Table 1 Percent positive test results (number positive/number tested) by region for dogs tested from 2010 – 2012 in the United States for antigen of Dirofliaria immitis and antibody to Borrelia burgdorferi , Ehrlichia spp., and Anaplasma spp.

Northeast

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

13.3% (373,212/2,806,273)

0.9% (24,011/2,806,112)

7.1% (189,486/2,652,801)

Midwest

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

4.4% (76,025/1,720,510)

1.0% (17,337/1,720,168)

3.9% (59,580/1,548,686)

Southeast

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

2.5% (51,232/2,058,574)

3.2% (65,191/2.057,984)

0.9% (14,046/1,631,332)

West

0.8% (8,887/1,178,947)

1.4% (5,726/410,840)

1.3% (5,134/410,419)

2.0% (7,056/359,449)

Overall mean

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

7.2% (509,195/6,996,197)

1.6% (111,673/6,994,683)

4.4% (270,168/6,192,268)