BIOD 171 Portage Learning Exam 5 || Questions and 100% Accurate Answers.
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Course
BIOD 171 Portage Learning
Institution
BIOD 171 Portage Learning
Define the concept of universal precautions. correct answers Any samples, known or unknown are to be treated as hazardous materials.
What would a researcher be certain to note while analyzing a microbial sample? correct answers Size, shape, motility, gram status, presence of chemical reactions, ...
BIOD 171 Portage Learning Exam 5 || Questions and 100%
Accurate Answers.
Define the concept of universal precautions. correct answers Any samples, known or unknown
are to be treated as hazardous materials.
What would a researcher be certain to note while analyzing a microbial sample? correct answers
Size, shape, motility, gram status, presence of chemical reactions, changes in color, capture
images
Which non-selective yet differential agar plate should be used if a Streptococcus sample is
suspected? correct answers BAP
What disease can result if a patient with streptococcal pharyngitis goes untreated? correct
answers Rheumatic fever.
Streptococcus, E.coli, pseudomonas, and klebsiella are all capable of causing what disease?
correct answers All are capable of causing septicemia. Blood poisoning.
What is a facultative anaerobe? correct answers 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.
Following incubation at 37C, what will be the color of the agar? correct answers The agent is
staph aureus. Fermentation will lower the pH and change the dye from red to yellow.
If a patient were suspected to have tuberculosis, which differential stain would you select and
why? correct answers Acid-fast stain to visualize the microbe.
According to the module, which mycobacterium infection will be treated free of charge by the
WHO? correct answers Leprosy
What are the three main conditions caused bye the botulism toxin? correct answers Foodborne,
infant, wound.
Why are infants more susceptible to botulism? correct answers They are still maturing and lack
of adult microbiota.
What is the mechanism of action of the toxin produced by clostridium tenani? correct answers It
causes muscle stiffness and spasms.
What Gram-negative bacterium might come into contact with in a unsanitary hot tub. correct
answers Legionella
, What are the three forms of plague and what regions do they affect? correct answers Bubonic,
pneumonic, septicemic.
According to the module, which STD might be best identified via dark field microscopy? correct
answers Syphilis
The concept of treating all samples, whether known or unknown, as potentially hazardous (or
pathogenic) materials is known as __________. correct answers Universal precautions
While observing an unknown sample of limited amounts, a researcher must determine the
following observations, 1. the presence of any motility and 2. its gram status using the same
sample. The liquid sample cannot be divided. Which would you determine first and why? correct
answers The motility should be determined first. Observing motility requires a wet mount. Gram
staining requires heat and heat kills the bacteria.
A facultative anaerobe is a microorganism capable of growth under what conditions? correct
answers A facultative anaerobe can grow under with oxygen and without.
True or false: The Lancefield groups are used to subdivide antigenic groups of alpha-hemolytic
Streptococcus. correct answers False
The distinctions for Lancefield subgroups lie in its: correct answers Carbohydrate composition
Rheumatic fever displays______hemolytic activity and occurs _____if left untreated. correct
answers BETA:STREP. Pharyngitis
True or false: Under most circumstances, staphylococcus can be found in 80% of human
population where it remains non-sympotomatic correct answers False, only 30%
Define commensal bacteria correct answers The bacterium neither harms or benefits from the
host which it obtains nutrients from
How can staphylococcus be differentially tested? correct answers Staphylococcus species are
capable of growth in the presence of bile salts.
Symptoms of folliculitis correct answers Pus-filled lesions on skin or hair
Symptoms of scalded-skin syndrome correct answers Ruptured-pustules; treated with penicilin
Symptoms of Impetigo correct answers Childhood skin disease near mouth or nose
Symptoms of conjunctivitis correct answers Infections of thin, transparent scieral tissue
Symptoms of ophthalmia neonatorum correct answers Infection occurs at time of birth
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