I have a question on #124 in the BS section, from the H. pylori passage.
Q: The ELISA is a test that is often used to detect antibodies to a particular organism. Would a positive result from such a test for H. pylori indicate the patient had an ulcer?
A) No, because the patient could have been exposed to H. pylori and eliminated it
C) Yes, because the patient must have cells of H. pylori present to produce antibodies
I narrowed it down to these two choices, but incorrectly chose C. I take some issue with the solution, because it seems to suggest that upon pathogen exposure, we are pumping our blood full of antibodies all the time, and a random ELISA will always pick up on this increased level of antibody production.
Correct me if I'm wrong, but doesn't the humoral/antibody response need to be triggered first by antigen presenting cells and helper T's? In my mind, this would only happen if the bacteria is present.
Does our body produce antibodies for every pathogen we've encountered before, 24/7?
Thanks in advance!
Q: The ELISA is a test that is often used to detect antibodies to a particular organism. Would a positive result from such a test for H. pylori indicate the patient had an ulcer?
A) No, because the patient could have been exposed to H. pylori and eliminated it
C) Yes, because the patient must have cells of H. pylori present to produce antibodies
I narrowed it down to these two choices, but incorrectly chose C. I take some issue with the solution, because it seems to suggest that upon pathogen exposure, we are pumping our blood full of antibodies all the time, and a random ELISA will always pick up on this increased level of antibody production.
Correct me if I'm wrong, but doesn't the humoral/antibody response need to be triggered first by antigen presenting cells and helper T's? In my mind, this would only happen if the bacteria is present.
Does our body produce antibodies for every pathogen we've encountered before, 24/7?
Thanks in advance!
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