Capacity to invade intact mucus membranes or skin with abrasions
Most common sites of inoculation are the vagina or cervix in the female and the penis in the male
Only piliated cells (formerly, colony types T1 and T2) are virulent by attaching to intact mucus membranes, penetrating into and passing through mucosal cells, and establishing infection in the sub-epithelial layer
Seriously underreported, sexually transmitted disease found only in humans with strikingly different epidemiological presentations for females and males
Major reservoir is asymptomatic carriage in females
Microscopy reveals encapsulated, small, gram-negative diplococci inside polymorphonuclear leukocytes (PMN's) in urethral purulent discharge
Penicillin is no longer the drug of choice because MIC has steadily increased, and plasmid-mediated enzymatic hydrolysis and chromosomally-mediated resistance has risen to >10% of all strains
Ceftriazxone, cefixime, or a fluoroquinolone for uncomplicated cases and in combination with doxycycline or azithromycin for dual infections with other STD's
Pili-mediated, receptor-specific colonization of nonciliated cells of nasopharynx
Antiphagocytic polysaccharide capsule allows systemic spread
Toxic effects mediated by hyperproduction of lipooligosaccharide (LOS) lacking O-side chain
Meningitis, meningococcemia, pneumonia, arthritis, urethritis following dissemination of virulent organisms from the nasopharynx
Large numbers (>10e7 organisms/ml) of encapsulated, small, gram-negative diplococci in the presence of polymorphonuclear leukocytes (PMN's) in cerebrospinal fluid (CSF)
Serogroups A, B, C, Y, W135
Transparent, non-pigmented, oxidase-positive, nonhemolytic colonies on chocolate blood agar with enhanced growth in moist atmosphere with 5% CO2
Although patients with systemic disease generally are bacteremic, commercial blood culture bottles contain toxic additives that may inhibit growth
Differentiated from other species in the genus by acid production from glucose and maltose, but not sucrose or lactose
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