Neiserria Flashcards
Catalase + except for
N.elongata
useless to grow in agar plates
Neisseria
o main virulence factor
o provides the means of attachment to the organism
Pili or fimbriae
Can be found in urogenital tract, anorectal area, oropharynx or
conjunctiva
N.gonnor
Requires iron for growth
• Glucose fermenter
N.gonnor
Principal virulence of N.gonnor
Common pili
2 main cells infected by N. gonorrhoeae:
non-ciliated columnar
▪ transitional epithelium
Ophthalmia neonatorum is caused by?
N.gonnor
Puruleng arthritis is caused by
N.gonnot
N,gonnor is oxidase what?
Oxidase positive
• Exaggerated version of catalase test (3% H2O2)
• 30% hydrogen peroxide
• Intense bubble formation/effervescence
Superoxol test
Found as commensal inhabitants of the URT
Invasive pathogens
• Transmission of the organism is via airborne droplets
N.mening
Accompanied by the appearance of petechiae and may
lead to Disseminated Intravascular Coagulation (DIC)
N.mening
takes place when the organism becomes fulminant
▪ rapid spread throughout the body
▪ Disseminated Intravascular Coagulation
Waterhouse-Friderichsen syndrome. N.mening
on culture, has a dry, wrinkled, adherent and breadcrumbs
like colonies
N. sicca
Yellow pigmented Neisseria species): In
culture, colonies show yellow pigmentation
N.flavescence
commonly found in the nasopharynx of infants and
children
N. lactamica
Resembles Neisseria especially under the microscope
o somewhat not really pathologic compared to Neisseri
M. Catar
3rd most common cause of otitis media and sinusitis in children
M.catar
Most isolates produce B-lactamase
• Small gram-negative cocci that tend to grow in pair with
adjacent sides flattened
M.catar
On culture: smooth, opaque, gray to white colonies with
“hockey puck” appearance
M.catar
