Table 1 Dirofilaria immitis antigen percent positive test results (number positive/number tested) by region and state from dogs tested in the US from 2001 to 2007 [1], 2010 to 2012 [2], and 2013 to 2019

0.6% (1334/234,840)

0.6% (6016/1,043,798)

0.9% (449/51,497)

0.5% (905/191,348)

0.8% (54/7065)

0.7% (509/71,237)

0.3% (699/222,119)

0.5% (3235/639,514)

0.4% (1159/286,989)

0.4% (5169/1,215,646)

0.5% (2570/512,302)

0.6% (10,680/1,863,965)

0.4% (556/131,724)

0.6% (3268/559,139)

0.3% (1094/356,617)

0.4% (5056/1,205,338)

0.4% (2281/620,933)

0.4% (10,486/2,564,677)

0.2% (946/623,058)

0.4% (8818/2,334,505)

0.4% (274/67,811)

0.7% (1097/158,349)

0.4% (259/60,125)

0.7% (1429/217,697)

0.4% (11,675/3,175,080)

0.5% (56,668/12,065,213)

0.7% (4367/614,303)

1.0% (23,338/2,414,323)

1.4% (2834/207,125)

1.3% (13,158/980,336)

0.3% (401/125,196)

0.4% (2466/559,015)

1.0% (845/80,174)

0.9% (3150/361,642)

0.8% (4129/490,541)

0.7% (17,232/2,361,699)

0.3% (693/279,699)

0.4% (4406/1,097,589)

1.5% (2615/173,842)

1.6% (14,505/898,730)

0.7% (126/17,613)

0.5% (801/149,756)

0.1% (16/17,100)

0.3% (303/99,478)

0.6% (2717/448,847)

0.6% (11,706/2,107,379)

0.3% (45/13,831)

0.4% (277/79,978)

0.4% (1226/349,644)

0.4% (5940/1,331,056)

0.7% (20,014/2,817,915)

0.8% (97,282/12,440,981)

3.6% (4479/125,156)

3.9% (24,240/629,814)

4.6% (3402/74,386)

4.0% (17,793/442,206)

1.6% (11,189/696,358)

1.4% (41,922/3,058,920)

3.2% (10,142/317,138)

2.6% (39,669/1,550,488)

1.8% (1383/75,835)

1.4% (7069/518,778)

7.4% (7133/96,223)

7.2% (46,444/641,766)

10.5% (2835/26,988)

8.1% (21,499/265,613)

2.4% (8772/373,078)

2.2% (50,390/2,326,822)

3.4% (2657/79,056)

2.2% (9737/439,331)

2.9% (4640/160,252)

2.6% (23,949/906,389)

3.4% (6937/204,231)

2.6% (23,956/936,084)

3.9% (34,066/872,096)

3.5% (140,198/3,990,180)

1.0% (3827/384,074)

0.9% (17,702/2,038,858)

0.5% (388/77,319)

0.4% (1205/274,360)

2.9% (101,850/3,562,190)

2.6% (465,773/18,019,609)

2.3% (13/566)

1.4% (54/3,768)

0.6% (1005/156,152)

0.5% (3577/657,405)

0.8% (4850/649,681)

0.6% (15,265/2,446,653)

0.7% (1182/171,057)

0.9% (5961/690,515)

1.5% (240/16,548)

0.7% (816/124,893)

0.5% (68/14,253)

0.4% (210/48,509)

0.5% (23/4950)

0.7% (165/23,827)

0.5% (165/32,951)

0.6% (688/119,315)

1.5% (761/49,628)

1.4% (2077/149,284)

0.7% (344/51,964)

0.6% (1355/237,911)

0.7% (73/10,886)

0.5% (248/50,016)

0.9% (136/16,026)

0.6% (986/157,038)

0.6% (27/4285)

1.1% (222/19,882)

0.8% (8887/1,178,947)

0.7% (31,624/4,729,016)

1.3% (142,426/10,734,132)

1.4% (651,347/47,254,819)