Anoplocephala spp.

(aka., Ileocecal-valve Tapeworm)
Method of Detection:
  • Fecal float (simple or centrifugal)
​
Size:
  • Egg: 65–80 μm diameter

Anoplocephala magna and Paranoplocephala mamillana

(aka., Equine Tapeworm and Dwarf Equine Tapeworm, respectively)
Method of Detection:
  • Fecal float (simple or centrifugal)
​
Size:
  • Egg: 50–60 μm diameter

Dicrocoelium dendriticum

(aka., Small Lanceolate Fluke, Common Lancet Fluke, Small Liver Fluke, Dicrocoelium lanceatum)
Method of Detection:
  • Fecal sediment
​
Size:
  • Egg: 38–45 × 22–30 μm

Dictyocaulus arnfieldi

(aka., Equine Lungworm)
Method of Detection:
  • Fecal float (simple or centrifugal) for eggs
  • ​Baermann (fresh feces) for larvae
​
Size:
  • Egg: 74–96 × 46–58 μm
  • First-stage larva: 420–480 μm

Eimeria leuckarti

(aka., Coccidia, Globidium leuckarti)
Method of Detection:
  • Fecal sediment >>> Fecal Float
​
Size:
  • Oocyst: 80–88 × 55–59 μm

Fasciola hepatica

(aka., Liver Fluke)
Method of Detection:
  • Fecal sediment
​
Size:
  • Egg: 130–150 × 63–90 μm

Giardia sp.

(aka., Giardia duodenalis, Giardia intestinalis, Lamblia lamblia)
Method of Detection:
  • Fecal float for cysts (centrifugal in ZnSO4) (± Lugol's iodine)
  • ​Saline fecal smear of fresh feces for trophozoite (± Lugol's iodine)
​
Size:
  • Cyst: 8–13 × 7–10 μm
  • Trophozoite: 12–17 × 5–10 μm

Habronema spp. and Draschia megastoma

(aka., Stomach Worm of Horse)
Method of Detection:
  • Fecal sediment
​
Size:
  • Egg: 40–59 × 10–16 μm

Oxyuris equi

(aka., Equine Pinworm)
Method of Detection:
  • Acetate tape cytology of perianal skin
​
Size:
  • Egg: 85–95 × 40–45 μm

Parascaris equorum

(aka., Equine Roundworm, Ascaris equorum, Ascaris megacephala)
Method of Detection:
  • Fecal float (simple or centrifugal)
​
Size:
  • Egg: 90–100 μm diameter

'Strongyle' Type Ova

(aka., Large strongyles [ex., Strongylus spp.], Small strongyles [ex., cyathostomes], and Trichostrongylus axei)
Method of Detection:
  • Fecal float (simple or centrifugal)
​
Size:
  • Egg: 60–120 × 35–60 μm

Strongyloides westeri

(aka., Threadworm)
Method of Detection:
  • Fecal float (simple or centrifugal)
​
Size:
  • Egg: 40–52 × 32–40 μm
Sources Cited:
  1. Zajac, Anne M., and Gary A. Conboy. Veterinary Clinical Parasitology. 8th ed. West Sussex: John Wiley & Sons, 2012. Print.
  2. Taylor, Mike A., R. L. Coop, and Richard L. Wall. Veterinary Parasitology. 4th ed. Chichester, West Sussex: Wiley Blackwell, 2016. Print.
  3. American Association of Veterinary Parasitologists. (2010). Retrieved 2019, from https://www.aavp.org.

© Lance Wheeler, 2018–2019