Podcast
Questions and Answers
What is the function of capsule in microbial strategies?
What is the function of capsule in microbial strategies?
- Facilitate genetic recombination
- Promote rapid cell division
- Aid adhesion and provide protection against phagocytosis (correct)
- Enhance energy production
Which component of Streptococcus pyogenes resists phagocytosis?
Which component of Streptococcus pyogenes resists phagocytosis?
- Ribosomal RNA
- M protein (correct)
- Cell wall polysaccharides
- Capsule
How do some pathogens evade host defenses related to antigenic variation?
How do some pathogens evade host defenses related to antigenic variation?
- By increasing their metabolic rate
- By inhibiting host cell apoptosis
- By altering their surface antigens through activating alternative genes (correct)
- By forming biofilms on host tissues
What leads to antigenic shift in influenza viruses?
What leads to antigenic shift in influenza viruses?
What is the function of coagulase in pathogen invasion?
What is the function of coagulase in pathogen invasion?
What is the role of siderophores in pathogen growth?
What is the role of siderophores in pathogen growth?
Why do some pathogens produce enzymes like hyaluronidase and collagenase?
Why do some pathogens produce enzymes like hyaluronidase and collagenase?
What advantage do intracellular bacteria gain by entering host cells?
What advantage do intracellular bacteria gain by entering host cells?
What is the primary reason for pathogens to multiply after adherence?
What is the primary reason for pathogens to multiply after adherence?
What is the purpose of invasion facilitated by enzymes like hyaluronidase and collagenase?
What is the purpose of invasion facilitated by enzymes like hyaluronidase and collagenase?
Strep. pneumoniae's M protein aids in phagocytosis resistance.
Strep. pneumoniae's M protein aids in phagocytosis resistance.
Mycobacterium tuberculosis's mycolic acid resists digestion by phagocytes.
Mycobacterium tuberculosis's mycolic acid resists digestion by phagocytes.
Influenza virus uses antigenic drift to create small antigenic changes over time.
Influenza virus uses antigenic drift to create small antigenic changes over time.
Antigenic shift in influenza viruses occurs when two different viruses are mixed in a cell.
Antigenic shift in influenza viruses occurs when two different viruses are mixed in a cell.
Pathogens may not produce virulence factors until sufficient numbers are present
Pathogens may not produce virulence factors until sufficient numbers are present
Free iron is high in humans and readily available to microorganisms
Free iron is high in humans and readily available to microorganisms
Siderophores allow bacteria to take up host iron
Siderophores allow bacteria to take up host iron
Collagenase breaks down collagen network supporting tissues and promotes spread of infection
Collagenase breaks down collagen network supporting tissues and promotes spread of infection
Some pathogens enter directly inside host cells to gain advantages
Some pathogens enter directly inside host cells to gain advantages
Bacteria regulate their environment by expressing specific genes and live inside their own vacuole
Bacteria regulate their environment by expressing specific genes and live inside their own vacuole
Invasins are enzymes that break down host tissues to facilitate pathogen spread
Invasins are enzymes that break down host tissues to facilitate pathogen spread
Salmonella alters the host actin to enter host cells
Salmonella alters the host actin to enter host cells
