Table 2.
Prevalence of different endoparasites among dogs (n = 4692) in the US
| Parasite infection | Positives (n) | Prevalence % (95% CI) |
|---|---|---|
| Helminths | ||
| Nematodes | ||
| Ancylostomatidaea | 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) |
aOriginal results reported as 263 samples positives for Ancylostoma sp. and 1 sample positive for Uncinaria stenocephala