Endotoxin Levels and Virulence Factors Quiz

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What is the main purpose of bacterial virulence factors?

To increase the speed of bacterial cell division

To help bacteria communicate with each other

To aid in the evasion of the host's immune system (correct)

To promote the formation of biofilms

Which of the following is NOT a function associated with bacterial virulence factors?

Cell division regulation (correct)

Nutrient acquisition

Immune evasion

Biofilm formation

What is the role of capsule in bacterial virulence?

To promote bacterial motility

To aid in toxin secretion

To enhance host cell adhesion and colonization

To provide protection against host immune defenses (correct)

Which virulence factor is responsible for bacterial movement?

Flagella Signup and view all the answers

What is the primary function of pili or fimbriae in bacteria?

Adhesion to host cells Signup and view all the answers

Which of the following is NOT a function of extracellular matrix toxins produced by bacteria?

Immune response enhancement Signup and view all the answers

How do flagella contribute to bacterial pathogenicity?

By aiding in bacterial motility and colonization Signup and view all the answers

Which structure helps bacteria adhere to surfaces and form biofilms?

Pili Signup and view all the answers

Why is it essential for bacteria to be able to evade the host immune system?

To establish long-term infections in the host Signup and view all the answers

What can high endotoxin levels lead to in the body?

Organ failure and intravascular coagulation Signup and view all the answers

Which factor plays a significant role in determining access of certain molecules to the cell membrane?

Capsule Signup and view all the answers

Which virulence factor participates in biofilm formation?

Flagella Signup and view all the answers

How do Pili/fimbriae enhance bacteria's ability to establish infection?

By aiding in attachment to the host Signup and view all the answers

What do low density quorum-sensing autoinducers promote?

Individual cell behavior Signup and view all the answers

Which virulence factor mediates adherence to surfaces?

Pili/fimbriae Signup and view all the answers

In biofilm formation, what kind of substances make up the self-produced matrix?

Proteins, polysaccharides, released DNA Signup and view all the answers

What is the role of extracellular matrix toxins in bacterial virulence?

Participating in biofilm formation Signup and view all the answers

Which type of toxins modulate the host cell metabolism?

A-B toxins Signup and view all the answers

What is the target of Extracellular Matrix (EM) toxins?

EM targets Signup and view all the answers

What is the function of Superantigens in the context of bacterial toxins?

Triggers excessive T lymphocyte stimulation Signup and view all the answers

Which condition can result from the lack of blood flow due to shock?

Organic failure Signup and view all the answers

What allows for the free movement of bacteria according to the text?

Hyaluronic acids Signup and view all the answers

Which bacterial toxin type triggers a massive release of cytokines?

Superantigens Signup and view all the answers

Bacteriophages (viruses of bacteria) transfer bacterial DNA from one bacterium to another. Some of the transferred DNA may be VF genes. This is describing:

Transduction Signup and view all the answers

One bacterium can transfer a plasmid (mobile DNA) to another bacterium. Usually, plasmids contain VF genes. This is describing

Conjugation Signup and view all the answers

Which toxin type is known to modulate the host cell metabolism?

Type III toxins Signup and view all the answers

What effect do Membrane-damaging toxins have on cells?

Kill the cells Signup and view all the answers

Transformation. Bacteria acquire free DNA from the environment. Some of the acquired DNA may be VF genes. This is defining:

Transformation Signup and view all the answers