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Unit 2
Normal Mouth Flora/Presumptive N. gonorrhoeae
Question | Answer |
---|---|
What are the two pathogenic mouth flora species? | Streptococcus pyogenes and Arcanobacterium haemolyticum. |
Which test employs the fermentation of four different sugars to differentiate pathogenic Neisseria from saprophytic Neisseria? | API Quad-Ferm+ |
True or false: Staph aureus, Micrococcus, and yeast are all considered normal oral flora? | True. Normal Gram positive oral flora include Alpha strep, Staph epidermidis, Staph aureus, Strep pneumo, Beta Strep Groups B and F, small colony morphology Beta Strep Groups C and G, Gamma Strep, Diphtheroids, Micrococcus, and Aerococcus. |
What antibiotics are present in Modified-Thayer-Martin media and what are their functions? | Vancomycin to inhibit Gram positive organisms, Colistin to inhibit Gram negative rods, Nystatin to inhibit yeasts, and Trimethoprim Lactate to inhibit Proteus and Gram negatives that are resistant to Colistin. |
What does Arcanobacterium haemolyticum look like on Gram stain and on agar? | Arcanobacterium haemolyticum looks like a Diphtheroid-like Gram positive rod on Gram stain and resembles Beta strep on agar. |
What are the normal Gram negative mouth flora species? | Gram negative rods, saprophytic Neisseria species, Haemophilus parainfluenzae, and Haemophilus influenzae. |
How does pathogenic Neisseria appear on Gram stain? | Gram negative diplococci |
What locations must a presumptive Neisseria gonorrhea sample be cultured from? | Normal sexual sites including the vagina or urethra. |
What type of test is the Gonogen II and what does it test for? | It is a monoclonal antibody test that is used to confirm Neisseria gonorrhea. |
What species is routinely looked for on all throat cultures from patients less than 30 years old? | Arcanobacterium haemolyticum is routinely tested for on all throat cultures from patients under 30 as it can cause severe pharyngitis. |