IL4 and Increased total eosinophil count: These investigators also showed that vitamin A-deficient mice had reduced numbers of B cells secreting parasite-specific IgG1 antibodies, reduced eosinophilia in the bone marrow, as well as more mesenteric lymph node cells secreting IFN-γ and significantly less secreting IL-4 and IL-5, consistent with a delay in expulsion of the enteric stage of the parasite (57).