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