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BIOD 171 Portage Learning Exam 5 Questions And Answers
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BIOD 171 Portage Learning Exam 5 QuestionsAnd Answers
Define the definition of universal precautions. - ANSWER Any samples, known or
unknown are to be treated as hazardous materials.
What would a researcher be certain to observe when analyzing a microbial sample? -
ANSWER Size, shape, motility, gram status, presence of chemical reactions, changes in
color, capture images
What non-selective but differential agar plate should be used if a suspected
Streptococcus sample is present? - ANSWER BAP
What disease can result if a patient with streptococcal pharyngitis goes untreated? -
ANSWER Rheumatic fever.
Streptococcus, E.coli, pseudomonas, and klebsiella all are capable of causing what
disease? - ANSWER All are capable of causing septicemia. Blood poisoning.
What is a facultative anaerobe? - ANSWER A facultative anaerobe is capable of growth
under both aerobic and anaerobic conditions.
A bacterial swab is taken from a patient with impetigo and streaked across an MSA
plate. After incubation at 37C, what color will the agar be? ANSWER The agent is staph
aureus. Fermentation will lower the pH and change the dye from red to yellow.
If you were trying to identify a patient suspected to have tuberculosis, what differential
stain would you use and why? ANSWER Acid-fast stain to see the microbe.
At the module, which mycobacterium infection does the WHO treat free of charge?
, ANSWER Leprosy
What are the three major conditions caused bye the botulism toxin? ANSWER
Foodborne, infant, wound.
Why are babies prone to botulism? - ANSWER Because they are still developing and lack
of adult microbiota.
What is the mechanism of action of toxin produced by clostridium tenani? - ANSWER
Muscle stiffness and spasm.
What Gram-negative bacterium might be exposed in a dirty hot tub. - ANSWER
Legionella
What are the three forms of plague and what regions do they affect? - ANWER Bubonic,
pneumonic, septicemic.
Which STD, according to the module may be best diagnosed by using dark field
microscopy? - ANWER Syphilis
The treatment of all samples, known or unknown as potentially hazardous or pathogenic
materials is referred to as __________. - ANWER Universal precautions
When dealing with an unknown sample of limited amounts, a researcher must be able to
determine the following observations, 1. presence or absence of any motility and 2. its
gram status using the same sample. One cannot make two different preparations from
the liquid sample. Which would you determine first and why? - ANSWER The motility
would need to be done first. In order to view motility a wet mount is required. Gram
staining needs heat and the heat kills the bacteria.
A facultative anaerobe is a microorganism capable of growth under what conditions? -
ANSWER A facultative anaerobe can grow under with oxygen and without.
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