©PREP4EXAMS @2024 [REAL EXAM DUMPS] Wednesday, July 17, 2024 1:27 AM
MLT Microbiology Quiz Exam Practice
Questions and Answers (100% Pass)
Proper media for culture of a urethral discharge from a man include:
A) chocolate and modified Thayer-Martin agars
B) Sheep blood and phenylethyl alcohol agars
C) Eosin-methylene blue and sheep agars
D) Thioglycollate broth and chocolate agar - ✔️✔️A) chocolate and modified Thayer-Martin
agars
A sheep blood agar inoculated with 0.001 mL of urine grow 70 colonies of staphylococcus
aureus. How many colonies forming units per mL of urine should be reported?
A) 70
B) 70,000
C) 700
D) 7,000 - ✔️✔️B) 70,000
Which selective medium is used for the isolation of gram-positive microorganisms?
a Columbia CNA with 5% sheep blood
b trypticase soy agar with 5% sheep blood
c eosin methylene blue
d modified Thayer-Martin - ✔️✔️a Columbia CNA with 5% sheep agar
Which of the following specimen requests is acceptable?
A rectal swab submitted for direct smear for gonococci
B feces submitted for a aerobic culture
C Foley catheter tip submitted for aerobic culture
D urine for culture of acid fast bacilli - ✔️✔️D) urine for culture of acid fast bacilli
Which of the following groups of specimens would be acceptance for anaerobic culture
A vaginal, eye
B urine, sputum
Page 1 of 15
, ©PREP4EXAMS @2024 [REAL EXAM DUMPS] Wednesday, July 17, 2024 1:27 AM
C pleural fluid, brain abscess
D ear, leg tissue - ✔️✔️C pleural fluid, brain abscess
Three sets of blood cultures were obtained from an adult patient with fever and suspected
endocarditis. The aerobic bottle of one set had growth of Staphylococcus epidermidis at 5
days of incubation. This indicates that:
a there was low-grade bacteremia
b the organism is most likely a contaminant
c the patient has a line infection
d the blood culture bottles are defective - ✔️✔️b the organism is most likely a contaminant
b Coagulase-negative staphylococci are commonly associated with contaminated blood
cultures; however, they are also increasing as a cause of true bacteremia. Significant
bacteremia in a patient with endocarditis is usually continuous and low grade. In most cases,
all blood cultures drawn will yield positive results. The facts that only 1 bottle of 1 set was
positive, and that the bottle did not become positive until day 5 of incubation, indicate that
this isolate is most likely a contaminant.
An expectorated sputum is sent to the laboratory for culture from a patient with respiratory
distress. The Gram stain of the specimen shows many squamous epithelial cells (>25/lpf) and
rare neutrophils. The microscopic appearance of the organisms present include:
moderate gram-positive cocci in chains and diplococci moderate gram-negative diplococci
moderate palisading gram-positive bacilli all in moderate amounts
This Gram stain is most indicative of:
a a pneumococcal pneumonia
b an anaerobic infection
c an Haemophilus pneumonia
d oropharyngeal flora - ✔️✔️d oropharyngeal flora
d Sputum specimen quality is assessed to determine if the specimen is representative of the
site of infection. The presence of white blood cells is an indicator of infection, and presence
of squamous epithelial cells is an indicator of oropharyngeal contamination.
Page 2 of 15
MLT Microbiology Quiz Exam Practice
Questions and Answers (100% Pass)
Proper media for culture of a urethral discharge from a man include:
A) chocolate and modified Thayer-Martin agars
B) Sheep blood and phenylethyl alcohol agars
C) Eosin-methylene blue and sheep agars
D) Thioglycollate broth and chocolate agar - ✔️✔️A) chocolate and modified Thayer-Martin
agars
A sheep blood agar inoculated with 0.001 mL of urine grow 70 colonies of staphylococcus
aureus. How many colonies forming units per mL of urine should be reported?
A) 70
B) 70,000
C) 700
D) 7,000 - ✔️✔️B) 70,000
Which selective medium is used for the isolation of gram-positive microorganisms?
a Columbia CNA with 5% sheep blood
b trypticase soy agar with 5% sheep blood
c eosin methylene blue
d modified Thayer-Martin - ✔️✔️a Columbia CNA with 5% sheep agar
Which of the following specimen requests is acceptable?
A rectal swab submitted for direct smear for gonococci
B feces submitted for a aerobic culture
C Foley catheter tip submitted for aerobic culture
D urine for culture of acid fast bacilli - ✔️✔️D) urine for culture of acid fast bacilli
Which of the following groups of specimens would be acceptance for anaerobic culture
A vaginal, eye
B urine, sputum
Page 1 of 15
, ©PREP4EXAMS @2024 [REAL EXAM DUMPS] Wednesday, July 17, 2024 1:27 AM
C pleural fluid, brain abscess
D ear, leg tissue - ✔️✔️C pleural fluid, brain abscess
Three sets of blood cultures were obtained from an adult patient with fever and suspected
endocarditis. The aerobic bottle of one set had growth of Staphylococcus epidermidis at 5
days of incubation. This indicates that:
a there was low-grade bacteremia
b the organism is most likely a contaminant
c the patient has a line infection
d the blood culture bottles are defective - ✔️✔️b the organism is most likely a contaminant
b Coagulase-negative staphylococci are commonly associated with contaminated blood
cultures; however, they are also increasing as a cause of true bacteremia. Significant
bacteremia in a patient with endocarditis is usually continuous and low grade. In most cases,
all blood cultures drawn will yield positive results. The facts that only 1 bottle of 1 set was
positive, and that the bottle did not become positive until day 5 of incubation, indicate that
this isolate is most likely a contaminant.
An expectorated sputum is sent to the laboratory for culture from a patient with respiratory
distress. The Gram stain of the specimen shows many squamous epithelial cells (>25/lpf) and
rare neutrophils. The microscopic appearance of the organisms present include:
moderate gram-positive cocci in chains and diplococci moderate gram-negative diplococci
moderate palisading gram-positive bacilli all in moderate amounts
This Gram stain is most indicative of:
a a pneumococcal pneumonia
b an anaerobic infection
c an Haemophilus pneumonia
d oropharyngeal flora - ✔️✔️d oropharyngeal flora
d Sputum specimen quality is assessed to determine if the specimen is representative of the
site of infection. The presence of white blood cells is an indicator of infection, and presence
of squamous epithelial cells is an indicator of oropharyngeal contamination.
Page 2 of 15
