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Gram Neg Bacilli
| Question | Answer |
|---|---|
| What does H. influenzae cause? | Purulent meningitis in children (genus: Hemophilus) |
| What is the name of the immunization given to prevent infection with H. influenzae? | Hib Hemophilus- influenza type: B |
| Which Gram negative bacilli are tiny, fastidious ? | H. influenzae, H. ducreyi, H. aegyptious |
| Which Gram negative bacilli causes conjunctivitis (pink eye)? | H. aegyptious |
| What does H. ducreyi cause? | Soft cancre or chancroid (STD ulcer with soft edges) |
| What are clue cells? | Gram stain of discharge; will show squamous A # of species in excess epithelial cells covered with tiny Gram Neg Bacilli |
| What does Gardnerella vaginalis cause? | Vaginitis, NGU (non gonoccal urethritis in men) Diagnosed with clue cells |
| What does Bordetella pertussis cause? | Whooping cough |
| What does the "P" in the DPT immunize against? | Pertussis |
| Which type of bacilli inhabit/cause disease in the intestine? | Enteric bacilli |
| What characteristics do all Enterobacteriaceae have? | **REMEMBER all forment glucose; (all Gram Neg, aerobic..) |
| What grows on an EMB (eosin methylene blue, lactose) plate? | Only Gram Neg bacilli, this plate is selective and differential. |
| On EMB what do colonies that ferment lactose look like? | Have a dark, purple center |
| On EMB what do colonies that do not ferment lactose look like? | Colorless center |
| What does E. coli (Escherichia coli) look like on EMB? | Metallic sheen; lactose positive |
| What can E. coli cause? | UTI, pyelonephritis, infant diarrhea, enteropathic - enterotoxin causing dehydration, diarrhea, death |
| How is E. coli used in a coliform count? | As an indicator of fecal contamination |
| What does Shigella dysenteriae cause? | Bacillary dysentery; enteric pathogen |
| Where does Shigella primarily cause damage? | In intestine, does not enter blood stream, multiplies in intestine, invades mucous membranes produces intestine ulcers |
| How is Shigella transmitted? | oral fecal route, contaminated water 5 Fs feces, fingers, food, flies, fomites (objects) |
| What does oral fecal route mean? | From feces of pt./carrier into the mouth of the victim. |
| What does Salmonella typhosa cause? | Causes typhoid fever - enteric pathogen |
| How is S. typhosa transmitted? | Oral fecal |
| What does a person ingest that causes Salmonella food poisoning? | A large # of organisms - other animal species. |
Created by:
chelsapiee
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