Which leukocyte releases antihistamine molecules and is especially active against parasitic worms?

1. Eosinophils stain with the acidic dye eosin and carry reddish-orange granules. 2. Their granules include antihistamine molecules, which counteract the histamines produced by basophils and mast cells. 3. Other eosinophil granules contain molecules toxic to parasitic worms. 4. Basophils release histamine rather than antihistamine, so they sit on the opposite side of that pairing and are the main trap. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 18 "The Cardiovascular System: Blood", section 18.4 Leukocytes and Platelets_