Table 1 Summary of incidence of positive heartworm antigen test results and the relative change in incidence 2013 to 2016
State/Region | 2013 | 2016 | Relative change in incidence 2016 vs 2013 (%) | ||||
|---|---|---|---|---|---|---|---|
No. of tests conducted | No. of positive results | Incidence (%) | No. of tests conducted | No. of positive results | Incidence (%) | ||
United States | 6,980,504 | 77,557 | 1.11 | 9,266,427 | 118,689 | 1.28 | 15.28 |
Alabama | 84,958 | 2481 | 2.92 | 114,531 | 4428 | 3.87 | 32.39 |
Arkansas | 36,283 | 1259 | 3.47 | 55,482 | 2405 | 4.33 | 24.92 |
Florida | 594,004 | 7979 | 1.34 | 712,653 | 9048 | 1.27 | -5.48 |
Georgia | 241,678 | 5348 | 2.21 | 317,229 | 7842 | 2.47 | 11.71 |
Louisiana | 61,321 | 3782 | 6.17 | 103,667 | 7242 | 6.99 | 13.27 |
Mississippi | 16,017 | 1340 | 8.37 | 38,579 | 2905 | 7.53 | -9.99 |
Missouri | 145,571 | 1437 | 0.99 | 168,206 | 2549 | 1.52 | 53.51 |
North Carolina | 324,493 | 6555 | 2.02 | 441,015 | 9386 | 2.13 | 5.36 |
Oklahoma | 44,351 | 831 | 1.87 | 60,327 | 1363 | 2.26 | 20.58 |
South Carolina | 136,549 | 3099 | 2.27 | 176,438 | 4550 | 2.58 | 13.63 |
Tennessee | 140,553 | 3423 | 2.44 | 173,571 | 5326 | 3.07 | 26.00 |
Texas | 525,667 | 14,322 | 2.72 | 735,395 | 23,489 | 3.19 | 17.23 |
Southeastern USA | 2,351,445 | 51,856 | 2.21 | 3,097,093 | 80,533 | 2.60 | 17.91 |
Rest of USA | 4,629,059 | 25,701 | 0.56 | 6,169,334 | 38,156 | 0.62 | 11.40 |