©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM
BPH 206: FINAL EXAM Questions With
Correct Answers
What is disease transmission? - answer✔the passing of a communicable disease from one
infected individual or host to another
Examples:
-Acquiring rabies from a dog bite
-Catching influenza from a co-worker
-Transmitting syphilis to a sex partner
What is herd immunity? - answer✔Generalized resistance to a particular disease within the
population that arises because the majority of people have developed immunity to the condition
What is low herd immunity? - answer✔Immune members are more susceptible to disease
Immunity=60%
, ©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM
Susceptibility= 40%
What is high herd immunity? - answer✔Immune members are less susceptible to disease
Immunity= 85%
Susceptibility= 15%
What is the epi triad model? - answer✔A model that views three elements as responsible for
explaining disease patterns:
Host: a susceptible human or animal who can get the disease and nourishes an agent (one that is
infected)
Agent: entity that causes a disease (microorganism)
Environment: setting where the agent and the host interact
What is a complex epi triad? - answer✔You will have your agent that passes its disease to a
vector (ticks, fleas, mosquitoes). The vector then proceeds to infect a host and an alternate host.
What is a simple epi triad? - answer✔-Host on top of the triangle (e.g. susceptible human)
, ©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM
-Environment on the bottom right (e.g. wooded area in back yard)
-Agent on the lower left (e.g. borrelia burgorferi
What are the characteristics of the epi triad that influences how a disease is spread? - answer✔-
Host characteristics: age, immune status, genetic predisposition
-Agent of characteristics: infectivity, pathogenicity (capacity of a microbe to cause a disease) ,
virulence (degree of pathogenicity: severe or not as severe )
Environment: heat, moisture, proximity/interaction of organisms
What is the web of causation? - answer✔schematic of how factors work together to cause disease
(particularly used in chronic diseases/noninfectious diseases
Examples: host immunity, environmental factors, public health policies, access to healthcare,
genetic factors, travel, social networks, occupational exposures
What is endemic? - answer✔the "normal" expected presence of disease in a certain area
Ex: yellow fever in part of South America, malaria in parts of Africa, Common Cold in the USA
12/3/2024 11:27AM
BPH 206: FINAL EXAM Questions With
Correct Answers
What is disease transmission? - answer✔the passing of a communicable disease from one
infected individual or host to another
Examples:
-Acquiring rabies from a dog bite
-Catching influenza from a co-worker
-Transmitting syphilis to a sex partner
What is herd immunity? - answer✔Generalized resistance to a particular disease within the
population that arises because the majority of people have developed immunity to the condition
What is low herd immunity? - answer✔Immune members are more susceptible to disease
Immunity=60%
, ©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM
Susceptibility= 40%
What is high herd immunity? - answer✔Immune members are less susceptible to disease
Immunity= 85%
Susceptibility= 15%
What is the epi triad model? - answer✔A model that views three elements as responsible for
explaining disease patterns:
Host: a susceptible human or animal who can get the disease and nourishes an agent (one that is
infected)
Agent: entity that causes a disease (microorganism)
Environment: setting where the agent and the host interact
What is a complex epi triad? - answer✔You will have your agent that passes its disease to a
vector (ticks, fleas, mosquitoes). The vector then proceeds to infect a host and an alternate host.
What is a simple epi triad? - answer✔-Host on top of the triangle (e.g. susceptible human)
, ©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM
-Environment on the bottom right (e.g. wooded area in back yard)
-Agent on the lower left (e.g. borrelia burgorferi
What are the characteristics of the epi triad that influences how a disease is spread? - answer✔-
Host characteristics: age, immune status, genetic predisposition
-Agent of characteristics: infectivity, pathogenicity (capacity of a microbe to cause a disease) ,
virulence (degree of pathogenicity: severe or not as severe )
Environment: heat, moisture, proximity/interaction of organisms
What is the web of causation? - answer✔schematic of how factors work together to cause disease
(particularly used in chronic diseases/noninfectious diseases
Examples: host immunity, environmental factors, public health policies, access to healthcare,
genetic factors, travel, social networks, occupational exposures
What is endemic? - answer✔the "normal" expected presence of disease in a certain area
Ex: yellow fever in part of South America, malaria in parts of Africa, Common Cold in the USA
