MIC 205 EXAM 3 UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS
Question:
1. 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
Answer:
B (Giardia lamblia)
Question:
2. 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
Answer:
C (Decreasing logarithmically, a 90% decrease from 1 to 2 min)
Question:
3. 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
Answer:
B (If there are more microbes, it takes longer to kill the population)
,Question:
4. 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
Answer:
D (Measles virus)
Question:
5. 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
Answer:
C (Decimal reduction time (DRT))
Question:
6. Which method of controlling microbes damages by creating thymine dimers?
A. Low temperature
B. High pressure
C. Gamma rays
D. Ultraviolet radiation
Answer:
D (ultraviolet radiation)
Question:
7. 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
Answer:
D (all are correct)
Question:
8. What type of disinfectant is triclosan?
A. Biguanide
B. Bisphenol
C. Halogen
D. No answer is correct
, Answer:
B (bisphenol)
Question:
9. 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
Answer:
D (MERS virus)
Question:
10. Which surface-active agent works by degerming?
A. Cationic agent
B. Acid-anionic agent
C. Quaternary ammonium compound
D. No answer is correct
Answer:
D (no answer is correct)
Question:
11. Which chemical treatment is considered the most effective?
A. Nitrate salts
B. Nisin
C. Aldehydes
D. Peroxygens
Answer:
C (aldehydes)
Question:
12. 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
B. Differences in enzymes (biochemical pathways are slightly different)
C. Bacterial ribosomes are 70S
D. All are characteristics that allow antibiotics to kill bacterial cells
Answer:
D (All are characteristics that allow antibiotics to kill bacterial cells)
CORRECT ANSWERS
Question:
1. 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
Answer:
B (Giardia lamblia)
Question:
2. 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
Answer:
C (Decreasing logarithmically, a 90% decrease from 1 to 2 min)
Question:
3. 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
Answer:
B (If there are more microbes, it takes longer to kill the population)
,Question:
4. 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
Answer:
D (Measles virus)
Question:
5. 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
Answer:
C (Decimal reduction time (DRT))
Question:
6. Which method of controlling microbes damages by creating thymine dimers?
A. Low temperature
B. High pressure
C. Gamma rays
D. Ultraviolet radiation
Answer:
D (ultraviolet radiation)
Question:
7. 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
Answer:
D (all are correct)
Question:
8. What type of disinfectant is triclosan?
A. Biguanide
B. Bisphenol
C. Halogen
D. No answer is correct
, Answer:
B (bisphenol)
Question:
9. 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
Answer:
D (MERS virus)
Question:
10. Which surface-active agent works by degerming?
A. Cationic agent
B. Acid-anionic agent
C. Quaternary ammonium compound
D. No answer is correct
Answer:
D (no answer is correct)
Question:
11. Which chemical treatment is considered the most effective?
A. Nitrate salts
B. Nisin
C. Aldehydes
D. Peroxygens
Answer:
C (aldehydes)
Question:
12. 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
B. Differences in enzymes (biochemical pathways are slightly different)
C. Bacterial ribosomes are 70S
D. All are characteristics that allow antibiotics to kill bacterial cells
Answer:
D (All are characteristics that allow antibiotics to kill bacterial cells)
