7/21/25, 8:37
AM
MBI 111 EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED LATEST
RELEASE 100% GUARANTEED PASS
Terms in this set (143)
People with no signs or symptoms of a clinical
carrier disease, but the pathogens are
inconspicuously harbored and shed to
others. Can be chronic (long term
shedding) or passive (contaminated
hands or clothing)
epidemiology the study of when and where diseases
occur and how they are transmitted in
populations; emphasis on disease
prevention and control
Center for Disease CDC; studies epidemiology in America
Control
diseases that occur primarily in wild or domestic
zoonoses animals or birds that can be
transmitted to humans (ex. rabies from
mammals, West Nile Virus from wild birds,
tapeworms from cattle or fish)
1/
16
,7/21/25, 8:37
AM
natural host or habitat of a pathogenic microbe,
reservoir place(s) where the pathogen
normally lives and multiplies (ex. humans,
animals, or non-living substances like a
desk)
Chain of Transmission pathogen in reservoir (portal of exit for
Model living reservoirs) -> mode of transmission
(portal of entry) -> new susceptible
host
human reservoir people with clinically recognized disease,
meaning signs and symptoms of disease
are present
symptoms felt by affected person (ex. chills, pain, aches,
fatigue, itching, etc.)
signs observed by a healthcare provider (ex.
fever, chest sounds, skin eruptions, white
blood cell count, heart rate, etc.)
nonliving reservoirs contaminated food, water and/or soil
transmission movement of a pathogenic microbe from its
reservoir to a new potential host
direct contact microbes spread by direct physical
transmission contact between source and host with no
intermediate objects involved
transmission by microbes are carried in mucus droplets
from sneezing or coughing that travel
2/
16
, 7/21/25, 8:37
AM
droplets less than 1 meter
trans-placental microbes from a pregnant woman's
(vertical) transmission bloodstream cross the placenta and enter
the bloodstream of the fetus (ex. Zika,
syphilis)
transmission by vectors vector-borne diseases
vector a non-human, living organism capable of
transmitting an infectious disease
mechanical vector passively carry pathogens on their bodies (they
are not infected)
biological vector an arthropod in which the disease-
causing organism multiplies or develops
within the arthropod prior to becoming
infective for a susceptible individual
transmission by vehicle transmission by water, food, air or fomite
vehicle a non-living material capable of
transmitting an infectious disease (ex.
water, food, air, or fomite)
fomite any other contaminated inanimate object
(ex. bedding, toys, cell phones, medical
equipment, etc.)
prevention and Why do infectious disease epidemiologists use
control of the chain of transmission model?
infectious diseases
involves breaking
3/
16
AM
MBI 111 EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED LATEST
RELEASE 100% GUARANTEED PASS
Terms in this set (143)
People with no signs or symptoms of a clinical
carrier disease, but the pathogens are
inconspicuously harbored and shed to
others. Can be chronic (long term
shedding) or passive (contaminated
hands or clothing)
epidemiology the study of when and where diseases
occur and how they are transmitted in
populations; emphasis on disease
prevention and control
Center for Disease CDC; studies epidemiology in America
Control
diseases that occur primarily in wild or domestic
zoonoses animals or birds that can be
transmitted to humans (ex. rabies from
mammals, West Nile Virus from wild birds,
tapeworms from cattle or fish)
1/
16
,7/21/25, 8:37
AM
natural host or habitat of a pathogenic microbe,
reservoir place(s) where the pathogen
normally lives and multiplies (ex. humans,
animals, or non-living substances like a
desk)
Chain of Transmission pathogen in reservoir (portal of exit for
Model living reservoirs) -> mode of transmission
(portal of entry) -> new susceptible
host
human reservoir people with clinically recognized disease,
meaning signs and symptoms of disease
are present
symptoms felt by affected person (ex. chills, pain, aches,
fatigue, itching, etc.)
signs observed by a healthcare provider (ex.
fever, chest sounds, skin eruptions, white
blood cell count, heart rate, etc.)
nonliving reservoirs contaminated food, water and/or soil
transmission movement of a pathogenic microbe from its
reservoir to a new potential host
direct contact microbes spread by direct physical
transmission contact between source and host with no
intermediate objects involved
transmission by microbes are carried in mucus droplets
from sneezing or coughing that travel
2/
16
, 7/21/25, 8:37
AM
droplets less than 1 meter
trans-placental microbes from a pregnant woman's
(vertical) transmission bloodstream cross the placenta and enter
the bloodstream of the fetus (ex. Zika,
syphilis)
transmission by vectors vector-borne diseases
vector a non-human, living organism capable of
transmitting an infectious disease
mechanical vector passively carry pathogens on their bodies (they
are not infected)
biological vector an arthropod in which the disease-
causing organism multiplies or develops
within the arthropod prior to becoming
infective for a susceptible individual
transmission by vehicle transmission by water, food, air or fomite
vehicle a non-living material capable of
transmitting an infectious disease (ex.
water, food, air, or fomite)
fomite any other contaminated inanimate object
(ex. bedding, toys, cell phones, medical
equipment, etc.)
prevention and Why do infectious disease epidemiologists use
control of the chain of transmission model?
infectious diseases
involves breaking
3/
16
