D. Eradication
Answer: C
Rationale: A substantial increase above expected disease occurrence
,within a defined population or geographic area constitutes an outbreak
or epidemic. (CDC)
3. Which pathogen is associated with the Crab Apple Valley scenario?
A. Yersinia pestis
B. Escherichia coli O157:H7
C. Influenza A
D. Clostridioides difficile
Answer: A
Rationale: Publicly posted summaries of the Crab Apple Valley scenario
identify the outbreak as plague caused by Yersinia pestis. (Studocu)
4. What type of organism causes plague?
A. Virus
B. Fungus
C. Bacterium
D. Protozoan
Answer: C
Rationale: Plague is caused by the bacterium Yersinia pestis. (CDC)
5. Which finding would most strongly support concern for plague in a
patient with compatible exposure?
A. Painless ankle swelling only
B. Painful swollen lymph node with fever
C. Chronic low back pain
D. Isolated sore throat
,Answer: B
Rationale: Bubonic plague commonly produces fever, chills, weakness,
and painful swollen lymph nodes called buboes. (CDC)
6. Why is recognizing an outbreak early important?
A. It eliminates the need for laboratory testing
B. It allows control measures to begin sooner
C. It guarantees every exposed person will become infected
D. It replaces the need for surveillance
Answer: B
Rationale: Early recognition can permit timely investigation, prevention,
treatment, and control actions.
7. Which situation could initially trigger public health investigation?
A. A single patient requesting a refill
B. Several patients presenting with a similar unusual illness pattern
C. A routine annual physical
D. A patient with stable hypertension
Answer: B
Rationale: An unusual cluster of similar illnesses can signal a possible
outbreak and warrant investigation. (CDC)
8. What is a major purpose of an outbreak investigation?
A. Identify causes and risk factors and implement control measures
B. Increase hospital admissions
C. Eliminate all laboratory testing
D. Determine individual insurance coverage
, Answer: A
Rationale: Field epidemiology transforms collected information into
actions that protect public health. (CDC)
9. Which discipline provides the primary framework for describing
disease by person, place, and time?
A. Epidemiology
B. Pathology
C. Pharmacology
D. Anatomy
Answer: A
Rationale: Descriptive epidemiology organizes outbreaks according to
person, place, and time.
10. Which finding would be least useful for initially recognizing a
communicable outbreak?
A. Several patients develop similar symptoms within a short period
B. A cluster occurs in a defined geographic area
C. A single unrelated chronic disease diagnosis
D. Laboratory results suggest a shared infectious cause
Answer: C
Rationale: A single unrelated chronic disease does not by itself suggest
an infectious outbreak.
11. What does “at-risk population” mean?
A. Every person in the world
B. The population capable of experiencing the outcome being
investigated
