Podcast
Questions and Answers
What is the most common bacterial cause of folliculitis?
What is the most common bacterial cause of folliculitis?
- Escherichia coli
- Pseudomonas aeruginosa
- Staphylococcus aureus (correct)
- Streptococcus pyogenes
Which bacterial species are typically associated with cellulitis?
Which bacterial species are typically associated with cellulitis?
- Escherichia coli and Klebsiella pneumoniae
- Enterococcus faecalis and Bacillus anthracis
- Staphylococcus aureus and Streptococcus pyogenes (correct)
- Pseudomonas aeruginosa and Proteus mirabilis
Which of the following bacterial species is a known cause of impetigo?
Which of the following bacterial species is a known cause of impetigo?
- Bacillus cereus
- Streptococcus pneumoniae
- Staphylococcus epidermidis
- Staphylococcus aureus (correct)
Which clinical manifestation is typically associated with folliculitis?
Which clinical manifestation is typically associated with folliculitis?
Which of the following best describes the clinical presentation of cellulitis?
Which of the following best describes the clinical presentation of cellulitis?
What is a characteristic feature of impetigo?
What is a characteristic feature of impetigo?
Risk of folliculitis is increased with which of the following?
Risk of folliculitis is increased with which of the following?
Which of these conditions is LEAST likely to be associated with cellulitis?
Which of these conditions is LEAST likely to be associated with cellulitis?
Non-bullous impetigo is characterized by what?
Non-bullous impetigo is characterized by what?
According to the mnemonic 'Follicles Flare From Friction & Staph,' what are the key components associated with folliculitis?
According to the mnemonic 'Follicles Flare From Friction & Staph,' what are the key components associated with folliculitis?
The mnemonic 'Cellulitis Spreads Soft & Swollen' (CELL) emphasizes which clinical features of cellulitis?
The mnemonic 'Cellulitis Spreads Soft & Swollen' (CELL) emphasizes which clinical features of cellulitis?
Which mnemonic is used to recall key features of impetigo?
Which mnemonic is used to recall key features of impetigo?
A patient presents with a cluster of red bumps around their beard area, each with a hair in the center. The patient mentions frequent shaving. Which condition is most likely?
A patient presents with a cluster of red bumps around their beard area, each with a hair in the center. The patient mentions frequent shaving. Which condition is most likely?
A child presents with superficial skin infection on their face and hands exhibiting honey-colored crusted lesions. Which condition is most likely?
A child presents with superficial skin infection on their face and hands exhibiting honey-colored crusted lesions. Which condition is most likely?
A patient presents with a painful, spreading, warm, and red area on their lower leg. There is no pus noted. The patient reports a fever and rapid spread of the affected area. Which condition is most likely?
A patient presents with a painful, spreading, warm, and red area on their lower leg. There is no pus noted. The patient reports a fever and rapid spread of the affected area. Which condition is most likely?
Differentiate between bullous and non-bullous impetigo based on their clinical presentation.
Differentiate between bullous and non-bullous impetigo based on their clinical presentation.
A patient is diagnosed with cellulitis following a break in the skin due to tinea pedis (athlete's foot). Which of the following bacterial organisms is LEAST likely to be the causative agent in this scenario?
A patient is diagnosed with cellulitis following a break in the skin due to tinea pedis (athlete's foot). Which of the following bacterial organisms is LEAST likely to be the causative agent in this scenario?
A 3-year-old child presents with numerous vesicles that have ruptured, forming honey-colored crusts around the nose and mouth. Microscopic examination reveals Gram-positive cocci in clusters. Further testing to determine the MOST likely causative agent should include:
A 3-year-old child presents with numerous vesicles that have ruptured, forming honey-colored crusts around the nose and mouth. Microscopic examination reveals Gram-positive cocci in clusters. Further testing to determine the MOST likely causative agent should include:
Compare and contrast the sites associated with folliculitis versus impetigo, hypothesizing why these conditions predominate in those areas
Compare and contrast the sites associated with folliculitis versus impetigo, hypothesizing why these conditions predominate in those areas
Flashcards
Folliculitis
Folliculitis
Inflammation of hair follicles, often caused by Staphylococcus aureus.
Cellulitis
Cellulitis
An acute infection of the dermis and subcutaneous tissue, commonly caused by Staphylococcus aureus or Group A Streptococcus.
Impetigo
Impetigo
A superficial skin infection, more common in children, caused by Staphylococcus aureus or Streptococcus pyogenes, characterized by honey-colored crusts.
Clue for Cellulitis
Clue for Cellulitis
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Clue for Impetigo
Clue for Impetigo
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Clue for Folliculitis
Clue for Folliculitis
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Staphylococcus aureus
Staphylococcus aureus
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Staphylococcus aureus
Staphylococcus aureus
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Staphylococcus aureus
Staphylococcus aureus
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Papules or Pustules
Papules or Pustules
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Study Notes
- Bacterial skin infections are caused by microorganisms.
- The clinical manifestations of common bacterial skin infections can be described.
Primary Causative Organisms
- Folliculitis is most commonly caused by Staphylococcus aureus but can be caused by fungal, viral, or mechanical irritation.
- Cellulitis is caused by Staphylococcus aureus and Group A Streptococcus (Streptococcus pyogenes).
- Impetigo is caused by Staphylococcus aureus (including MRSA) and Streptococcus pyogenes.
Clinical Manifestations
- Folliculitis involves inflammation of hair follicles, erythematous papules or pustules around follicles, itching, and tenderness.
- Folliculitis commonly occurs on the scalp, extremities, or beard area, and the risk increases with occlusive clothing, sweating, or shaving.
- Cellulitis is an acute infection of the dermis and subcutaneous tissue, characterized by a warm, red, swollen, and tender area without clear borders.
- Cellulitis may involve fever, malaise, and lymphangitis and commonly occurs in the legs, often from breaks in the skin or tinea pedis.
- Impetigo is a superficial infection, more common in children, that begins as vesicles or pustules, which rupture to form a honey-colored crust.
- Impetigo usually occurs on the face and hands and presents in two forms: non-bullous (most common) and bullous (toxin-mediated).
Folliculitis Mnemonic
- "Follicles Flare From Friction & Staph" is a mnemonic for Folliculitis.
- The mnemonic is "4 Fs" standing for Follicles (hair-based infection), Friction (shaving, tight clothing), Flare = red papules/pustules, Frequent cause: Staph aureus.
- Folliculitis commonly occurs on the scalp, beard, and thighs.
- A clue for identifying folliculitis is red bumps with a hair in the center.
Cellulitis Mnemonic
- "Cellulitis Spreads Soft & Swollen" is a mnemonic for Cellulitis.
- The mnemonic is "CELL" standing for Color: red, hot, Edema: swelling, Less defined borders, Legs = common site.
- Cellulitis is caused by Staph aureus and Strep pyogenes.
- A clue for identifying cellulitis is warm, painful, spreading redness without pus.
- Watch out for fever, lymphangitis, and rapid spread with Cellulitis.
Impetigo Mnemonic
- "Impetigo is Itchy, Infantile, and Icky" is a mnemonic for Impetigo.
- The mnemonic is "HONEY."
- Impetigo is characterized by a honey-colored crust and is commonly seen during outbreaks in kids.
- Impetigo typically occurs on the nose and mouth.
- Impetigo affects external skin layers (superficial) and has yellowish scabs from broken vesicles.
- Impetigo is caused by Staph aureus (including MRSA!) and Strep pyogenes.
- A clue for identifying impetigo is painless blisters → rupture → crust.
- Bullous (blisters, toxin-driven) and non-bullous (crusts only, most common) are the two forms of impetigo.
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