Neisseria Species and Their Natural Habitats Quiz

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What is the significance of pili in Neisseria gonorrhoeae?

Inhibit phagocytosis by neutrophils (correct)

Prevent the organism from adhering to host tissues

Promote the action of IgG antibodies

Directly cause inflammation in body tissues

What is the primary function of LOS (lipooligosaccharide) in Neisseria meningitidis?

Mediate damage to body tissues (correct)

Block inflammatory responses

Prevent antigenic variation

Serve as a protective device for the organism

Why are types T3 through T5 of N.gonorrhoeae considered avirulent?

They lack pili (correct)

They possess high adherence to host cells

They inhibit phagocytosis by neutrophils

They directly damage host tissues

What is the role of IgA protease in Neisseria species?

Cleave IgA on mucosal surfaces Signup and view all the answers

Which protein in Neisseria species is protective against the host's inflammatory response and serum complement-mediated killing?

Protein I (Por) Signup and view all the answers

Which Neisseria species is always pathogenic and not considered part of the normal biota?

Neisseria gonorrhoeae Signup and view all the answers

What is the primary reason that Neisseria gonorrhoeae and Neisseria meningitidis are considered strict human pathogens?

They have receptors for human transferrin Signup and view all the answers

Which Neisseria species, although primarily a commensal in dogs, has been isolated from dog bites in humans?

Neisseria weaveri Signup and view all the answers

What is a characteristic shared by pathogenic Neisseria species that contributes to their virulence?

Production of a capsule Signup and view all the answers

Which type of habitat do pathogenic Neisseria species typically inhabit in the human body?

Respiratory and urogenital tracts Signup and view all the answers

Neisseria Species and Their Natural Habitats Quiz

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Questions and Answers

What is the significance of pili in Neisseria gonorrhoeae?

What is the primary function of LOS (lipooligosaccharide) in Neisseria meningitidis?

Why are types T3 through T5 of N.gonorrhoeae considered avirulent?

What is the role of IgA protease in Neisseria species?

Which protein in Neisseria species is protective against the host's inflammatory response and serum complement-mediated killing?

Which Neisseria species is always pathogenic and not considered part of the normal biota?

What is the primary reason that Neisseria gonorrhoeae and Neisseria meningitidis are considered strict human pathogens?

Which Neisseria species, although primarily a commensal in dogs, has been isolated from dog bites in humans?

What is a characteristic shared by pathogenic Neisseria species that contributes to their virulence?

Which type of habitat do pathogenic Neisseria species typically inhabit in the human body?

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