When performing an Indirect ELISA, what does a positive result indicate?

Question

BlackTom AI · Accepted Answer

To approach the question, consider what an Indirect ELISA is designed to detect in a sample.
Option a: The presence of the target antibody in the specimen. This is correct because in an indirect ELISA, the plate is coated with the antigen, and the test detects whether the patient sample contains antibodies against that antigen by using a labeled secondary antibody. A positive result indicates those antibodies are present in the specimen.
Option b: The presence of the target antigen in the specimen. This would be more characteristic of a direct or sandwich ELISA, where the goal is to detect the antigen itself. In an indirect ELISA, you are not measuring antigen directly in the sample but rather antibodies against the antigen.
Option c: The specimen's overall health status. This is not a direct readout of an ELISA test. ELISA results reflect the presence or absence of specific antibodies (or antigens, depending on the assay) and do not by themselves provide a holistic health assessment.
Option d: The absence of the target antibody in the specimen. A negative result would indicate absence, but the question asks what a positive result indicates. Therefore, this statement misinterprets what a positive outcome means.
In summary, the positive result in an indirect ELISA signifies that the specimen contains antibodies targeting the antigen used in the assay, which aligns with option a.

My LMS Subjects Online quiz 6

When performing an Indirect ELISA, what does a positive result indicate?

查看解析

登录即可查看完整答案

类似问题

In agglutination tests, what does the clumping or aggregation of particulate antigens indicate?

What is the primary purpose of serology in the field of clinical diagnostic microbiology?

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

Which of the following statement regarding cost is correct:

Under the assumptions used in cost-volume-profit analysis, as the activity increases:

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单