Which of the following is incorrect about allergy ?

Options

A. Allergy is the exaggerated response of the immune system to certain antigens present in the environment .
B. Allergy is due to the release of chemicals like histamine from the eosinophils..
C. The antibodies produced in allergies are of lgE type.
D. Steroidal drugs give quick relief from allergies .

Answer

To determine which statement about allergies is incorrect, let's analyze each of the provided statements one by one:

1. **Allergy is the exaggerated response of the immune system to certain antigens present in the environment.**
- This statement is correct. Allergies occur when the immune system reacts excessively to harmless substances (allergens) like pollen, dust, or certain foods.

2. **Allergy is due to the release of chemicals like histamine from the eosinophils.**
- This statement is incorrect. While histamine is indeed released during allergic reactions, it is primarily released from mast cells, not eosinophils. Eosinophils are involved in the immune response but do not release histamine.

3. **The antibodies produced in allergies are of IgE type.**
- This statement is correct. In allergic reactions, the immune system produces Immunoglobulin E (IgE) antibodies in response to allergens.

4. **Steroidal drugs give quick relief from allergies.**
- This statement is also correct. Steroidal drugs, such as corticosteroids, can help reduce inflammation and provide relief from allergy symptoms.

Based on the analysis, the incorrect statement about allergies is the second one: "Allergy is due to the release of chemicals like histamine from the eosinophils."