Micro Quiz 5/9/12
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the gram stain of Staphylococcus? | Gram Positive in a cocci cluster
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| What is an enterotoxin? | An exotoxin that cause gastrointestinal symptoms like nausea, vomiting, diarrhea. Produced by S. aureus. It is a common cause of food poisoning.
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| What are some infections caused by S. aureus? | A. Boils
B. Pimples/ Acne
C. Wounds/ Post op
D.TSS
E. HAI- Health care Associated Infection.(nosocomial)
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| What is the characteristic lesion of S. aureus? | Abscess
-Pus forming ability , limited ability to spread.
MRSA
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| Where is S. epidermidis normal flora? | Skin, throat and vagina
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| What is the gram stain of Streptococcus? | Gram Pos cocci chains
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| What does fastidious mean? | Difficult to grow
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| What does Strep require in the atmosphere to grow? | Carbon Dioxide
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| Define alpha hemolysis | Green halo surrounding colony hemolysis slight or incomplete
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| Define beta hemolysis | Clear colorless halo
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| Define gamma hemolysis | no change in blood surrounding colony
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| Which Lancefield group of the beta Streptococcus is the most pathogenic? | Group A S. pyogenes
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| Which Lancefield group causes infection in newborns? | Group B
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| What does GBS stand for? | Group B Strep
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| What organism is the bacitracin disk test used on? | Beta hemolytic strep
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| What does the positive test look like on the bacitracin disk test? | Zone of growth inhibition
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| What does a negative test look like on the bacitracin disk test? | No zone of growth inhibition
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| Which organism is positive on the bacitracin disk test? | Group A Beta strep
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| Which organism is negative on the bacitracin disk test? | Beta strep- NOT group A
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| What test should you preform if the rapid strep test is negative? | throat culture on ss agar.
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| What is the characteristic lesion of beta hemolytic Streptococci? | Cellulitis
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| What are the several infections caused by Group A beta hemolytic Streptococci? | A. Strep throat
B. Scarlet fever
C. AGN
D. Rheumatic Fever (RF)
E. Osteomyelitis
F. meningitis
G. acute endocarditis
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| Where is Enterococcus normal flora and what kind of infection does it frequently cause? | Intestine- Urinary Tract Infection (UTI)
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| What is the typical colony appearance of Streptococcus pneumonia? | Gray, mucoid, translucent and alpha hemolytic
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| What is the gram stain of S. pneumoniae? | Gram positive cocci pairs
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| What is the characteristic lesion of S. penumoniae? | Fibrin in the areas of inflammation
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| What disease does S. pneumoniae cause? | Lobar pneumonia and otitis media(ear infections)
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