(Complete) MLT Microbiology Exams/ Microbiology
BOC MLT Exam/ MLT-240 Clinical Microbiology Final
Exam| +1100 Questions with Verified Answers/ Grade
A Score Guide
What term describes the morphology of organisms that vary in size and shape? -
ANSWERpleomorphic
Capsules are the basis of which test? - ANSWERserotyping
A mucoid colony on blood agar medium indicates that which characteristic may be
present? - ANSWERorganism has a capsule
What are dark staining granules called? - ANSWERmetachromatic
Which organisms are non motile? - ANSWERShigella and Klebsiella
In the bacterial growth cycle, growth ceases because nutrients are exhausted or toxic
metabolic products have accumulated in what phase? - ANSWERstationary phase
What genera of bacteria form spores? - ANSWERBacillus, Clostridium
What term is used to describe bacteria that grow in the absence of atmospheric
oxygen and obtain oxygen from oxygen-containing compounds? -
ANSWERanaerobes
What is the temperature at which bacteria grow best known as? - ANSWERoptium
On blood sugar plates a small zone of alpha hemolysis surrounded by a zone of beta
hemolysis after refrigeration is known as what type of hemolysis? - ANSWERalpha-
prime
What is the most effective method of sterilization? - ANSWERautoclaving
What is used for quality control for the dry heat oven? - ANSWERBacillus subtilis
Media that cannot be heated can be sterilized by what alternate method? -
ANSWERfiltration
What disinfectant is the most effective germicide against bacteria, spores tubercle
bacilli, fungi, and viruses? - ANSWERchlorine bleach
What term describes a process or treatment that renders a medical device,
instrument, or environmental surface safe to handle? - ANSWERdecontamination
, What color do Gram-positive bacteria stain? - ANSWERpurple/ dark blue
Acid-fast bacteria appear what color microscopically? - ANSWERred
Acid-fast organisms in tissue are best stained by what method? - ANSWERKinyoun
What should be used to remove antimicrobials before culturing? -
ANSWERantimicrobial removal device
Name some characteristics concerning sodium polyanethol sulfonate (SPS)- -
ANSWERprevents blood from clotting, prevents phagocytosis, neutralizes the
bactericidal effect on human serum
What is the most abundant normal flora in throat culture? - ANSWERalpha-hemolytic
streptococci
What is the most common pathogen in throat cultures? - ANSWERStreptococcus
pyogenes
Why is it recommended to stab the blood agar plate when setting up throat
cultures? - ANSWERsome streptococci may not produce beta hemolysis under
aerobic conditions
Nasopharyngeal swabs are recommended for the detection of which carriers -
ANSWERH. influenzae, N. meningitidis, B. pertussis
Why is a first morning urine specimen preferred for urine cultures? -
ANSWERspecimen is more concentrated
What indicates vaginal or urethral contamination of urine? - ANSWERgreater than 10
squamous epithelial cells per hpf
How are smears of cerebrospinal fluid prepared? - ANSWERcentrifuged CSF sediment
Smears of cerebrospinal fluid are usually stained with which stain? - ANSWERGram
stain
Which test for bacterial antigen on cultures isolated from CSF is more sensitive and
faster? - ANSWERlatex agglutination tests
What is not the cause of venereal disease? - ANSWERHaemophilus aegyptius
A positive coagulase test is observed for what? - ANSWERclotting of plasma
What is the preferred method of differentiating S. aureus from S. epidermidis? -
ANSWERcoagulase test
BOC MLT Exam/ MLT-240 Clinical Microbiology Final
Exam| +1100 Questions with Verified Answers/ Grade
A Score Guide
What term describes the morphology of organisms that vary in size and shape? -
ANSWERpleomorphic
Capsules are the basis of which test? - ANSWERserotyping
A mucoid colony on blood agar medium indicates that which characteristic may be
present? - ANSWERorganism has a capsule
What are dark staining granules called? - ANSWERmetachromatic
Which organisms are non motile? - ANSWERShigella and Klebsiella
In the bacterial growth cycle, growth ceases because nutrients are exhausted or toxic
metabolic products have accumulated in what phase? - ANSWERstationary phase
What genera of bacteria form spores? - ANSWERBacillus, Clostridium
What term is used to describe bacteria that grow in the absence of atmospheric
oxygen and obtain oxygen from oxygen-containing compounds? -
ANSWERanaerobes
What is the temperature at which bacteria grow best known as? - ANSWERoptium
On blood sugar plates a small zone of alpha hemolysis surrounded by a zone of beta
hemolysis after refrigeration is known as what type of hemolysis? - ANSWERalpha-
prime
What is the most effective method of sterilization? - ANSWERautoclaving
What is used for quality control for the dry heat oven? - ANSWERBacillus subtilis
Media that cannot be heated can be sterilized by what alternate method? -
ANSWERfiltration
What disinfectant is the most effective germicide against bacteria, spores tubercle
bacilli, fungi, and viruses? - ANSWERchlorine bleach
What term describes a process or treatment that renders a medical device,
instrument, or environmental surface safe to handle? - ANSWERdecontamination
, What color do Gram-positive bacteria stain? - ANSWERpurple/ dark blue
Acid-fast bacteria appear what color microscopically? - ANSWERred
Acid-fast organisms in tissue are best stained by what method? - ANSWERKinyoun
What should be used to remove antimicrobials before culturing? -
ANSWERantimicrobial removal device
Name some characteristics concerning sodium polyanethol sulfonate (SPS)- -
ANSWERprevents blood from clotting, prevents phagocytosis, neutralizes the
bactericidal effect on human serum
What is the most abundant normal flora in throat culture? - ANSWERalpha-hemolytic
streptococci
What is the most common pathogen in throat cultures? - ANSWERStreptococcus
pyogenes
Why is it recommended to stab the blood agar plate when setting up throat
cultures? - ANSWERsome streptococci may not produce beta hemolysis under
aerobic conditions
Nasopharyngeal swabs are recommended for the detection of which carriers -
ANSWERH. influenzae, N. meningitidis, B. pertussis
Why is a first morning urine specimen preferred for urine cultures? -
ANSWERspecimen is more concentrated
What indicates vaginal or urethral contamination of urine? - ANSWERgreater than 10
squamous epithelial cells per hpf
How are smears of cerebrospinal fluid prepared? - ANSWERcentrifuged CSF sediment
Smears of cerebrospinal fluid are usually stained with which stain? - ANSWERGram
stain
Which test for bacterial antigen on cultures isolated from CSF is more sensitive and
faster? - ANSWERlatex agglutination tests
What is not the cause of venereal disease? - ANSWERHaemophilus aegyptius
A positive coagulase test is observed for what? - ANSWERclotting of plasma
What is the preferred method of differentiating S. aureus from S. epidermidis? -
ANSWERcoagulase test
