MIC 205 EXAM 3 COMPLETE QUESTIONS
WITH VERIFIED ANSWERS
A 24 year old female patient reports to a clinic with diarrhea, fatigue, gas, weight
loss, and abdominal cramps. Upon speaking to the clinician, she mentions that
many other members of her gym mentioned suffering from similar symptoms.
This led to follow-up testing of other gym members and the local health
department to conduct a site visit when a possible outbreak was identified.
Testing yield that there was an outbreak and the most likely source was ceramic
bottle water dispenser and use within a critical 5 day period. The unlucky gym-
goers were infected with:
A. Leishmania donovani
B. Giardia lamblia
C. Mycobacterium leprae
D. Rabies virus - ANSWERS✔-B (Giardia lamblia)
\.What is the arrow showing in regards to the population of bacteria?
(picture with box around solid line going down)
A. Increasing arithmetically, a 90% increase from 1 to 2 min.
B. Decreasing arithmetically, a 10% decrease from 1 to 2 min
C. Decreasing logarithmically, a 90% decrease from 1 to 2 min
D. Increasing logarithmically, showing a-thousand-fold increase from 1 to 2 min -
ANSWERS✔-C (Decreasing logarithmically, a 90% decrease from 1 to 2 min)
,\.Which factor affecting the rate of microbial death does this figure present?
(picture with high and low population load)
A. Presence of organic matter influences rate of microbial death
B. If there are more microbes, it takes longer to kill the population
C. Longer heat treatment compensates for lower temperature
D. Microbial characteristics affect the rate of microbial death - ANSWERS✔-B (If
there are more microbes, it takes longer to kill the population)
\.A family just returned from an out of state vacation and the children were taken
to the pediatrician with a high fever, runny nose, and rash. They reported having
an enjoyable two week vacation, which had started with two days at a popular
theme park, popular with visitors from all over the world. The parents stated that
they did not believe in vaccination, thus their children were unvaccinated. they ,
themselves, were vaccinated. The children were most likely infected with:
A. Clonorchis sinensis
B. Toxoplasma gondii
C. Entamoeba histolytica
D. Measles virus - ANSWERS✔-D (Measles virus)
\.Which term describes how long it takes to reduce a bacterial population by one
log?
A. Thermal death point (TDP)
B. Thermal death time (TDT)
C. Decimal reduction time (DRT)
D. No answer is correct - ANSWERS✔-C (Decimal reduction time (DRT))
,\.Which method of controlling microbes damages by creating thymine dimers?
A. Low temperature
B. High pressure
C. Gamma rays
D. Ultraviolet radiation - ANSWERS✔-D (ultraviolet radiation)
\.Which of these is a factor that has an effect on how well a disinfectant works to
kill microbes?
A. Presence of blood, stool, urine and other organic materials
B. How much contact the disinfectant makes with the microbes
C. Temperature
D. All are correct - ANSWERS✔-D (all are correct)
\.What type of disinfectant is triclosan?
A. Biguanide
B. Bisphenol
C. Halogen
D. No answer is correct - ANSWERS✔-B (bisphenol)
\.For a 2 month period, a respiratory disease cluster was identified in South Korea.
The index patient of the infectious agent was found to be a businessman who had
returned from traveling to Saudi Arabia, Bahrain, and Qatar. He sought medical
assistance at 4 different facilities within a week of returning from his trip,
, reporting fever and cough as symptoms. The index case led to 186 human cases
and 36 deaths. The outbreak was surprising because it represented 3 generations
of human-to-human transmission of the microbe.
The infectious agent was:
A. Ascaris lumbricoides
B. Coccidioides immitis
C. Candida albicans
D. MERS virus - ANSWERS✔-D (MERS virus)
\.Which surface-active agent works by degerming?
A. Cationic agent
B. Acid-anionic agent
C. Quaternary ammonium compound
D. No answer is correct - ANSWERS✔-D (no answer is correct)
\.Which chemical treatment is considered the most effective?
A. Nitrate salts
B. Nisin
C. Aldehydes
D. Peroxygens - ANSWERS✔-C (aldehydes)
\.What characteristics allows antibiotics (for the most part) to kill bacteria, but not
our own cells?
A. The fact that bacteria have peptidoglycan and we do not
WITH VERIFIED ANSWERS
A 24 year old female patient reports to a clinic with diarrhea, fatigue, gas, weight
loss, and abdominal cramps. Upon speaking to the clinician, she mentions that
many other members of her gym mentioned suffering from similar symptoms.
This led to follow-up testing of other gym members and the local health
department to conduct a site visit when a possible outbreak was identified.
Testing yield that there was an outbreak and the most likely source was ceramic
bottle water dispenser and use within a critical 5 day period. The unlucky gym-
goers were infected with:
A. Leishmania donovani
B. Giardia lamblia
C. Mycobacterium leprae
D. Rabies virus - ANSWERS✔-B (Giardia lamblia)
\.What is the arrow showing in regards to the population of bacteria?
(picture with box around solid line going down)
A. Increasing arithmetically, a 90% increase from 1 to 2 min.
B. Decreasing arithmetically, a 10% decrease from 1 to 2 min
C. Decreasing logarithmically, a 90% decrease from 1 to 2 min
D. Increasing logarithmically, showing a-thousand-fold increase from 1 to 2 min -
ANSWERS✔-C (Decreasing logarithmically, a 90% decrease from 1 to 2 min)
,\.Which factor affecting the rate of microbial death does this figure present?
(picture with high and low population load)
A. Presence of organic matter influences rate of microbial death
B. If there are more microbes, it takes longer to kill the population
C. Longer heat treatment compensates for lower temperature
D. Microbial characteristics affect the rate of microbial death - ANSWERS✔-B (If
there are more microbes, it takes longer to kill the population)
\.A family just returned from an out of state vacation and the children were taken
to the pediatrician with a high fever, runny nose, and rash. They reported having
an enjoyable two week vacation, which had started with two days at a popular
theme park, popular with visitors from all over the world. The parents stated that
they did not believe in vaccination, thus their children were unvaccinated. they ,
themselves, were vaccinated. The children were most likely infected with:
A. Clonorchis sinensis
B. Toxoplasma gondii
C. Entamoeba histolytica
D. Measles virus - ANSWERS✔-D (Measles virus)
\.Which term describes how long it takes to reduce a bacterial population by one
log?
A. Thermal death point (TDP)
B. Thermal death time (TDT)
C. Decimal reduction time (DRT)
D. No answer is correct - ANSWERS✔-C (Decimal reduction time (DRT))
,\.Which method of controlling microbes damages by creating thymine dimers?
A. Low temperature
B. High pressure
C. Gamma rays
D. Ultraviolet radiation - ANSWERS✔-D (ultraviolet radiation)
\.Which of these is a factor that has an effect on how well a disinfectant works to
kill microbes?
A. Presence of blood, stool, urine and other organic materials
B. How much contact the disinfectant makes with the microbes
C. Temperature
D. All are correct - ANSWERS✔-D (all are correct)
\.What type of disinfectant is triclosan?
A. Biguanide
B. Bisphenol
C. Halogen
D. No answer is correct - ANSWERS✔-B (bisphenol)
\.For a 2 month period, a respiratory disease cluster was identified in South Korea.
The index patient of the infectious agent was found to be a businessman who had
returned from traveling to Saudi Arabia, Bahrain, and Qatar. He sought medical
assistance at 4 different facilities within a week of returning from his trip,
, reporting fever and cough as symptoms. The index case led to 186 human cases
and 36 deaths. The outbreak was surprising because it represented 3 generations
of human-to-human transmission of the microbe.
The infectious agent was:
A. Ascaris lumbricoides
B. Coccidioides immitis
C. Candida albicans
D. MERS virus - ANSWERS✔-D (MERS virus)
\.Which surface-active agent works by degerming?
A. Cationic agent
B. Acid-anionic agent
C. Quaternary ammonium compound
D. No answer is correct - ANSWERS✔-D (no answer is correct)
\.Which chemical treatment is considered the most effective?
A. Nitrate salts
B. Nisin
C. Aldehydes
D. Peroxygens - ANSWERS✔-C (aldehydes)
\.What characteristics allows antibiotics (for the most part) to kill bacteria, but not
our own cells?
A. The fact that bacteria have peptidoglycan and we do not
