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Table 1 Differential features of eggs of Trichuris vulpis , Capillaria aerophila and Capillaria boehmi

From: Mixed trichuroid infestation in a dog from Italy

Nematode

Length μm

Width μm

Morphological features

Plugs

Shell

Reference

Trichuris vulpis

72-94

31-42

lemon-like shape, brownish

symmetrical presence of rings

thick and smooth wall

[1, 5]

Capillaria aerophila

60-65

25-40

barrel-like shape, zygote fills the egg

asymmetrical no rings

striated outer shell with a network of anastomosis ridges and bridges

[4, 5]

Capillaria boehmi

50-60

30-35

barrel-like shape, clear to golden, space between the embryo and the wall

asymmetrical no rings

tiny pits on the surface of the wall

[4, 10]