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
| State | 2001–2007 [1] | 2010–2012 [2] | 2013–2019 |
|---|---|---|---|
| Northeast | |||
| Connecticut | 0.6% (236/37,650) | 0.6% (1334/234,840) | 0.6% (6016/1,043,798) |
| Delaware | 1.6% (79/4986) | 0.9% (449/51,497) | 0.5% (905/191,348) |
| District of Columbia | NR | 0.8% (54/7065) | 0.7% (509/71,237) |
| Maine | 0.6% (173/27,247) | 0.3% (699/222,119) | 0.5% (3235/639,514) |
| Maryland | 0.8% (221.28,770) | 0.4% (1159/286,989) | 0.4% (5169/1,215,646) |
| Massachusetts | 0.7% (1657/252,281) | 0.5% (2570/512,302) | 0.6% (10,680/1,863,965) |
| New Hampshire | 0.8% (168/21,056) | 0.4% (556/131,724) | 0.6% (3268/559,139) |
| New Jersey | 0.3% (384/111,245) | 0.3% (1094/356,617) | 0.4% (5056/1,205,338) |
| New York | 0.5% (780/158,926) | 0.4% (2281/620,933) | 0.4% (10,486/2,564,677) |
| Pennsylvania | 0.4% (191/45,815) | 0.2% (946/623,058) | 0.4% (8818/2,334,505) |
| Rhode Island | 0.8% (123/16,199) | 0.4% (274/67,811) | 0.7% (1097/158,349) |
| Vermont | 0.7% (24/3682) | 0.4% (259/60,125) | 0.7% (1429/217,697) |
| Region | 0.6% (4036/707,857) | 0.4% (11,675/3,175,080) | 0.5% (56,668/12,065,213) |
| Midwest | |||
| Illinois | 0.9% (2915/337,434) | 0.7% (4367/614,303) | 1.0% (23,338/2,414,323) |
| Indiana | 1.8% (428/24,290) | 1.4% (2834/207,125) | 1.3% (13,158/980,336) |
| Iowa | 0.9% (164/19,097) | 0.3% (401/125,196) | 0.4% (2466/559,015) |
| Kansas | 2.7% (170/6264) | 1.0% (845/80,174) | 0.9% (3150/361,642) |
| Michigan | 0.7% (2031/292,171) | 0.8% (4129/490,541) | 0.7% (17,232/2,361,699) |
| Minnesota | 0.4% (332/80,810) | 0.3% (693/279,699) | 0.4% (4406/1,097,589) |
| Missouri | 2.0% (457/22,673) | 1.5% (2615/173,842) | 1.6% (14,505/898,730) |
| Nebraska | 0.8% (34/4387) | 0.7% (126/17,613) | 0.5% (801/149,756) |
| North Dakota | 0.5% (25/4914) | 0.1% (16/17,100) | 0.3% (303/99,478) |
| Ohio | 0.9% (1242/136,548) | 0.6% (2717/448,847) | 0.6% (11,706/2,107,379) |
| South Dakota | 0.1% (1/962) | 0.3% (45/13,831) | 0.4% (277/79,978) |
| Wisconsin | 0.6% (616/109,745) | 0.4% (1226/349,644) | 0.4% (5940/1,331,056) |
| Region | 0.8% (8415/1,039,295) | 0.7% (20,014/2,817,915) | 0.8% (97,282/12,440,981) |
| Southeast | |||
| Alabama | 3.4% (622/18,388) | 3.6% (4479/125,156) | 3.9% (24,240/629,814) |
| Arkansas | 6.8% (578/8526) | 4.6% (3402/74,386) | 4.0% (17,793/442,206) |
| Florida | 1.8% (1408/80,280) | 1.6% (11,189/696,358) | 1.4% (41,922/3,058,920) |
| Georgia | 2.7% (1373/51,494) | 3.2% (10,142/317,138) | 2.6% (39,669/1,550,488) |
| Kentucky | 1.1% (227/20,092) | 1.8% (1383/75,835) | 1.4% (7069/518,778) |
| Louisiana | 6.0% (871/14,468) | 7.4% (7133/96,223) | 7.2% (46,444/641,766) |
| Mississippi | 7.4% (183/2459) | 10.5% (2835/26,988) | 8.1% (21,499/265,613) |
| North Carolina | 3.0% (663/22,005) | 2.4% (8772/373,078) | 2.2% (50,390/2,326,822) |
| Oklahoma | 2.1% (254/11,913) | 3.4% (2657/79,056) | 2.2% (9737/439,331) |
| South Carolina | 5.7% (860/15,019) | 2.9% (4640/160,252) | 2.6% (23,949/906,389) |
| Tennessee | 3.6% (498/13,787) | 3.4% (6937/204,231) | 2.6% (23,956/936,084) |
| Texas | 5.5% (12,160/220,829) | 3.9% (34,066/872,096) | 3.5% (140,198/3,990,180) |
| Virginia | 1.1% (331/29,766) | 1.0% (3827/384,074) | 0.9% (17,702/2,038,858) |
| West Virginia | 0.8% (51/6131) | 0.5% (388/77,319) | 0.4% (1205/274,360) |
| Region | 3.9% (20,079/515,157) | 2.9% (101,850/3,562,190) | 2.6% (465,773/18,019,609) |
| West | |||
| Alaska | NR | 2.3% (13/566) | 1.4% (54/3,768) |
| Arizona | 1.2% (620/53,809) | 0.6% (1005/156,152) | 0.5% (3577/657,405) |
| California | 1.6% (8478/530,788) | 0.8% (4850/649,681) | 0.6% (15,265/2,446,653) |
| Colorado | 0.4% (1028/261,358) | 0.7% (1182/171,057) | 0.9% (5961/690,515) |
| Hawaii | NR | 1.5% (240/16,548) | 0.7% (816/124,893) |
| Idaho | 0.6% (32/5748) | 0.5% (68/14,253) | 0.4% (210/48,509) |
| Montana | 0.6% (16/2801) | 0.5% (23/4950) | 0.7% (165/23,827) |
| Nevada | 1.2% (74/6180) | 0.5% (165/32,951) | 0.6% (688/119,315) |
| New Mexico | 1.8% (427/23,429) | 1.5% (761/49,628) | 1.4% (2077/149,284) |
| Oregon | 0.8% (235/29,176) | 0.7% (344/51,964) | 0.6% (1355/237,911) |
| Utah | 0.6% (11/1,904) | 0.7% (73/10,886) | 0.5% (248/50,016) |
| Washington | 1.0% (39/4,099) | 0.9% (136/16,026) | 0.6% (986/157,038) |
| Wyoming | 1.2% (10/700) | 0.6% (27/4285) | 1.1% (222/19,882) |
| Region | 1.2% (10,970/919,992) | 0.8% (8887/1,178,947) | 0.7% (31,624/4,729,016) |
| Overall | 1.4% (43,500/3,182,301) | 1.3% (142,426/10,734,132) | 1.4% (651,347/47,254,819) |