Fig. 2From: Investigating management choices for canine heartworm disease in northern MississippiPrevention history for heartworm-positive patients. Columns represent different levels of heartworm prevention consistency determined by analyzing purchase history 2 years prior to heartworm antigen-positive test. The shaded region (a) in the first column denotes the proportion of cases that was not found to have purchase gaps >45 days after WOI analysis (5.0%)Back to article page