Fig. 3

Heartworms in Group C cat after L3 D. immitis infection. The right ventricle is opened along the ventricular septum and reflected back. Two viable heartworms were noted in the right ventricle and extending into the pulmonary artery. The surface of the lungs was uneven and discolored. The valve leaflets were unaffected. The cat was heartworm antigen and antibody positive