This document discusses multiple immune responses against parasites. It describes avoidance behaviors, grooming, antibody production, eosinophils, granuloma formation, and pustule development as cattle responses to ticks. It also discusses refractory and susceptible immune responses to different parasites in various hosts. The roles of antibody, complement, phagocytosis, hypersensitivity, mast cells, eosinophils, macrophages, and cytotoxic T cells are described in combating different types of parasites including trypanosomes, nematodes, schistosomes, theileria, and leishmania. The document also notes how trypanosomes can evade the immune response through antigenic variation.