Abstract: An immunotoxin for use in the treatment of leishmaniasis A wherein the immunotoxin comprises a portion which is specifically binding to the cellular surface receptor CD64 as a component A and a cell killing portion as a component B, wherein the cell killing portion alters the function, gene expression, or viability of a cell thereby killing Leishmania-infected macrophages and by this eliminates Leishmania.

Abstract: A polypeptide having a binding affinity to CD64 of at least 10?9 M for use in a treatment of a disease associated with an inflammation in combination with an anti-TNF-?, antibody.

Abstract: An immunomodulatory fusion protein (IFP) for converting pro-inflammatory M macrophages to anti-inflammatory M2 like phenotypes of macrophagesthe IFP having at least one component A and at least one component B wherein the component A is comprising or consisting of a binding domain for extra-cellular surface structures of a macrophage that internalizes said immunomodulatory fusion protein upon binding of component A of said immunomodulatory fusion protein, and the component B is modulating the macrophage and comprises or consists of a DNA oligonucleotide or RNA oligonucleotide or a chemical small molecule exhibiting modulatory functions to targeted macrophages or a polypeptide which amino acid sequence comprises or consists of a macrophage modulatory protein or comprises or consists of at least a partial sequence of the macrophage modulatory protein, the partial sequence having maintained the modulatory function of the macrophage modulatory protein.