Human Anaplasmosis is caused by a strain of Anaplasma phagocytophilum (ha strain) that is transmitted by deer ticks. Roughly 3-12% of nymphal deer ticks in Wisconsin are infected with this pathogen. The maps and graphs are from the Wisconsin Department of Health Services. See their webpage for more information. https://www.dhs.wisconsin.gov/tick/anaplasmosis-data.htm