Fig. 1From: The progression of heartworm associated respiratory disease (HARD) in SPF cats 18 months after Dirofilaria immitis infectionHeartworm antibody titers in serum of SPF cats infected with L3 D. immitis. Group A (selamectin at 28 days PI), Group B (ivermectin at 70 days PI), Group C (no treatment). Percent of cats serologically antibody positive after L3 D. immitis infection. Day 510 represents right ventricle sample immediately post-mortemBack to article page