Topic 20: Bacteria of the Skin

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21 Terms

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Normal microbiota
________ of the skin tend to be resistant to drying and to relatively high salt concentrations.
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propionic acid
Produce ________ that maintains the pH of the skin between 3- 5.
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gram positive
Most bacteria on the skin are ________ and salt- tolerant.
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coagulase
Produces ________, enzyme that coagulates the fibrin in blood, is pathogenic.
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perspiration and sebum are nutritive for certain microorganisms
normal microbiota of the skin
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Why is the skin generally an inhospitable environment for most microorganisms?
dryness; sebum; salt
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Dry layers of ___-containing cells that make up the epidermis are not easily colonized by most microbes.
keratin
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What secreted by oil glands inhibits bacterial growth?
sebum
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Salt in perspiration create a ___ environment.
hypertonic
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What is nutritive for the normal microbiota of the skin?
perspiration and sebum
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Most bacteria on the skin are found in ___ areas such as axilla and sides of nose.
moist
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Where are transient microbiota located on the skin?
hands and arms in contact with the environment
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What live in hair follicles on sebum from oil glands?
proprionibacterium
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What produces propionic acid?
proprionibacterium
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What is the function of propionic acid?
maintains the pH of the skin
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What is the pH of skin?
3-5
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Most bacteria on the skin are gram___ and ___.
positive and salt tolerant
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What is a member of the normal microbiota of the skin and is also considered a pathogen?
staphylococcus aureus
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Staphylococcus aureus produces ___, an enzyme that coagulates the fibrin in blood.
coagulase
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What makes staphylococcus aureus pathogenic?
production of coagulase
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What is used to distinguish S. aureus from other species of staphylococcus?
presence of coagulase