Harold Benjamin Fantham (1876–1937) was a distinguished parasitologist who made substantial contributions to the understanding of animal parasites that affect humans. Educated at the University of Manchester and obtaining his D.Sc. from the University of London, Fantham became a prominent figure in the study of tropical medicine and parasitology. His work was particularly focused on the life cycles, pathology, and epidemiology of parasitic organisms. Notably, Fantham authored „The Animal Parasites of Man”, a comprehensive text considered seminal in the field of human parasitology, addressing both protozoan and metazoan parasites. This scholarly work provided invaluable insights for clinicians and researchers and was influential in advancing treatments and preventive measures against parasitic diseases. Through his rigorous research and detailed writings, Fantham”s legacy continues to underscore the importance of understanding parasitic relationships in the context of human health. His literary style was methodical and precise, delineating complex biological processes in formats that were both accessible to practitioners and instructive for academic inquiry. Fantham”s contributions extend beyond his publications, as he was active in various scientific communities, fostering knowledge exchange and inspiring future generations of parasitologists.