ch. 9 infection Flashcards
Which of the following is NOT a stage of pathologic infection? Colonization Invasion Death Spread
Death
A person presents with a bacterial infection and a temperature of 40º C (104º F). Which of the following statements regarding fever is TRUE?
Fever is a failure of the body to regulate temperature.
An endogenous pyrogen may produce fever.
The body’s central thermostat is the pituitary gland.
Fever is a failure of the body’s defense system.
An endogenous pyrogen may produce fever
Which of the following terms describes an agent’s ability to produce disease? Virulence Pathogenicity Infectivity Immunogenicity
Pathogenicity
A person is exposed to group A beta-hemolytic Streptococcus, a bacterium. Which of the following statements regarding the immune system and its response is TRUE?
C3b is effective in adhering bacteria to the phagocytic receptor.
C5b-C9 kills viruses.
Antibodies phagocytose microorganisms.
Natural killer cells attack bacteria.
C3b is effective in adhering bacteria to the phagocytic receptor
Which of the following is NOT a mechanism of antigenic variation? Siderophoric switching Mutation Recombination Gene switching
Siderophoric switching
Which of the following is a TRUE statement regarding bacteremia?
It occurs with a normal defense system of the body.
It is always caused by gram-positive bacteria.
Endotoxins often cause symptoms such as vasodilation.
Symptoms include increased blood pressure.
Endotoxins often cause symptoms such as vasodilation
A person presents with a virus. Which of the following statements regarding viruses is TRUE?
Viruses are less common than bacterial infections.
Viruses actively produce exotoxins.
Viruses bypass many defense mechanisms by developing intracellularly.
Viruses contain all their genetic information in RNA.
Viruses bypass many defense mechanisms by developing intracellularly
Which of the following is NOT a mechanism used by viruses to evade the immune response? Rapid division Intracellular survival Self-protein coat Lipopolysaccharide
Lipopolysaccharide
Which of the following contributes to antibiotic-resistant pathogens? Inadequate sanitation Genetic mutation Loss of multidrug transporters Limited use of antibiotics
Genetic mutation
