Which of the following is NOT a mechanism for avoiding destruction by a phagocyte?
A) Some pathogens escape from the phagosome before it fuses with lysosomes.
B) Some pathogens prevent phagosome-lysosome fusion.
C) Some microbes can survive the destructive environment within the phagolysosome.
D) Some microbes produce IgA protease that cleaves IgA, the class of antibody found in mucus and other secretions.
E) These are all mechanisms for avoiding phagocytic destruction.

Question

Which of the following is NOT a mechanism for avoiding destruction by a phagocyte?
A) Some pathogens escape from the phagosome before it fuses with lysosomes.
B) Some pathogens prevent phagosome-lysosome fusion.
C) Some microbes can survive the destructive environment within the phagolysosome.
D) Some microbes produce IgA protease that cleaves IgA, the class of antibody found in mucus and other secretions.
E) These are all mechanisms for avoiding phagocytic destruction.

Quizplus · Accepted Answer

Option D describes a mechanism by which some microbes evade the immune system by cleaving IgA, an antibody involved in mucosal immunity, rather than directly avoiding destruction by phagocytes. Options A, B, and C all describe mechanisms by which pathogens can avoid destruction by phagocytes, making D the correct choice as it does not.

Which of the Following Is NOT a Mechanism for Avoiding