22 Questions
Which bacteria uses coagulase to cause blood to coagulate?
Staphylococcus aureus
What is the name of the enzyme that breaks down hyaluronic acid, found in connective tissues?
Hyaluronidase
Which of the following is NOT a type of hemolysin?
Delta (δ) Hemolytic
Which bacteria uses a capsule to evade the host's natural defense?
Streptococcus pneumoniae
What is the name of the enzyme that breaks down collagen, found in many connective tissues?
Collagenase
Which of the following is an example of an antiphagocytic factor?
Capsule
Which bacteria uses surface proteins to evade the host's natural defense?
Staphylococcus aureus
What is the name of the enzyme that breaks down lecithin, a mixture of fats essential to cells in the human body?
Lecithinase
Which of the following bacteria is an example of surviving inside phagocytes?
Tubercle bacillus
What is the primary mechanism of immune evasion used by bacteria that exhibit genetic variability?
Antigenic variation
What is the term used to describe the capacity of an organism to cause disease by means of toxins produced by the organism?
Toxicity
Which type of toxin damages host cell membranes?
Cytolytic toxins
What is the primary difference between exotoxins and endotoxins?
Type of bacteria producing them
What is the component of endotoxins responsible for toxicity?
Lipid A portion
Which of the following is an example of a type III toxin?
Toxin that inhibits protein synthesis in heart muscle
What is the term used to describe the ability of bacteria to resist the action of phagocytes?
Immune evasion
What is the primary function of fimbriae or pili in bacterial adhesion?
To resist flushing by the body's defense mechanisms
What is the minimum number of Vibrio cholerae cells required to cause disease in 50% of inoculated test animals?
10^8 cells
What is the primary role of surface hydrophobicity in bacterial adhesion?
To enhance binding to host cell receptors
Which of the following is an exception to the need for bacterial invasion to cause disease?
Bacteria that produce toxins
What is the term for the lethal dose of a microbe's toxin that will kill 50% of experimentally inoculated test animals?
Lethal Dose 50
What is the primary role of glycocalyx in bacterial adhesion?
To provide a capsule or slime layer for adherence
This quiz covers the ability of Corynebacterium diphtheriae to cause symptomatic sore throat and the role of degradative enzymes in bacterial pathogenicity, including coagulase and kinases.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
