are neutral white blood cells
that perform a useful function for the immune system. This primarily consists of destroying parasites
that attack the body
by binding to them and liberating an enzyme, histamine. The quantity of these granulocytes increases in these cases, which is called eosinophilia
. This process is observed in skin or inflammatory diseases, and allergic reactions
as well as asthma
and urticaria, along with some types of cancer
. For this reason, scientists are currently studying the effects of eosinophil granulocyte transfusion as a treatment method.