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Exam (elaborations)

AAB MT Microbiology Questions with Solutions

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  • AAB MT
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Exam of 15 pages for the course AAB MT at AAB MT (AAB MT Microbiology)

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  • August 20, 2024
  • 15
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • AAB MT
  • AAB MT
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Dreamer252
AAB MT Microbiology

What 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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