NUR428: Ch.12 & 14 Epidemiology and
Environmental Health Final Exam Study
Guide 2026/2027
⭐ Accurate Questions with Correct Detailed Solutions |
Newest Updated Version | High Pass Success
Prepare with confidence using this comprehensive Final Exam Study Guide 2026/2027,
designed to help students review important concepts, strengthen understanding, and improve
overall exam performance.
This resource includes accurate exam-style questions with correct detailed solutions,
carefully structured to reflect commonly tested topics and current exam standards. Each solution
is clearly explained to help students understand the reasoning behind every answer, reinforce
learning, and improve problem-solving skills.
Whether you are preparing weeks in advance or doing last-minute revision, this guide provides a
simple, organized, and exam-focused approach to studying smarter and achieving better
results.
🔥 Key Highlights
✔ Accurate exam questions covering essential topics
✔ Correct detailed solutions with clear explanations
✔ Focused review of commonly tested concepts
✔ Newest updated version (2026/2027)
✔ Easy-to-follow format for quick and effective revision
🚀 Why This Study Guide Is Effective
• Helps strengthen understanding of key concepts
• Supports fast and efficient revision
• Improves confidence before exams
,• Enhances problem-solving and test-taking skills
• Provides realistic exam-style practice
🎯 Ideal For
• Final exam preparation
• Midterm and course revision
• Practicing exam-style questions
• Last-minute study sessions
• Improving overall academic performance
📚 A trusted and practical study resource designed to help students prepare effectively,
build confidence, and achieve exam success.
what is epidemiology?
the scientific study of the distribution and determinants of disease & health outcomes
within specific populations
what is the goal of epidemiology?
to develop methods of controlling health problems, limit the consequences of illnesses,
& maximize health
why is epidemiology important in public health nursing?
provides an evidence-based foundation for identifying causes and risk factors so that
nurses can intervene early to reduce the risk of morbidity and mortality from a disease
what did Edward Jenner contribute to epidemiology?
created the smallpox vaccine which led to the eradication of smallpox
what was Ignaz Semmelweis and what did he contribute to epidemiology?
obstetric physician who identified that mandatory handwashing with chlorinated lime
significantly reduced puerperal (childbed) fever mortality
who was John Snow and what did he contribute to epidemiology?
the "father of field epidemiology" who found the source of the 1854 London cholera
outbreak from a contaminated water pump
why was the importance of John Snow's discovery?
his data-driven investigation established the link between host, agent, and environment
to guide public health action
who was Florence Nightingale and what was her contribution to epidemiology?
the "founder of professional nursing" and considered the "first nurse epidemiologist"
who linked disease to poor sanitation and used data to improve health outcomes
what is the epidemiological triad?
model that shows how disease is caused by the interaction between a host, agent, and
environment
,what is the importance of the epidemiological triad?
it reflects the idea that health is not the result of one factor, but rather the interaction of
the three elements
what is a host in the epidemiological triad?
the person or population at risk for disease
what are the factors of a host in the epidemiological triad?
prior history of infection immunization, modifiable risk factors, and non-modifiable risk
factors
what are the modifiable risk factors of a host in the epidemiological triad?
lifestyle, nutrition, & exercise level
what are the non-modifiable risk factors of a host in the epidemiological triad?
age, race, & genetics
what is an agent in the epidemiological triad?
the cause of the health issue
what are the 5 categories of an agent in the epidemiological triad?
physical, chemical, nutritional, psychosocial, and biologic
what does pathogenicity mean?
the ability of an agent to cause disease
what is the environment in the epidemiological triad?
where the host and agent interact
what are the 3 types of environments in the epidemiological triad?
physical and social in nature, vectors, and reservoirs
what are some examples of a physical and social environment of the
epidemiological triad?
neighborhoods, housing, temperature, altitude, presence of crowding, air pollution,
radiation, water quality, and noise
what is a vector in the epidemiological triad?
an organism that carries disease
what are 2 examples of a vector?
mosquitos and ticks
what is a reservoir in the epidemiological triad?
where infectious agents normally live
what is the chain of infection?
an epidemiological model illustrating how infectious diseases spread from a source to a
new host
what are the 6 links in the chain of infection in order?
agent, reservoir, portal of exit, mode of transmission, portal of entry, susceptible host
what is a portal of exit in the chain of infection?
how the agent leaves its home
what are some examples of a portal of exit?
coughing, sneezing, bodily secretions, feces
what are some examples of modes of transmission in the chain of infection?
direct contact, indirect contact, vectors
what is a portal of entry in the chain of infection?
how/where the pathogen enters a host
what are some examples of a portal of entry in the chain of infection?
, mouth, nose, eyes, cuts in skin
what is the web of causation?
epidemiological model that illustrates how disease results from multiple complex factors
rather than one single cause.
what is morbidity?
presence of disease/illness in a population
what is mortality?
presence of death in a population
what is incidence?
the number of new cases/events in a population over a period
what does incidence rate measure/assess?
the risk of contracting a disease and tracks changes in progression
how do you calculate incidence rate?
(# of new cases / total population at risk) x 100
what is prevalence?
number of total existing cases (new and old) in a population over a period
what does prevalence rate measure/assess?
total accumulation of a disease to see how widespread it is
how do you calculate prevalence rate?
(# total cases / # total of people in population) x 100
what is environmental health?
freedom from injury due to toxic agents and hazardous environmental conditions
what is the goal of environmental health?
to prevent illness, disease, and death by reducing exposure to harmful environmental
conditions & promote behavior change
what is environmental justice?
the fair and equitable treatment and meaningful engagement of all regardless of race,
color, nationality, or SDOH in the development, execution, and enforcement of
environmental laws and policies
what populations are most affected by environmental injustice?
those living in poverty & the disenfranchised/marginalized
what environmental risks are common in disadvantaged communities?
unsafe housing, increased environmental hazards, limited access to healthcare
what does ALICE families stand for?
asset limited, income constrained, employed
what are ALICE families?
individuals and families who earn above the federal poverty level but still cannot afford
basic necessities like housing, food, and healthcare
how do nurses advocate for environmental health?
by reporting hazards, educating patients on ways to reduce exposure to harm/hazards,
advocating for policy change, and working with agencies
what agencies can nurses work with to support environmental health?
CDC and OSHA
what is the nurse’s role in environmental health?
identify risks, prevent exposure, and promote health and safety
what is the purpose of environmental health assessments?
Environmental Health Final Exam Study
Guide 2026/2027
⭐ Accurate Questions with Correct Detailed Solutions |
Newest Updated Version | High Pass Success
Prepare with confidence using this comprehensive Final Exam Study Guide 2026/2027,
designed to help students review important concepts, strengthen understanding, and improve
overall exam performance.
This resource includes accurate exam-style questions with correct detailed solutions,
carefully structured to reflect commonly tested topics and current exam standards. Each solution
is clearly explained to help students understand the reasoning behind every answer, reinforce
learning, and improve problem-solving skills.
Whether you are preparing weeks in advance or doing last-minute revision, this guide provides a
simple, organized, and exam-focused approach to studying smarter and achieving better
results.
🔥 Key Highlights
✔ Accurate exam questions covering essential topics
✔ Correct detailed solutions with clear explanations
✔ Focused review of commonly tested concepts
✔ Newest updated version (2026/2027)
✔ Easy-to-follow format for quick and effective revision
🚀 Why This Study Guide Is Effective
• Helps strengthen understanding of key concepts
• Supports fast and efficient revision
• Improves confidence before exams
,• Enhances problem-solving and test-taking skills
• Provides realistic exam-style practice
🎯 Ideal For
• Final exam preparation
• Midterm and course revision
• Practicing exam-style questions
• Last-minute study sessions
• Improving overall academic performance
📚 A trusted and practical study resource designed to help students prepare effectively,
build confidence, and achieve exam success.
what is epidemiology?
the scientific study of the distribution and determinants of disease & health outcomes
within specific populations
what is the goal of epidemiology?
to develop methods of controlling health problems, limit the consequences of illnesses,
& maximize health
why is epidemiology important in public health nursing?
provides an evidence-based foundation for identifying causes and risk factors so that
nurses can intervene early to reduce the risk of morbidity and mortality from a disease
what did Edward Jenner contribute to epidemiology?
created the smallpox vaccine which led to the eradication of smallpox
what was Ignaz Semmelweis and what did he contribute to epidemiology?
obstetric physician who identified that mandatory handwashing with chlorinated lime
significantly reduced puerperal (childbed) fever mortality
who was John Snow and what did he contribute to epidemiology?
the "father of field epidemiology" who found the source of the 1854 London cholera
outbreak from a contaminated water pump
why was the importance of John Snow's discovery?
his data-driven investigation established the link between host, agent, and environment
to guide public health action
who was Florence Nightingale and what was her contribution to epidemiology?
the "founder of professional nursing" and considered the "first nurse epidemiologist"
who linked disease to poor sanitation and used data to improve health outcomes
what is the epidemiological triad?
model that shows how disease is caused by the interaction between a host, agent, and
environment
,what is the importance of the epidemiological triad?
it reflects the idea that health is not the result of one factor, but rather the interaction of
the three elements
what is a host in the epidemiological triad?
the person or population at risk for disease
what are the factors of a host in the epidemiological triad?
prior history of infection immunization, modifiable risk factors, and non-modifiable risk
factors
what are the modifiable risk factors of a host in the epidemiological triad?
lifestyle, nutrition, & exercise level
what are the non-modifiable risk factors of a host in the epidemiological triad?
age, race, & genetics
what is an agent in the epidemiological triad?
the cause of the health issue
what are the 5 categories of an agent in the epidemiological triad?
physical, chemical, nutritional, psychosocial, and biologic
what does pathogenicity mean?
the ability of an agent to cause disease
what is the environment in the epidemiological triad?
where the host and agent interact
what are the 3 types of environments in the epidemiological triad?
physical and social in nature, vectors, and reservoirs
what are some examples of a physical and social environment of the
epidemiological triad?
neighborhoods, housing, temperature, altitude, presence of crowding, air pollution,
radiation, water quality, and noise
what is a vector in the epidemiological triad?
an organism that carries disease
what are 2 examples of a vector?
mosquitos and ticks
what is a reservoir in the epidemiological triad?
where infectious agents normally live
what is the chain of infection?
an epidemiological model illustrating how infectious diseases spread from a source to a
new host
what are the 6 links in the chain of infection in order?
agent, reservoir, portal of exit, mode of transmission, portal of entry, susceptible host
what is a portal of exit in the chain of infection?
how the agent leaves its home
what are some examples of a portal of exit?
coughing, sneezing, bodily secretions, feces
what are some examples of modes of transmission in the chain of infection?
direct contact, indirect contact, vectors
what is a portal of entry in the chain of infection?
how/where the pathogen enters a host
what are some examples of a portal of entry in the chain of infection?
, mouth, nose, eyes, cuts in skin
what is the web of causation?
epidemiological model that illustrates how disease results from multiple complex factors
rather than one single cause.
what is morbidity?
presence of disease/illness in a population
what is mortality?
presence of death in a population
what is incidence?
the number of new cases/events in a population over a period
what does incidence rate measure/assess?
the risk of contracting a disease and tracks changes in progression
how do you calculate incidence rate?
(# of new cases / total population at risk) x 100
what is prevalence?
number of total existing cases (new and old) in a population over a period
what does prevalence rate measure/assess?
total accumulation of a disease to see how widespread it is
how do you calculate prevalence rate?
(# total cases / # total of people in population) x 100
what is environmental health?
freedom from injury due to toxic agents and hazardous environmental conditions
what is the goal of environmental health?
to prevent illness, disease, and death by reducing exposure to harmful environmental
conditions & promote behavior change
what is environmental justice?
the fair and equitable treatment and meaningful engagement of all regardless of race,
color, nationality, or SDOH in the development, execution, and enforcement of
environmental laws and policies
what populations are most affected by environmental injustice?
those living in poverty & the disenfranchised/marginalized
what environmental risks are common in disadvantaged communities?
unsafe housing, increased environmental hazards, limited access to healthcare
what does ALICE families stand for?
asset limited, income constrained, employed
what are ALICE families?
individuals and families who earn above the federal poverty level but still cannot afford
basic necessities like housing, food, and healthcare
how do nurses advocate for environmental health?
by reporting hazards, educating patients on ways to reduce exposure to harm/hazards,
advocating for policy change, and working with agencies
what agencies can nurses work with to support environmental health?
CDC and OSHA
what is the nurse’s role in environmental health?
identify risks, prevent exposure, and promote health and safety
what is the purpose of environmental health assessments?
