K-9/Feline helminth/protozoa identification

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Hookworms Eggs:
Ancyclostoma caninum
Ancyclostoma tubaeforme
Ancyclostoma braziliense
Uncinaria stenocephala

60-80 x 40 μm

Ascarid Eggs
Toxacara canis
Toxacara cati

85-90 x 75 μm

Toxascaris leonina

Spirocerca lupi

30-35 μm

Pysaloptera spp

45 μm in length

Strongyloides stercoralis

Dx is by eggs w/L₁ and L₁ in fecal float or Baermann technique from fresh feces

Trichuris vulpis

80-35 μm

Capillaria spp

60 x 35 μm

Dioctophme renale

70 μm in urine

Oslerus osleri

Dx is L₁ in feces or sputum
kinked tail but no accessory spine

Aeulrostrongylus abstrusus

Dx is L₁ in a fecal smear or recovered by Baermann technique
note characteristic S-shaped tail

Dirofilaria immitis
Acanthocheilonema (Dipetalonema) reconditum

300 μm in blood smear
both ends tapered
distinguish D. recondium by progressive movement and blunt head

Dipylidium caninum

Egg packets are 230-170 μm and contin 10-20 eggs
Eggs are 35-40 μm each

Taenia type eggs
Echinococcus granulosus
Echinococcus multilocularis
Taenia crassiceps
Taenia Taeniaeformis

25-40 μm

Diphyllobothrium latum
Spirometra spp

60 μm

Alaria spp

80 μm

Paragonimus kellicotti

110 μm

Platynosomum fastosum

fluke egg that is up to 50 μm

Coccidia

50 μm

Giardia intestinalis

12 μm

Sarcocystis spp

18 μm
sporocysts in feces

Hepatozoon spp

leukocytes in dog's blood contain gamonts

Toxoplasma gondii

12 μm in cat feces

Babesia canis

Theileria (Cytauxzoon) spp

1-2 μm in RBCs

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