VBS 2032 Exam 3 Questions with
complete solution
microbial intoxication - correct answer ✔when a heat resistant toxin is
ingested, usually in food, rather than spread
microbial infection - correct answer ✔when the toxin gets in the body through
the first line of defense and the organisms causes disease
vertical transmission - correct answer ✔passed from mother to baby
horizontal transmission - correct answer ✔passed from person to person
endemic - correct answer ✔constantly present in a population
incidence - correct answer ✔number of new cases in a given time in a given
population
What types of virulence factors help a pathogen through the body, evade the
host immune defenses or cause damage to the host? - correct answer
✔attachment, multiplication, invasion or spread, evasion of host defenses,
damage to host tissues
If you stay home only during the symptomatic phase of illness, will you avoid
infecting other people? - correct answer ✔you can still infect others even
when you don't feel sick because you are infectious during the incubation,
prodromal, period of illness, convalescent period, and even after recovered
from disease
, What is the difference between an asymptomatic carrier and a person with a
latent infection? - correct answer ✔an asymptomatic carrier is still spreading
the pathogen to others and a person with a latent infection still has the
pathogen in the body, but the pathogen is not actively replicating and cannot
be spread to others
What is a fomite? - correct answer ✔something that is not alive but can
harbor an organism
What types of microorganisms are transmitted directly? - correct answer ✔
What is the difference between a microbial intoxication and a microbial
infection? - correct answer ✔microbial intoxication is getting sick from the
toxin and microbial infection is getting sick from the organism
What are some examples of when Koch's postulates could not be satisfied? -
correct answer ✔when the organism cannot be cultured, when there is no
animal host, when the infraction is caused by more than one organisms, when
a healthy person carries the organism
How did Zimbler et al. determine that a mutated form of pla increased the
virulence of Y. pestis? - correct answer ✔they used the DNA sequencing to
see the effects of different forms and how virulent they were; they injected the
different strains and genes in mice and determined what resulted in the mice
What virulence factor allows the pathogen to live inside of fleas? How does
this influence the transmission of the bacterium? - correct answer ✔
What is the difference between direct and indirect transmission? What are
some examples of each? - correct answer ✔direct is less than 1 meter away,
complete solution
microbial intoxication - correct answer ✔when a heat resistant toxin is
ingested, usually in food, rather than spread
microbial infection - correct answer ✔when the toxin gets in the body through
the first line of defense and the organisms causes disease
vertical transmission - correct answer ✔passed from mother to baby
horizontal transmission - correct answer ✔passed from person to person
endemic - correct answer ✔constantly present in a population
incidence - correct answer ✔number of new cases in a given time in a given
population
What types of virulence factors help a pathogen through the body, evade the
host immune defenses or cause damage to the host? - correct answer
✔attachment, multiplication, invasion or spread, evasion of host defenses,
damage to host tissues
If you stay home only during the symptomatic phase of illness, will you avoid
infecting other people? - correct answer ✔you can still infect others even
when you don't feel sick because you are infectious during the incubation,
prodromal, period of illness, convalescent period, and even after recovered
from disease
, What is the difference between an asymptomatic carrier and a person with a
latent infection? - correct answer ✔an asymptomatic carrier is still spreading
the pathogen to others and a person with a latent infection still has the
pathogen in the body, but the pathogen is not actively replicating and cannot
be spread to others
What is a fomite? - correct answer ✔something that is not alive but can
harbor an organism
What types of microorganisms are transmitted directly? - correct answer ✔
What is the difference between a microbial intoxication and a microbial
infection? - correct answer ✔microbial intoxication is getting sick from the
toxin and microbial infection is getting sick from the organism
What are some examples of when Koch's postulates could not be satisfied? -
correct answer ✔when the organism cannot be cultured, when there is no
animal host, when the infraction is caused by more than one organisms, when
a healthy person carries the organism
How did Zimbler et al. determine that a mutated form of pla increased the
virulence of Y. pestis? - correct answer ✔they used the DNA sequencing to
see the effects of different forms and how virulent they were; they injected the
different strains and genes in mice and determined what resulted in the mice
What virulence factor allows the pathogen to live inside of fleas? How does
this influence the transmission of the bacterium? - correct answer ✔
What is the difference between direct and indirect transmission? What are
some examples of each? - correct answer ✔direct is less than 1 meter away,
