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Staphylococcus Aureus Presentation
Transcript of Staphylococcus Aureus Presentation
Unknown Organism ID
Tests of Choice
Role in Disease
MRSA and VRSA
MRSA is methicillin-resistant S.aureus
About 40-60% of staph infections can be treated with methicillin
Vancomycin used as the standard treatment for MRSA
VRSA Vancomycin resistant S.aureus
antibiotics used against VRSA
- cocci= sphere
narrow beta hemolysis
Test #1: Catalase Test
Rationale: Looks for the presence of
the catalase enzyme
+ result - result
Test #2: Coagulase Test
Rationale: Looks for presence of
Test #3: Mannitol Salt Agar
Rationale: Looks for ability
of S.aureus to use mannitol
with the production of acid which lowers pH of the medium
What is S.aureus???
Bacterium that is a member of the Firmicutes
Staphylococcus was first identified in 1880 in Scotland by surgeon Sir Alexander Ogston
S.aureus is apart of both the skin and anterior nares of the nasal passage's normal microbiota.
20% of the human population are long-term carriers of S.aureus.
One of the 5 Primary cause of nosocomial infections of patients during their hospital stay.
S.aureus is responsible for many infections but may also occur as a commensal
Presence of S.aureus doesnt always indicate infection
Parenteral and mucous membrane Portals of Entry
Spreads by contact, skin-to-skin, fomites, and prosthetic devices
Coagulase, hyaluronidase, and DNase
superantigen, exfoliative toxins, and other toxins
Scalded Skin Syndrome
Collection of specimens
Identification of the bacteria
Confirmation of diagnosis
Rapid diagnostic tests
Identification of Toxins
Antimicrobial assay studies
other superficial skin infections in humans
low blood pressure
human to human contact
basic hand washing techniques effective in preventing its transmission.
Ethanol has proven to be an effective topical sanitizer against MRSA.
S. aureus is killed in 1 minute at 78 °C and 10 minutes at 64 °C
Google Search, images
S- Staphylococcus aureus
S- Methicillin-resistant S. aureus