Final answer:
Isotype switch enables eosinophils, basophils, and mast cells to be recruited to the adaptive immune response in parasite infections.
Step-by-step explanation:
In parasite infections, isotype switch enables eosinophils, basophils, and mast cells to be recruited to the adaptive immune response. Isotype switching is a process by which plasma cells, which are differentiated B cells, switch their production of antibodies from IgM to other classes such as IgG, IgA, or IgE.
These different classes of antibodies play specific roles in the immune response against parasites. For example, IgE is involved in the allergic response and can label parasites, allowing eosinophils to bind to them via their Fc receptors.
Overall, isotype switching is a critical mechanism that enhances the effectiveness of the immune response against parasites and involves the production of different antibody classes that recruit eosinophils, basophils, and mast cells.