Neisseria and Moraxella Catarrhalis (Exam 2) Flashcards
Which organism is capable of utilizing glucose only?
N. gonorrhoeae
Which organism is capable of utilizing glucose and maltose?
N. meningitidis
Which organism is capable of utilizing glucose, maltose and lactose?
N. lactima
Which organism is asaccharolytic?
M. catarrhalis
Which organism is often identified by its positive results for DNase, nitrate reduction, and B-lactimase tests?
M. catarrhalis
What are the special collection and transportation criteria for N. gonorrhoeae?
“Bedside inoculation” into Jembec transport media, using non-nutritive swabs, and a CO2 atmosphere (from media container)
What is the typical gram stain of N. gonorrhoeae from male genital specimens?
Increased PMNs and intracellular GNDC
Why is a direct patient specimen gram stain not used as a preliminary N. gonorrhoeae diagnostic test for females?
Because other Neisseria species can be normal vaginal flora
What percentage of males with N. gonorrhoeae are asymptomatic?
3-5%
What percentage of females with N. gonorrhoeae are asymptomatic?
50%
What percentage of females with a genital N. gonorrhoeae infection contract a concurrent rectal infection?
30-60%
Which species of Neisseria is the causative agent of ocular infections in newborns and is transferred from mother to baby during vaginal delivery?
N. gonorrhoeae
What is the gram stain for Neisseria and Moraxella catarrhalis?
Gram negative diplococci
What biochemical test do Neisseria and Moraxella catarrhalis have in common?
Oxidase positive
What are the common growth requirements for Neisseria and Moraxella catarrhalis?
aerobic, capnophilic (CO2 dependent), and high humidity