Chapter 21 Flashcards
When does a vesicle become a bulla?
When it grows larger than 1cm in diameter.
What is a carbuncle? What is a furuncle?
Carbuncle: Hard round deep inflammation of tissue under the skin
Furuncle: Abscess, localized region of pus surrounded by inflamed tissue
Which Gram + bacterium causes inflammatory acne?
Propionibacterium
What are comedos and comedones?
- Comedos: whiteheads
- Comedones: blackheads
What is a virulence factor?
A virulence factor is how dangerous the microbe is. Factors that improve virulence are: pigmentation, coagulase, toxins
What are the name of the toxins that cause scalded skin syndrome?
Exfoliative toxin A and Exfoliative toxin B
Which two bacteria cause impetigo?
- Staphylococcus aureus
- Streptococcus pyogenes
How does TSST-1 affect the body?
Toxic Shock Syndrome Toxin 1 (TSST-1) causes toxic shock syndrome, leading to fever, vomiting, rash, and organ failure.
Which organic acid produced by fermenting bacteria causes inflammation in the
skin
Free fatty acids.
Which type of acne is the most severe?
Nodular cystic
What is the basis for subdividing Streptococcus into smaller divisions? You
should be able to recognize the proper Greek letters
By how much hemolysin they produce.
Why are the Group A β Strep relevant?
Because they are the most common human pathogens
In what groups of people does Group B β Strep mainly cause disease?
Mainly causes disease in newborn babies, pregnant women, the elderly, and immunosuppressed patients.
What are the toxins that contribute to necrotizing fasciitis?
Pyrogenic toxins produced by Streptococcus pyogenes acting as superantigens.
Which bacterium is associated with water and can cause problems with
swimmers or bathers?
Pseudomonas aeruginosa
