Spring 2011 - Parasitology Final

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Amblyomma americanum (Lone Star Tick). Adult female (right) and adult male (left).

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Amblyomma sp. High magnification view of basis capitulum and mouth parts

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Dermacentor sp. (American Dog Tick). Adult male (right) and adult female (left).

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Dermacentor sp. High magnification view of basis capitulum and mouth parts

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Rhipicephalus sp. (Brown Dog Tick). Adult female (right) and adult male (left).

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Rhipicephalus sp. High magnification view of basis capitulum and mouth parts.

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Boophilus sp.. Adult female, ventral view.

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Ixodes sp..
High magnification view of anal groove on ventral surface.

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Adult soft tick (right) and adult hard tick (left).

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Adult soft tick.

Dorsal view

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Adult soft tick. Ventral view.

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Adult kissing bug (Family: Reduviidae, Genus: Triatoma).

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Gastrophilus sp. (Horse Bot). Adult fly

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3rd stage Bot fly larvae in the stomach of a horse

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High magnification view of horse bot 3rd stage larave.

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Gastrophilous nasalis (Horse Bot). High magnification view of 3rd stage larvae

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Hypoderma sp (Warbles or Cattle Grub). 3rd stage larvae recovered from lesion on back of the cow.

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Hypoderma sp. (Warbles or Cattle Grub). 3rd stage larvae in situ on interior of a cow hide.

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Cuterebra sp.. Large larvae recovered from the neck of a cat.

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Pneuonyssus caninum. Larva (note this specimen only has 6 legs) recovered from the nasal passage of a sneezing dog.

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Cheyletiella sp.(Walking Dandruff Mite) recovered from a cat.

Cats, dogs, and rabbits host different species of this mite.

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Cheyletiella sp.. High magnification view of anterior end of the mite.

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Cheyletiella sp. High magnification view of the palpal claw on the 1st pair of legs at the anterior end of the mite. Note, this feature is diagnostic for generic identification of the mite.

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Demodex sp. recovered from a dog.

Dogs, cats, cows, sheep, goats, horses, and humans host different species of this mite.

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Sarcoptes scabei var. canis (Canine Sarcoptic Mange Mite).

Cats, horses, sheep, pigs, rabbits, and humans host different varieties of this mite

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Sarcoptes scabei.

High magnification view.

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Psoroptes sp. (Psoroptic Mange Mite) recovered from the skin scraping of a cow.

Sheep, horses, rabbits, and goats host different species of this mite.

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Psoroptes sp. High magnification view of anterior end illustrating bell-like suckers at terminal end of long, jointed pediciles.

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Otodectes cynotis (Ear Mite) recovered from the ear swab of a cat.

Dogs, foxes, ferrets, and other carnivores may be infested with this mite.

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Chorioptes sp. (Chorioptic Mange Mite) recovered from a stanchioned dairy cow.

Sheep, horses, rabbits, and goats also host different species of this mite.

Note the occurrence of bell-like suckers on short, non-jointed pediciles.

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Chorioptes sp. (Chorioptic Mange Mite) recovered from a stanchioned dairy cow.

Sheep, horses, rabbits, and goats also host different species of this mite.

Note the occurrence of bell-like suckers on short, non-jointed pediciles.

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Hematopinus sp. (Sucking Louse).

Cattle, horses, and pigs host different species of this louse.

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Linognathus sp. (Sucking Louse).

Cattle, sheep, horses, and dogs host different species of this louse.

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Linognathus sp.. Higher magnification view.

Cattle, sheep, horses, and dogs host different species of this louse.

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Felicola subrostratus (Feline Chewing Louse).

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Trichodectes canis (Canine Chewing Louse).

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Damalina sp. (Bovine Chewing Louse).

Cattle, sheep, goats, and horses host different species of this mite.

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Giardia cyst

From zinc flotation of a dog 12 x 10 μm; yeast also present.

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Giardia trophozoite
stained - oil immersion.

From the fecal flotation of a mammal 12 - 15 x 10 μm

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Giardia cysts

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Giardia cysts

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Giardia trophozoite

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Giardia cysts

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Tritrichomonas foetus

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Trypanosoma cruzi

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Trypanosoma cruzi

amastigote in heart muscle of a dog - oil immers

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Leishmania

amastigotes in macrophage - oil immersion. Stained blood smear from a dog.

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Entamoeba histolytica/E. invadens


trophozoite - stained - oil immersion. (E. invadens is orphologically the same; E. invadens is in reptiles; E. histolytica in mammals) 15 - 60 μm

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Entamoeba histolytica/E. invadens

cyst - stained - oil immersion (E. invadens is morphologically the same; E. invadens is in reptiles; E. histolytica in mammals) 10 - 12 μm

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Balantidium coli

trophozoites - stained - high power. From direct smear of a pig or gorilla etc. 60 x 40 μm

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Toxoplasma gondii oocysts (T); Isospora felis oocysts (F);
Isospora rivolta oocysts (R); Sarcocystis sporocyst (C)

From the flotation of a cat T=10 μm, F=35 μm, R=20 μm, C=15 μm

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Balantidium coli

cysts - stained - high power.

From fecal flotation of a pig or gorilla 45 x 50 μm

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Babesia canis
trophozoites (merozoites) in RBC - oil immersion.

Stained blood smear of a dog 5 μm

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Babesia gibsoni.

Stained blood smear of a dog 3 μm

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Cytauxzoon

trophozoites (merozoites) in RBC - oil immersion.

Stained blood smear of a cat 1 - 2 μm

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Hepatozoon
gametocytes in neutrophil - oil immersion. Stained blood smear of dog

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Which organism/s produce infective stagesthat are immediately infective:

a. Isospora
b. Eimeria
c. Cryptosporidium
d. Sarcocystis
e. Toxoplasma
f. c & d

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f. c & d

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sarcocystis

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old Ancylostoma egg

Sarcocystis