A patient with symptoms of allergies would have an elevation of which of the following :

Options

A. IgE
B. WBC count
C. IgD
D. IgM

Explanation

**Step-by-Step Solution:**

1. **Understanding Allergies**: Allergies are hypersensitive reactions of the immune system to certain substances known as allergens. When a person is exposed to an allergen, their immune system overreacts.

2. **Role of Mast Cells**: In allergic reactions, mast cells, which are a type of white blood cell, play a crucial role. They become activated upon exposure to an allergen.

3. **Release of Histamine**: Once activated, mast cells release various substances, including histamine. Histamine is responsible for many of the symptoms associated with allergies, such as itching, swelling, and redness.

4. **Increased IgE Levels**: In response to allergens, the immune system produces Immunoglobulin E (IgE) antibodies. These antibodies bind to allergens and trigger the release of histamine from mast cells.

5. **Identifying the Correct Answer**: Given the context of the question, a patient with allergy symptoms would have elevated levels of IgE antibodies. Therefore, the correct answer is that there would be an elevation of IgE.

6. **Excluding Other Options**: Other options such as WBC count, IgD, and IgM do not specifically correlate with allergic reactions in the same way that IgE does. Thus, they are not the correct answers.

**Final Answer**: The elevation would be in IgE levels.

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