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Questions and Answers
Which of the following is true about normal flora?
Which of the following is true about normal flora?
- Resident flora re-establishes itself when disturbed (correct)
- It always causes disease in a healthy person
- It consists of only opportunistic pathogens
- Transient flora permanently inhabits the skin
Under what conditions do opportunistic pathogens cause disease?
Under what conditions do opportunistic pathogens cause disease?
- Only when suitable opportunities arise (correct)
- When interacting with resident flora
- In the presence of intact immunological and anatomical defenses
- When the host is unhealthy
Which of the following is an example of resident normal flora?
Which of the following is an example of resident normal flora?
- Streptococcus pneumoniae in the intestine
- Escherichia coli on the oropharynx
- Staphylococcus epidermidis on the skin (correct)
- Alpha-hemolytic Streptococci in the respiratory tract
How long does transient flora inhabit the skin or mucous membrane?
How long does transient flora inhabit the skin or mucous membrane?
What type of organisms make up transient flora?
What type of organisms make up transient flora?
Flashcards
Resident Flora
Resident Flora
Normal flora that can re-establish itself after disturbance.
Opportunistic Pathogens
Opportunistic Pathogens
Pathogens that cause disease only when the opportunity arises.
Staphylococcus epidermidis
Staphylococcus epidermidis
Bacteria that normally lives on the skin
Transient Flora
Transient Flora
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Transient Flora Organisms
Transient Flora Organisms
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Study Notes
Normal Flora
- Normal flora refers to the microorganisms that are present on the skin and mucous membranes of a healthy individual.
- They are usually harmless and can even be beneficial to the host.
Opportunistic Pathogens
- Opportunistic pathogens cause disease when the host's immune system is compromised or when the normal flora is disrupted.
- This can occur due to various factors such as old age, antibiotics, or underlying medical conditions.
Resident Normal Flora
- An example of resident normal flora is Staphylococcus epidermidis, which is a bacterium that is commonly found on the skin.
Transient Flora
- Transient flora inhabit the skin or mucous membrane for a short period of time, usually less than 24 hours.
- Transient flora are typically composed of microorganisms that are acquired from the environment, such as bacteria, viruses, and fungi.
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