Exam (elaborations)
AAB MT Microbiology Questions with Solutions
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Exam of 15 pages for the course AAB MT at AAB MT (AAB MT Microbiology)
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AAB MT MicrobiologyWhat term describes the morphology of organisms that vary in shape and size? -
answer Pleomorphic
Capsules are the basis of which test? - answer Serotyping
A mucoid colony on blood agar medium indicates that which of the following
characteristics may be present? - answer Organism has a capsule.
What are dark staining granules called? - answer Metachromatic
Which of the following organisms are non-motile? - answer Shigella and Klebsiella
In the bacterial growth cycle, growth ceases because nutrients are exhausted or toxic
metabolic products have accumulated in which phase? - answer Stationary phase
Which of the following genera of bacteria form spores? - answer Bacillus and
Clostridium
What term is used to describe bacteria that grow in the absence of atmospheric oxygen
and obtain oxygen from oxygen-containing compounds? - answer Anaerobes
What is the temperature at which bacteria grow best known as? - answer Optimum
On blood agar 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
hemolysis
What is the most effective method of sterilization? - answerAutoclaving
Which of the following 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
Which one of the following disinfectants is the most effective germicide against bacteria,
spores, tubercle bacilli, fungi, and viruses? - answerChlorine
What is a term that 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
Acid-fast bacteria appear what color microscopically? - answerRed
Acid-fast organisms in tissue are best stained by which of the following methods? -
answerKinyoun
Which of the following should be used to remove antimicrobials before culturing? -
answerAntimicrobial removal device
Which statement concerning sodium polyanethol sulfonate (SPS) is NOT true? -
answerActivates some antimicrobials
What are some functions of sodium polyanethol sulfonate (SPS)? - answerPrevents
blood from clotting, prevents phagocytosis, and neutralizes the bactericidal effect of
human serum.
What is the most abundant normal flora in throat cultures? - answerAlpha-hemolytic
streptococci
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.
What is the most common pathogen is throat cultures? - answerStreptococcus
pyogenes
Nasopharangeal swabs are recommended for the detection of which carriers? -
answerH. influenzae, N. meningitidis, and 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 CSF are usually stained with which stain? - answerGram stain
Which of the following tests for bacterial antigen on cultures isolated from CSF is more
sensitive and faster? - answerLatex agglutination tests
Which of the following is not the cause of a venereal disease? - answerHaemophilus
aegyptius
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