D311: Microbiology WGU OA COMPLETE EXAM
QUESTIONS AND ACCURATE ANSWERS (2027)
|ALREADY PASSED!!
Why are the relationships between pathogenic microbes and their hosts considered
parasitic? - ANSWER -The microbe benefits from the interaction while the host is
harmed.
Which characteristic of dracunculiasis has been pivotal to the success of its
eradication campaign? - ANSWER -Dracunculiasis has no animal reservoir.
Which type of organism would be most likely to grow on food stored in a
refrigerator or freezer? - ANSWER -A psychrophile would be most likely to grow
on food stored in a refrigerator or freezer as these microorganisms thrive in cold
temperatures.
Staphylococcus epidermldls is a member of the human resident microbiota and
considered part of the human innate immune system. S. epldermidis uses our dead
skin cells as a source of nutrients. What type of relationship between S.
epidermidis and humans is described above? - ANSWER -The type of relationship
between Staphylococcus epidermidis and humans described above is
"Commensalism," where one organism (S. epidermidis) benefits (uses dead skin
cells) without harming the other organism (humans).
Commensalism
Why is the production of lactic acid by the resident microbe Lactobacillus
Important to human health? - ANSWER -Lactic acid is important to human health
because it inhibits the growth of pathogenic yeasts.
Which type of infections are prevented by proper sterilization of hospital
equipment and healthcare worker handwashing? - ANSWER -Nosocomial
infections are prevented by proper sterilization of hospital equipment and
healthcare worker handwashing.
, A patient Is determined to have contracted Lyme disease after being bit by an
infected tick. What type of transmission is described in this scenario? - ANSWER
-Vector transmission is described in this scenario.
Which is a description of vehicle transmission? - ANSWER -A person drinks
untreated water on vacation and later has diarrhea and nausea is a description of
vehicle transmission.
Which organism type contains species that perform adhesion through the unique
use of its flagella to move out fluid from under a large adhesive disc, resulting in
lower pressure to adhere to the intestinal lining? - ANSWER -Protozoa
A patient presents to the emergency department with high fever. difficulty
breathing. vomiting, coughing up blood. and severe chest pain when inhaling.
Which pathogen would the provider suspect? - ANSWER -Bacillus anthracis
Which activity of the complement system would be useful against an infection
caused by a gram-negative bacterium? - ANSWER -Membrane attack complex
Which body system is protected by the ciliary escalator? - ANSWER -Respiratory
What is the role of global public health organizations in eradication of diseases,
like polio? - ANSWER -Organize vaccination campaigns and programs
Malaria cases are routinely found in certain areas of the world but are not seen In
other areas. How would malaria be described in those areas where it is found? -
ANSWER -Endemic
A hospital notices an increase in patients being admitted with gastrointestinal
symptoms and dehydration over a two-week period. An epidemiological analysis
reveals that the cause is the same pathogen, but that none of the hospitalized
individuals were ever in the same location at the same time. What is an explanation
for this analysis? - ANSWER -These individuals all consumed contaminated food
from a common manufacturing source.
QUESTIONS AND ACCURATE ANSWERS (2027)
|ALREADY PASSED!!
Why are the relationships between pathogenic microbes and their hosts considered
parasitic? - ANSWER -The microbe benefits from the interaction while the host is
harmed.
Which characteristic of dracunculiasis has been pivotal to the success of its
eradication campaign? - ANSWER -Dracunculiasis has no animal reservoir.
Which type of organism would be most likely to grow on food stored in a
refrigerator or freezer? - ANSWER -A psychrophile would be most likely to grow
on food stored in a refrigerator or freezer as these microorganisms thrive in cold
temperatures.
Staphylococcus epidermldls is a member of the human resident microbiota and
considered part of the human innate immune system. S. epldermidis uses our dead
skin cells as a source of nutrients. What type of relationship between S.
epidermidis and humans is described above? - ANSWER -The type of relationship
between Staphylococcus epidermidis and humans described above is
"Commensalism," where one organism (S. epidermidis) benefits (uses dead skin
cells) without harming the other organism (humans).
Commensalism
Why is the production of lactic acid by the resident microbe Lactobacillus
Important to human health? - ANSWER -Lactic acid is important to human health
because it inhibits the growth of pathogenic yeasts.
Which type of infections are prevented by proper sterilization of hospital
equipment and healthcare worker handwashing? - ANSWER -Nosocomial
infections are prevented by proper sterilization of hospital equipment and
healthcare worker handwashing.
, A patient Is determined to have contracted Lyme disease after being bit by an
infected tick. What type of transmission is described in this scenario? - ANSWER
-Vector transmission is described in this scenario.
Which is a description of vehicle transmission? - ANSWER -A person drinks
untreated water on vacation and later has diarrhea and nausea is a description of
vehicle transmission.
Which organism type contains species that perform adhesion through the unique
use of its flagella to move out fluid from under a large adhesive disc, resulting in
lower pressure to adhere to the intestinal lining? - ANSWER -Protozoa
A patient presents to the emergency department with high fever. difficulty
breathing. vomiting, coughing up blood. and severe chest pain when inhaling.
Which pathogen would the provider suspect? - ANSWER -Bacillus anthracis
Which activity of the complement system would be useful against an infection
caused by a gram-negative bacterium? - ANSWER -Membrane attack complex
Which body system is protected by the ciliary escalator? - ANSWER -Respiratory
What is the role of global public health organizations in eradication of diseases,
like polio? - ANSWER -Organize vaccination campaigns and programs
Malaria cases are routinely found in certain areas of the world but are not seen In
other areas. How would malaria be described in those areas where it is found? -
ANSWER -Endemic
A hospital notices an increase in patients being admitted with gastrointestinal
symptoms and dehydration over a two-week period. An epidemiological analysis
reveals that the cause is the same pathogen, but that none of the hospitalized
individuals were ever in the same location at the same time. What is an explanation
for this analysis? - ANSWER -These individuals all consumed contaminated food
from a common manufacturing source.
