Fig. 2From: Evaluation of feline heartworm disease based on gross necropsy, serology, pulmonary histopathology, and radiographic evidence in adult shelter cats in northeastern AlabamaArteriole wall area. The red line marks the median arteriole wall percentage in control cats from the HARD Study. The orange line represents the median arteriole wall percentage in cats with abbreviated heartworm infections. The blue line marks cats with over 75% wall-to-lumen ratio, seven of which were heartworm antigen-positiveBack to article page