Table 1.

Prevalence of intestinal parasites (%) in fecal samples from shelter dogs and cats by age group

Parasite	All Dogs (n = 1086) a	All Cats (n = 636) a	Dogs ≤ 1 yr (n = 546)	Cats ≤ 1 yr (n = 328)	Dogs >1 yr (n = 539)	Cats >1 yr (n = 306)
	Prevalence (95% CI)	Prevalence (95% CI)	Prevalence (95% CI)	Prevalence (95% CI)	Prevalence (95% CI)	Prevalence (95% CI)
Toxocara canis	12.7 (10.8-14.8)	n/a	20.9 (17.5-24.5)	n/a	4.5 (2.9-6.6)	n/a
Toxocara cati	n/a	16.5 (13.7-19.6)	n/a	23.5 (19.0-28.4)	n/a	8.8 (5.9-12.6)
Toxascaris leonina	3.0 (2.1-4.2)	n/a	4.6 (3.0-6.7)	n/a	1.5 (0.6-2.9)	n/a
Ancylostoma caninum	3.1 (2.2-4.3)	n/a	3.3 (2.0-5.2)	n/a	3.0 (1.7-4.8)	n/a
Uncinaria stenocephala	2.9 (2.0-4.1)	n/a	4.0 (2.5-6.0)	n/a	1.9 (0.9-3.4)	n/a
Ancylostoma tubaeforme	n/a	2.0 (1.1-3.5)	n/a	2.1 (0.9-4.3)	n/a	2.0 (0.7-4.2)
Taeniidb	1.6 (0.9-2.5)	4.4 (2.9-6.3)	1.1 (0.4-2.4)	2.7 (1.3-5.1)	2.0 (1.0-3.6)	5.9 (3.5-9.1)
Trichuris vulpis	4.4 (3.3-5.8)	n/a	4.2 (2.7-6.3)	n/a	4.6 (3.0-6.8)	n/a
Capillarid eggs	0.7 (0.3-1.4)	2.5 (1.4-4.1)	1.1 (0.4-2.4)	1.2 (0.3-3.1)	0.4 (0.0-1.3)	3.9 (2.0-6.7)
Cystoisospora	10.4 (8.7-12.4)	14.0 (11.4-16.9)	12.6 (10.0-15.7)	16.8 (12.9-21.3)	8.2 (6.0-10.8)	11.1 (7.8-15.2)
Giardia	3.5 (2.5-4.8)	1.4 (0.6-2.7)	5.5 (3.7-7.8)	2.1 (0.9-4.3)	1.5 (0.6-2.9)	0.7 (0.1-2.3)
Cryptosporidium	3.0 (2.1-4.2)	1.3 (0.5-2.5)	4.9 (3.3-7.1)	2.1 (0.9-4.3)	1.1 (0.4-2.4)	0.3 (0.0-1.8)
Sarcocystis	4.5 (3.4-5.9)	0.2 (0.0-0.9)	4.4 (2.8-6.5)	0.0 (0.0-1.1)	4.6 (3.0-6.8)	0.3 (0.0-1.8)
All parasitesa	33.9 (31.1-36.8)	31.8 (28.2-35.5)	43.8 (39.6-48.1)	39.0 (33.7-44.5)	23.9 (20.4-27.8)	23.9 (19.2-29.0)

^aAll parasites include many cases of multiple infections. ^btaeniid-type eggs are produced by Taenia and Echinococcus cestode species, and cannot be identified to genus level by morphology alone.

n/a: Species not an usual host or parasite not identified in the species.