Identify the type of hypersensitivity reaction in each photo.

Question

Accepted Answer

Hey, everyone. Let's take a look at this question together in a clinical trial for a new drug. Participants experience joint pain and rash three weeks after starting the medication, which type of hypersensitivity is most likely responsible is it answer choice? A type four, delayed type hypersensitivity. Answer choice B type one, immediate hypersensitivity. Answer choice C type three which is immune complex mediated hypersensitivity or answer choice D type two or cytotoxic hypersensitivity. Let's work this problem out together to try to figure out which of the following answer choices is the type of hypersensitivity that is most likely responsible for these participants experiencing joint pain and rash. So, in order to solve this question, we have to recall what we have learned about each of the following types of hypersensitivity to determine which type of hypersensitivity is most likely responsible for these participants in the clinical trial for a new drug, experiencing joint pain and rash. Three weeks after starting the medication and we can recall that the symptoms of joint pain and rash indicate immune complex formation and inflammation within vessels and organs which those symptoms of the joint pain and the rash are consistent with type three hypersensitivity. Therefore, answer choice. C type three hypersensitivity is the correct answer. As type three hypersensitivity or immune complex mediated hypersensitivity is related to the immune complex formation and inflammation within vessels and organs that are the symptoms that these patients are experiencing. So, answer choice C type three immune complex mediated hypersensitivity is the correct answer. And all other answer choices are incorrect as type four hypersensitivity, which is delayed, type hypersensitivity reflects T cell mediator responses that occurred days after exposure and does not include joint pain or rash. Answer choice B type one hypersensitivity, which is immediate hypersensitivity we know is incorrect as these symptoms do not match those that are typically associated with an immediate allergic response. And lastly answer choice D type two hypersensitivity, which is the cytotoxic hypersensitivity. We know from the symptoms that these patients are experiencing that there is no indication of direct cell destruction which would be expected in type two hypersensitivity. So only answer choice C is the correct answer. I hope you found this video to be helpful. Thank you and goodbye.

Identify the type of hypersensitivity reaction in each photo.
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