Aerobic Gram Negative Cocci Flashcards
What shape do Neisseria bacteria have?
Diplococci
Are Neisseria species oxidase positive or negative?
Positive
What type of medium is Thayer-Martin?
Selective culture medium for Neisseria species
What sugars can Neisseria gonorrhoeae ferment?
Glucose only
True or False: Neisseria meningitidis can ferment maltose.
True
Fill in the blank: Neisseria species are commonly arranged in pairs known as _____
Diplococci
What is the main characteristic of Thayer-Martin medium?
It inhibits the growth of other bacteria while allowing Neisseria to grow.
Which Neisseria species is responsible for gonorrhea?
Neisseria gonorrhoeae
Which sugar can Neisseria meningitidis ferment?
Glucose and maltose
What is the primary clinical significance of Neisseria species?
They can cause infections such as gonorrhea and meningitis.
Multiple Choice: Which of the following sugars can Neisseria gonorrhoeae ferment? A) Glucose B) Maltose C) Sucrose D) Lactose
A) Glucose
True or False: Neisseria species can be found in normal human flora.
True
What color do oxidase positive bacteria turn in the oxidase test?
Purple
Fill in the blank: Neisseria species are often cultured in _____ environments.
Carbon dioxide enriched
What is the main component in Thayer-Martin medium that suppresses other organisms?
Antibiotics
Which Neisseria species is known to cause bacterial meningitis?
Neisseria meningitidis
What type of bacteria are Neisseria classified as?
Gram-negative cocci
Multiple Choice: Which of the following is NOT a characteristic of Neisseria species? A) Diplococci B) Fermentative C) Anaerobic D) Oxidase positive
C) Anaerobic
What is the primary reservoir for Neisseria meningitidis?
Humans
True or False: Neisseria can grow on regular agar without any special conditions.
False
What is the typical appearance of Neisseria colonies on Thayer-Martin agar?
Small, grayish colonies
Fill in the blank: Neisseria species require _____ for growth.
Moist environments
What is the role of glucose in the metabolism of Neisseria species?
It serves as a primary energy source.
What is the biochemical test used to identify Neisseria species?
Oxidase test
Which Neisseria species ferments lactose?
None of the common pathogenic Neisseria species ferment lactose.
True or False: Neisseria species are known to produce a capsule.
True, particularly Neisseria meningitidis.
Fill in the blank: Neisseria meningitidis can be identified by its ability to ferment _____ and _____.
Glucose and maltose
What is the preferred temperature for culturing Neisseria species?
35-37 degrees Celsius
Which Neisseria species is often associated with outbreaks in crowded settings?
Neisseria meningitidis
Multiple Choice: Which of the following is a common symptom of gonorrhea? A) Rash B) Painful urination C) Cough D) Fever
B) Painful urination
What is the significance of the oxidase test in identifying Neisseria?
It confirms the presence of cytochrome c oxidase.
Fill in the blank: Neisseria species can be differentiated from other bacteria by their _____.
Morphology and biochemical tests
True or False: Neisseria species can survive in dry conditions.
False
What is a common laboratory technique used to isolate Neisseria species?
Culture on selective media
Which Neisseria species is primarily transmitted through sexual contact?
Neisseria gonorrhoeae
What type of infections can Neisseria species cause?
Sexually transmitted infections and meningitis
Fill in the blank: Neisseria species require _____ for optimal growth.
Carbon dioxide
What is the main treatment for Neisseria gonorrhoeae infections?
Antibiotics
Which Neisseria species is known to cause septicemia?
Neisseria meningitidis
