Question 1

A woman is being treated for systemic lupus erythematosus (SLE).She has an increased risk of opportunistic infections.Based on what you know about SLE and the treatment for it,propose why she has an increased risk of opportunistic infections.

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Question 2

Are superantigen reactions beneficial or harmful to the host? What is different about a superantigen reaction compared to normal antigen-host cell interactions?

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Question 3

Why do individuals with genetic defects that prevent neutrophil or macrophage development usually die at an early age? Be specific and detailed in your answer to demonstrate your knowledge on the role of these cells in the immune system.

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Question 4

A child is stung by a bee at the beginning of the summer and has mild swelling and itching at the site of the sting.In late summer,the child is stung again,but this time rapidly develops anaphylaxis and is diagnosed with type I hypersensitivity to bee venom.If the child is allergic to bee venom,why was there no reaction after the first bee sting? What specifically happened after the first sting that led to the allergic reaction?

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Question 5

Assume you are the procurement manager of the medical charity "Doctors Without Borders" and there was an imminent infectious disease epidemic threat in a remote village in Africa.The epidemic can be prevented by vaccinating the population of interest.However,due to bad roads and lack of fast transportation services to reach the site of interest,which type of vaccine would you purchase for this job considering the length of time it would take to reach the affected site and why? A live attenuated virus or killed virus vaccines?

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Question 6

If you were given a new necklace and developed reddening,swelling,and itching of your skin around your neck 24 hours after putting on the necklace,what reason would you give to this phenomenon? What immune cells are involved?

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Question 7

You are bitten by a venomous snake at a nature center.A snake handler is also bitten.You are rushed to the emergency room and given an antiserum.The snake handler does not receive treatment because he said he was exposed to venom so many times that he is immune.What is antiserum and will you have long-lasting immunity to snake venom after this? Is what the snake handler said possible or should he also receive treatment? If he does not receive treatment and is not affected,what is protecting him?

Accepted Answer

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Quiz 24: Immunity and Host Defense

A woman is being treated for systemic lupus erythematosus (SLE).She has an increased risk of opportunistic infections.Based on what you know about SLE and the treatment for it,propose why she has an increased risk of opportunistic infections.

Are superantigen reactions beneficial or harmful to the host? What is different about a superantigen reaction compared to normal antigen-host cell interactions?

Why do individuals with genetic defects that prevent neutrophil or macrophage development usually die at an early age? Be specific and detailed in your answer to demonstrate your knowledge on the role of these cells in the immune system.

If you were given a new necklace and developed reddening,swelling,and itching of your skin around your neck 24 hours after putting on the necklace,what reason would you give to this phenomenon? What immune cells are involved?