Day3 Flashcards
GN diplococci found in a kidney bean shape. Requires enrichment media. Most are non-pathogenic inhabitants of the oropharyngeal and nasopharyngeal mucus membranes
Oxidase positive
DNase negative
Neisseria spp.
Two or more methods should be used to confirm the ID of N.gonorrhoeae due to its social implications .
Biochemical/Serological testing of culture
Performed immediately on urethral discharge from males with asymptomatic gonococcal urethritis. Only provides a presumptive diagnosis for N.gonorrhoeae
Direct Examination: Gram Stain for GN intracelllular diplococci with PMNs
Non pathogenic Neisseria spp. That utilizes carbohydrates glucose, maltose and lactose. Is not found in kidney bean shape
Neisseria lactima
Pathogenic Neisseria spp that utilizes carbohydrates glucose and maltose. Is not found in kidney bean shape as often. Can be isolated in blood and CSF cultures
Neisseria meningitidis
Non pathogenic Neisseria species that grows well on BAP
Neisseria sicca and Neisseria subflava
Pathogenic Neisseria spp that utilizes carbohydrate glucose only. Can be found both intra and extra cellularly. Can be isolated not genital, throat and rectal cultures. Can cause OPHTHALMIA IN NEWBORNS and PID
Neisseria gonnorhoeae
The most common isolates of this species are nonliquefaciens and catarrhalis.
Moraxella spp.
This organism is oxidase positive and is sometimes called GMC because it is coccobacillary. It was previously assigned to the Branhamella genus.
Moraxella catarrhalis
What does pathogenic Neisseria spp require for growth?
Chocolate or Thayer- Martin media
grows best in humidity and increased CO2
All species are oxidase positive and DNase negative
Neisseria spp.
Which species of Neisseria is not found in kidney bean shape?
Neisseria meningitidis and Neisseria lactima
What was M.catarrhalis formerly known as?
Branharnella catarrhalis
