BIOD 171 Module 5 Questions with Verified Solutions |Latest 2024/2025

BIOD 171 Module 5 Questions with Verified
Solutions.

While visiting his grandparents, a 10-year-old child has green beans for
_;- _;- _;- _;- _;- _;- _;- _;- _;- _;- _;-


dinner that were harvested from his grandparents' garden and canned
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the previous year. Severe illness sets in and the child is taken to the
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hospital. Botulism is suspected, but what form? Explain your answer.
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Food-borne botulism. The child is too old (> 6 months) to be
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considered for infant botulism and wounds were not present. The green
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beans were likely improperly canned and under the low- acidic,
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anaerobic conditions, bacterial growth was encouraged.
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While observing an unknown sample of limited amounts, a researcher
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must determine motility and Gram status using the same sample. What
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would you determine first and why?
_;- Motility would be determined
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before gram status because motility is easily observed on a wet mount.
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The sample would need to be killed through heat fixing in order to
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determine gram status _;- _;-




Describe the symptoms and treatment regimen for someone infected
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with Clostridium perfringens
_;- Symptoms include muscle necrosis, _;- _;-_;- _;- _;- _;- _;- _;-


fever, gas, and swelling. Treatment includes removal of infection
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(sometimes amputation) followed by antibiotics _;- _;- _;- _;-




Identify the medical condition characterized by robust carbohydrate
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fermentation under anaerobic conditions, swelling of the infected areas
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and fever
_;- gas gangrene _;-_;- _;- _;-

,A facultative anaerobe is a microorganism capable of growth under what
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conditions? It is capable of growth under both anaerobic and
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aerobic conditions _;-




As Streptococcus is catalase negative would it thrive or die in the
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presence of peroxides? Why? It would die. Because it is catalase
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negative it wouldn't be able to breakdown peroxides.
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Streptococcus is most often streaked onto: _;- _;- _;- _;- _;-




- Chocolate agar
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- EMB agar
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- Blood agar
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- Spirit Blue agar
_;- _;- _;- _;-_;- _;- Blood agar _;-




Strep is often cultured on Blood agar plates to determine its hemolytic
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properties, which aids in the classification (and differentiation) process.
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True or False. The Lancefield groups are used to subdivide antigenic
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groups of gamma-hemolytic Streptococcus.
_;- False
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The Lancefield groupings are used to subdivide beta-hemolytic Strep
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Greater than 90% of all human streptococcal infections belong to:
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, - Group C
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- Group B
_;- _;-




- Group A
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- Group D
_;- _;- _;-_;- _;- Group A _;-




Group A is the causative agent behind> 90% of all strep infections
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Rheumatic fever displays ______ hemolytic activity and occurs when
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_______ is left untreated.
_;- _;- _;-




Beta; Rheumatic fever
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Alpha; Strep. Pharyngitis
_;- _;-




Beta; Strep. Pharyngitis
_;- _;-




Gamma; Strep. Septicemia _;- _;- _;-_;- _;- Beta; Strep. Pharyngitis
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Strep throat (also known as strep. Pharyngitis) can lead to Rheumatic
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fever if left untreated and displays beta-hemolytic activity
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True or False. Under most circumstances, staphylococcus can be found in
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~80% of human population where it remains non-symptomatic.
_;- _;- False
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Staphylococcus is only found in (symptomatic) -30% of all human
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populations