Table 3 Radiographic scores and heartworm antigen and antibody results
Radiographic score | Radiographic score definitiona | Criteria | Number of cats, % (n = 50) | Cats Ag+ or Ab+ on one or more tests, % |
|---|---|---|---|---|
3 | Strongly indicative of FHD | Caudal lobar artery enlargement with or without pulmonary or other abnormalities | 1/50 (2%) | 0/1 (0%) |
2 | Moderately indicative of FHD | Caudal lobar artery enlargement with or without pulmonary or other abnormalities | 4/50 (8%) | 4/4 (100%) |
1 | Mildly indicative of FHD | Caudal lobar artery enlargement with or without pulmonary or other abnormalities | 8/50 (16%) | 5/8 (63%) |
0.5 | Consistent with but not specific for FHD | Increased broncho-interstitial opacity only | 25/50 (50%) | 6/25 (24%) |
0 | No radiographic sign of FHD | 12/50 (24%) | 4/12 (33%) |