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Micro Quiz 5/9/12
| Question | Answer |
|---|---|
| What is the gram stain of Staphylococcus? | Gram Positive in a cocci cluster |
| 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. |
| 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) |
| What is the characteristic lesion of S. aureus? | Abscess -Pus forming ability , limited ability to spread. MRSA |
| Where is S. epidermidis normal flora? | Skin, throat and vagina |
| What is the gram stain of Streptococcus? | Gram Pos cocci chains |
| What does fastidious mean? | Difficult to grow |
| What does Strep require in the atmosphere to grow? | Carbon Dioxide |
| Define alpha hemolysis | Green halo surrounding colony hemolysis slight or incomplete |
| Define beta hemolysis | Clear colorless halo |
| Define gamma hemolysis | no change in blood surrounding colony |
| Which Lancefield group of the beta Streptococcus is the most pathogenic? | Group A S. pyogenes |
| Which Lancefield group causes infection in newborns? | Group B |
| What does GBS stand for? | Group B Strep |
| What organism is the bacitracin disk test used on? | Beta hemolytic strep |
| What does the positive test look like on the bacitracin disk test? | Zone of growth inhibition |
| What does a negative test look like on the bacitracin disk test? | No zone of growth inhibition |
| Which organism is positive on the bacitracin disk test? | Group A Beta strep |
| Which organism is negative on the bacitracin disk test? | Beta strep- NOT group A |
| What test should you preform if the rapid strep test is negative? | throat culture on ss agar. |
| What is the characteristic lesion of beta hemolytic Streptococci? | Cellulitis |
| 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 |
| Where is Enterococcus normal flora and what kind of infection does it frequently cause? | Intestine- Urinary Tract Infection (UTI) |
| What is the typical colony appearance of Streptococcus pneumonia? | Gray, mucoid, translucent and alpha hemolytic |
| What is the gram stain of S. pneumoniae? | Gram positive cocci pairs |
| What is the characteristic lesion of S. penumoniae? | Fibrin in the areas of inflammation |
| What disease does S. pneumoniae cause? | Lobar pneumonia and otitis media(ear infections) |
Created by:
lecopple1
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