Table 2 Prevalence of different endoparasites among dogs (n = 4692) in the US

Helminths

 Nematodes

  Ancylostomatidae^a

264

5.63 (4.97–6.29)

  Toxocara canis

117

2.49 (2.05–2.94)

  Trichuris vulpis

114

2.43 (1.99–2.87)

  Eucoleus boehmi

14

0.30 (0.14–0.45)

  Strongyloides stercoralis

8

0.17 (0.05–0.29)

  Toxascaris leonina

4

0.09 (0–0.17)

  Eucoleus aerophilus

2

0.04 (0–0.10)

  Physaloptera sp.

2

0.04 (0–0.10)

  Crenosoma

1

0.02 (0–0.06)

  Pearsonema sp.

1

0.02 (0–0.06)

 Cestodes

  Dipylidium caninum

12

0.26 (0.11–0.4)

  Taeniidae

7

0.15 (0.04–0.26)

  Spirometra sp.

2

0.04 (0–0.1)

 Trematodes

  Alaria sp.

1

0.02 (0–0.06)

  Heterobilharzia americana

1

0.02 (0–0.06)

  Nanophyetus salmincola

1

0.02 (0–0.06)

  Paragonimus kellicotti

1

0.02 (0–0.06)

Protozoans

 Flagellates

  Giardia sp.

391

8.33 (7.54–9.12)

 Coccidians

  Cystoisospora ohioensis-complex

104

2.22 (1.80–2.64)

  Cystoisospora sp.

55

1.17 (0.86–1.48)

  Cystoisospora canis

45

0.96 (0.68–1.24)

  Sarcocystis sp.

16

0.34 (0.17–0.51)

  Cryptosporidium sp.

13

0.28 (0.13–0.43)

  Neospora caninum/Hammondia

3

0.06 (0–0.14)