Neisseria and Moraxella Catarrhalis (Exam 2) Flashcards

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1
Q

Which organism is capable of utilizing glucose only?

A

N. gonorrhoeae

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2
Q

Which organism is capable of utilizing glucose and maltose?

A

N. meningitidis

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3
Q

Which organism is capable of utilizing glucose, maltose and lactose?

A

N. lactima

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4
Q

Which organism is asaccharolytic?

A

M. catarrhalis

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5
Q

Which organism is often identified by its positive results for DNase, nitrate reduction, and B-lactimase tests?

A

M. catarrhalis

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6
Q

What are the special collection and transportation criteria for N. gonorrhoeae?

A

“Bedside inoculation” into Jembec transport media, using non-nutritive swabs, and a CO2 atmosphere (from media container)

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7
Q

What is the typical gram stain of N. gonorrhoeae from male genital specimens?

A

Increased PMNs and intracellular GNDC

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8
Q

Why is a direct patient specimen gram stain not used as a preliminary N. gonorrhoeae diagnostic test for females?

A

Because other Neisseria species can be normal vaginal flora

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9
Q

What percentage of males with N. gonorrhoeae are asymptomatic?

A

3-5%

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10
Q

What percentage of females with N. gonorrhoeae are asymptomatic?

A

50%

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11
Q

What percentage of females with a genital N. gonorrhoeae infection contract a concurrent rectal infection?

A

30-60%

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12
Q

Which species of Neisseria is the causative agent of ocular infections in newborns and is transferred from mother to baby during vaginal delivery?

A

N. gonorrhoeae

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13
Q

What is the gram stain for Neisseria and Moraxella catarrhalis?

A

Gram negative diplococci

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14
Q

What biochemical test do Neisseria and Moraxella catarrhalis have in common?

A

Oxidase positive

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15
Q

What are the common growth requirements for Neisseria and Moraxella catarrhalis?

A

aerobic, capnophilic (CO2 dependent), and high humidity

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16
Q

What media is usually used to recover pathogenic Neisseria and Moraxella catarrhalis? Which organism is the exception?

A

MTM; N. lactima is non-pathogenic and grows on MTM as well.

17
Q

Which species of Neisseria is the causative agent of meningitis and bacteremia/septicemia?

A

N. meningitidis

18
Q

What is the fatality rate of meningitis caused by N. meningitidis?

A

10-15%

19
Q

What is the fatality rate of septicemia/bacteremia caused by N. meningitidis?

A

25%

20
Q

Which organism is the causative agent of Waterhouse-Friderickson syndrome, which causes adrenal hemorrhaging?

A

N. meningitidis

21
Q

Are there special lab precautions taken when working with N. meningitidis?

A

Yes, must work under biosafety hood if the organisms is suspected

22
Q

Which organism is known to cause otitus media, specifically in small children

A

M. catarrhalis

23
Q

Which organism is considered normal upper respiratory flora?

A

M. catarrhalis

24
Q

Which organism is most commonly spread in places where people are in close contact with each other?

A

N. meningitidis

25
Q

What are the abrupt onset symptoms of N. meningitidis?

A

headache, stiffness of the neck, confusion and light sensitivity

26
Q

Who is normally affected by N. meningitidis?

A

Infants and adolescents