Neisseria and Moraxella Catarrhalis

Neisseria and Moraxella Catarrhalis epidemiology, morphology, culture characteristics, diagnostic biochemical tests, and serology.

32 cards   |   Total Attempts: 186
  

Cards In This Set

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What is the gram rxn and microscopic arrangement of Neisseria and moraxella catarrhalis?
Gram negative diplococci
Are Neisseria and moraxella catarrhalis oxidase positive or negative?
Positive
What disease does Neisseria gonorrhoeae cause and where can it infect?
Gonorrheacervix, conjunctiva, pharyngeal surface, anorectal area and urethra of males
When is N. gonorrhoeae considered significant?
It is always significant
What diseases do N. meningitidis cause?
Bacterial meningitis and Waterhouse-Friderichsen syndrome
How is N. meningitidis transmitted?
Person to person via contaminated resp. droplets
How can N. meningitidis infection be prevented?
Vaccine, but no vaccine against most common Group B
What infection is N. cinerea assoc with and what can it be confused with?
Newborn conjunctivitsconfused with N. gonorrhoeae because can be weak glucose +
What infections are moraxella cattarhalis assoc with?
Otitis, bronchitis, sinusitis, laryngitis, endocarditis and meningitsusually localized resp. infections
How should specimens suspected of Neisseria and moraxella be collected?
No cotton swabs used, inoculate directly or within 6hr to Martin Lewis agar, DO NOT REFRIGERATE!!!
What special precaution must be taken for blood cultures suspected of Neisseria?
SPS must not exceed 0.025% because toxic to N. gonorrhoeae and meningitidis
What types of media are used to cultivate Neisseria and Moraxella?
All but N. gonorrhoeae grow well on 5% sheep blood and chocolate (rest don't grow on Martin Lewis)N. gonorrhoeae requires enriched chocolate (Martin Lewis)
What incubation conditions should be used to cultivate neisseria and moraxhella?
3-7% CO2 at 35-37oC
What antimicrobials are in Martin Lewis agar?
Vancomycin - inhibits gram +colistin - inhibits gram - except NeisseriaAnisomycin or Nystatin - inhibits yeastSXT - inhibits Proteus
What is the colonial appearance of N. gonorrhoeae on Martin Lewis?
Gray white shiny