Advances in Parasitology, Volume 111, the latest release in this ongoing series, includes medical studies of parasites of major influence, along with reviews of more traditional areas, such as zoology, taxonomy and life history. Chapters in this update include Taking the strain out of onchocerciasis: a reanalysis of blindness and transmission data does not support the existence of a savanna blinding strain of onchocerciasis in West Africa, Enterocytozoon bieneusi of animals, Taenia solium taeniasis/cysticercosis, Genomic analysis reveals predominant clonality and progressive evolution at all evolutionary scales in eukaryotic pathogens, HTLV-I and Strongyloides: the worm lurking beneath, and more.