MIC 205 EXAM 3 | QUESTIONS AND ANSWERS | WITH
COMPLETE SOLUTION!!
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)
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)
,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)
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)
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))
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)
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)
What type of disinfectant is triclosan?
A. Biguanide
B. Bisphenol
C. Halogen
D. No answer is correct Answer - 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 Answer - 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 Answer - D (no answer is correct)
Which chemical treatment is considered the most effective?
A. Nitrate salts
B. Nisin
C. Aldehydes
D. Peroxygens Answer - 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
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)
It is important that any antimicrobial treatment not excessively damage the
normal microbiota. There are consequences that may occur due to normal
microbiota being changed in a manner that does not help the patient being
treated. Which of the following is a way in which the microbiota could be
adversely (negatively) affected?
A. Superinfection may occur
COMPLETE SOLUTION!!
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)
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)
,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)
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)
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))
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)
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)
What type of disinfectant is triclosan?
A. Biguanide
B. Bisphenol
C. Halogen
D. No answer is correct Answer - 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 Answer - 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 Answer - D (no answer is correct)
Which chemical treatment is considered the most effective?
A. Nitrate salts
B. Nisin
C. Aldehydes
D. Peroxygens Answer - 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
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)
It is important that any antimicrobial treatment not excessively damage the
normal microbiota. There are consequences that may occur due to normal
microbiota being changed in a manner that does not help the patient being
treated. Which of the following is a way in which the microbiota could be
adversely (negatively) affected?
A. Superinfection may occur
