Questions: Multiple Select Question Select all that apply When a person's eosinophil count is elevated, it is most likely because they have recently been infected by a parasitic worm had a heart attack had a bacterial infection had an allergic reaction had the flu

The correct answers are:

• been infected by a parasitic worm
• had an allergic reaction

Explanation for each option:

1. Been infected by a parasitic worm: Eosinophils are a type of white blood cell that play a crucial role in the body's immune response to parasitic infections, particularly those caused by worms. An elevated eosinophil count is commonly associated with parasitic infections.

2. Had a heart attack: This is incorrect. While a heart attack involves inflammation and immune response, it is not typically associated with an elevated eosinophil count. Other types of white blood cells, such as neutrophils, are more commonly involved in the response to a heart attack.

3. Had a bacterial infection: This is incorrect. Bacterial infections usually lead to an increase in neutrophils, another type of white blood cell, rather than eosinophils.

4. Had an allergic reaction: Eosinophils are involved in the body's response to allergens. An elevated eosinophil count is often seen in allergic reactions, such as asthma or hay fever.

5. Had the flu: This is incorrect. The flu is caused by a viral infection, and it typically leads to an increase in lymphocytes, not eosinophils.

In summary, elevated eosinophil counts are most commonly associated with parasitic infections and allergic reactions.