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Microbiology - Bacteriology > Aerobic Gram Negative Cocci > Flashcards

Aerobic Gram Negative Cocci Flashcards

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Biology 101 flashcards
1
Q

What shape do Neisseria bacteria have?

A

Diplococci

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2
Q

Are Neisseria species oxidase positive or negative?

A

Positive

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3
Q

What type of medium is Thayer-Martin?

A

Selective culture medium for Neisseria species

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4
Q

What sugars can Neisseria gonorrhoeae ferment?

A

Glucose only

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5
Q

True or False: Neisseria meningitidis can ferment maltose.

A

True

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6
Q

Fill in the blank: Neisseria species are commonly arranged in pairs known as _____

A

Diplococci

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7
Q

What is the main characteristic of Thayer-Martin medium?

A

It inhibits the growth of other bacteria while allowing Neisseria to grow.

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8
Q

Which Neisseria species is responsible for gonorrhea?

A

Neisseria gonorrhoeae

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9
Q

Which sugar can Neisseria meningitidis ferment?

A

Glucose and maltose

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10
Q

What is the primary clinical significance of Neisseria species?

A

They can cause infections such as gonorrhea and meningitis.

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11
Q

Multiple Choice: Which of the following sugars can Neisseria gonorrhoeae ferment? A) Glucose B) Maltose C) Sucrose D) Lactose

A

A) Glucose

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12
Q

True or False: Neisseria species can be found in normal human flora.

A

True

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13
Q

What color do oxidase positive bacteria turn in the oxidase test?

A

Purple

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14
Q

Fill in the blank: Neisseria species are often cultured in _____ environments.

A

Carbon dioxide enriched

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15
Q

What is the main component in Thayer-Martin medium that suppresses other organisms?

A

Antibiotics

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16
Q

Which Neisseria species is known to cause bacterial meningitis?

A

Neisseria meningitidis

17
Q

What type of bacteria are Neisseria classified as?

A

Gram-negative cocci

18
Q

Multiple Choice: Which of the following is NOT a characteristic of Neisseria species? A) Diplococci B) Fermentative C) Anaerobic D) Oxidase positive

A

C) Anaerobic

19
Q

What is the primary reservoir for Neisseria meningitidis?

A

Humans

20
Q

True or False: Neisseria can grow on regular agar without any special conditions.

A

False

21
Q

What is the typical appearance of Neisseria colonies on Thayer-Martin agar?

A

Small, grayish colonies

22
Q

Fill in the blank: Neisseria species require _____ for growth.

A

Moist environments

23
Q

What is the role of glucose in the metabolism of Neisseria species?

A

It serves as a primary energy source.

24
Q

What is the biochemical test used to identify Neisseria species?

A

Oxidase test

25
Q

Which Neisseria species ferments lactose?

A

None of the common pathogenic Neisseria species ferment lactose.

26
Q

True or False: Neisseria species are known to produce a capsule.

A

True, particularly Neisseria meningitidis.

27
Q

Fill in the blank: Neisseria meningitidis can be identified by its ability to ferment _____ and _____.

A

Glucose and maltose

28
Q

What is the preferred temperature for culturing Neisseria species?

A

35-37 degrees Celsius

29
Q

Which Neisseria species is often associated with outbreaks in crowded settings?

A

Neisseria meningitidis

30
Q

Multiple Choice: Which of the following is a common symptom of gonorrhea? A) Rash B) Painful urination C) Cough D) Fever

A

B) Painful urination

31
Q

What is the significance of the oxidase test in identifying Neisseria?

A

It confirms the presence of cytochrome c oxidase.

32
Q

Fill in the blank: Neisseria species can be differentiated from other bacteria by their _____.

A

Morphology and biochemical tests

33
Q

True or False: Neisseria species can survive in dry conditions.

A

False

34
Q

What is a common laboratory technique used to isolate Neisseria species?

A

Culture on selective media

35
Q

Which Neisseria species is primarily transmitted through sexual contact?

A

Neisseria gonorrhoeae

36
Q

What type of infections can Neisseria species cause?

A

Sexually transmitted infections and meningitis

37
Q

Fill in the blank: Neisseria species require _____ for optimal growth.

A

Carbon dioxide

38
Q

What is the main treatment for Neisseria gonorrhoeae infections?

A

Antibiotics

39
Q

Which Neisseria species is known to cause septicemia?

A

Neisseria meningitidis

Microbiology - Bacteriology (6 decks)

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