While other potent eosinophil chemoattractants, such as PGD2 [19, 20] and oxo-ETE [21], have also been characterized, many factors reinforce the current understanding of eotaxin as a specialized chemoattractant which acts primarily on granulocyte subtypes relevant to allergy and worm infections [2–4]. This evidence concerns the gene CCL11 and helminthiasis.