AAB MT MICROBIOLOGY QUESTIONS WITH VERIFIED SOLUTIONS.
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Course
AAB MT MICROBIOLOGY
Institution
AAB MT MICROBIOLOGY
What term describes the morphology of organisms that vary in shape and size? - CORRECT ANSWER Pleomorphic
Capsules are the basis of which test? - CORRECT ANSWER Serotyping
A mucoid colony on blood agar medium indicates that which of the following characteristics may be prese...
AAB MT MICROBIOLOGY 2024-2025
QUESTIONS WITH VERIFIED SOLUTIONS.
What term describes the morphology of organisms that vary in shape and size? -
CORRECT ANSWER Pleomorphic
Capsules are the basis of which test? - CORRECT ANSWER Serotyping
A mucoid colony on blood agar medium indicates that which of the following
characteristics may be present? - CORRECT ANSWER Organism has a capsule.
What are dark staining granules called? - CORRECT ANSWER Metachromatic
Which of the following organisms are non-motile? - CORRECT ANSWER
Shigella and Klebsiella
In the bacterial growth cycle, growth ceases because nutrients are exhausted or
toxic metabolic products have accumulated in which phase? - CORRECT ANSWER
Stationary phase
Which of the following genera of bacteria form spores? - CORRECT 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? - CORRECT
ANSWER Anaerobes
,AAB MT MICROBIOLOGY 2024-2025
QUESTIONS WITH VERIFIED SOLUTIONS.
What is the temperature at which bacteria grow best known as? - CORRECT
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? -
CORRECT ANSWER Alpha-prime hemolysis
What is the most effective method of sterilization? - CORRECT ANSWER
Autoclaving
Which of the following is used for quality control for the dry heat oven? -
CORRECT ANSWER Bacillus subtilis
Media that cannot be heated can be sterilized by what alternate method? -
CORRECT ANSWER Filtration
Which one of the following disinfectants is the most effective germicide against
bacteria, spores, tubercle bacilli, fungi, and viruses? - CORRECT ANSWER
Chlorine
What is a term that describes a process or treatment that renders a medical
device, instrument, or environmental surface safe to handle? - CORRECT
ANSWER Decontamination
,AAB MT MICROBIOLOGY 2024-2025
QUESTIONS WITH VERIFIED SOLUTIONS.
What color do gram-positive bacteria stain? - CORRECT ANSWER Purple
Acid-fast bacteria appear what color microscopically? - CORRECT ANSWER
Red
Acid-fast organisms in tissue are best stained by which of the following methods? -
CORRECT ANSWER Kinyoun
Which of the following should be used to remove antimicrobials before culturing? -
CORRECT ANSWER Antimicrobial removal device
Which statement concerning sodium polyanethol sulfonate (SPS) is NOT true? -
CORRECT ANSWER Activates some antimicrobials
What are some functions of sodium polyanethol sulfonate (SPS)? - CORRECT
ANSWER Prevents blood from clotting, prevents phagocytosis, and neutralizes
the bactericidal effect of human serum.
What is the most abundant normal flora in throat cultures? - CORRECT ANSWER
Alpha-hemolytic streptococci
, AAB MT MICROBIOLOGY 2024-2025
QUESTIONS WITH VERIFIED SOLUTIONS.
Why is it recommended to stab the blood agar plate when setting up throat
cultures? - CORRECT ANSWER Some streptococci may not produce beta
hemolysis under aerobic conditions.
What is the most common pathogen is throat cultures? - CORRECT ANSWER
Streptococcus pyogenes
Nasopharangeal swabs are recommended for the detection of which carriers? -
CORRECT ANSWER H. influenzae, N. meningitidis, and B. pertussis
Why is a first morning urine specimen preferred for urine cultures? - CORRECT
ANSWER Specimen is more concentrated.
What indicates vaginal or urethral contamination of urine? - CORRECT ANSWER
Greater than 10 squamous epithelial cells per hpf.
How are smears of cerebrospinal fluid prepared? - CORRECT ANSWER
Centrifuged CSF sediment
Smears of CSF are usually stained with which stain? - CORRECT ANSWER
Gram stain
Which of the following tests for bacterial antigen on cultures isolated from CSF is
more sensitive and faster? - CORRECT ANSWER Latex agglutination tests
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