Monarch Disease Ontology entry MONDO_0005118 (human granulocytic anaplasmosis) is a tick-borne, infectious disease caused by Anaplasma phagocytophilum, an obligate intracellular bacterium that is typically transmitted to humans by ticks of the Ixodes ricinus species complex. Also known as: HGA, anaplasma caused disease or disorder, anaplasmoses, anaplasmosis, human anaplasmosis, human anaplasmosis caused by Anaplasma phagocytophilum, infection by Anaplasma phagocytophilum.