Nematodes 2

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    Eggs of Strongyloides westeri, the intestinal threadworm of horses. The 3 larger eggs are those of Strongyles sp. X100
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    Eggs of Strongyloides westeri, these eggs are embryonated when laid. X400
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    Eggs of Strongyloides papillosus the "intestinal threadworm" of cattle, sheep, goats, and rabbits. X100
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    Eggs of Strongyloides papillosus, these eggs are embryonated when laid.
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    Eggs of Spirocerca lupi, the esophageal worm of dogs and foxes.
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    Eggs of Spirocerca lupi X400
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    Large Spirocerca nodules in the lumen of the esophagus. Adult worms are seen here in granulomous lesions.
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    Sarcoma in the esophagus due to Spirocerca sp.
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    Opened esophagus of a dog with 3 distinct nodules produced by Spriocerca sp.
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    • Spirocerca eggs: A. Low power
    •                         B. High power
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    Spirocerca lupi- eggs contain a fully formed larva. They are smallest embryonated ova seen in dog feces.
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    Egg and larvae of Parasonema plica. This is the parasite of the urinary bladder, but is commonly found in feces.
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    Parasonema plica eggs X400
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    Eggs of Dioctophyma renale, the giant worm of dogs, foxes, and occasionally man. These eggs are usually found in urinary sediment. They may be found in feces contaminated with urine.
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    Eggs of Dioctophyma renale. The shells are thick and rough. The color on a fecal exam is yellowish brown.
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    Eggs of Stephanurus dentatus, the kidney worm of swine. These eggs are found in the urinary sediment and occasionally in the feces.
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    Eggs of Stephanurus dentatus X400
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    Eggs of Physaloptera praeputialis, the stomach worm of cats, dogs, foxes and wild felidae.
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    Eggs of Physaloptera praeputialis X400
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    Physaloptera rara (stomach worm) looks like an ascarid except their eggs are smooth and contain an embryo when passed in the feces.
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    Eggs of Habronema muscae one of the gastric nematodes of horses. These eggs are elongated and embryonated when laid. X400
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    Eggs of Habronema muscae
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    Eggs of Draschia megastoma. These eggs are from the exudate in a gastric abscess, which contains adult worms.
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    Eggs of Draschia megastoma, will be seen as larvae in the feces.
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    Chronic gastritis in a horse with numerous ulcers associated with Trichostrongylus axei.
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    Inflammation and catarrhal (pus) in the stomach caused by Trichostrongylus axei.
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    Gasterophilus intestinalis in the white area of the stomach, and Gasterophilus nasalis in the duodenum.
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    Submandibular edema "bottle jaw" in the cow with parasitic gastritis.
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    Eggs from Haemonchus sp. the stomach worm of cattle, goats and sheep.
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    Eggs of Haemonchus contortus, the "common or twisted" stomach worm of cattle, sheep, goats.
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    Haemonchus sp worms on the mucosal surface. Notice the female worms resemble a barber pole.
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    Eggs of Ascarops strongylina another stomach worm of swine.
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    Large adult Strongyles attached to the mucosa of the ventral colon.
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    Several species of Strongyles sp. eggs. Forty species of this nematode have been reported form the large intestines of horse, asses, and mules in North America.
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    Two different Strongyles sp. eggs.
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    Eggs of Oxyuris equi the "rectal worm of horses". These eggs may be found in the feces, but examination of anal scraping is the more accurate method of diagnosis.
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    Eggs of Oxyuris equi, note the operculum at one end.
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    Eggs of Nematodirus spathiger (the largest egg) also called the "thread necked nematode" of cattle, sheep, and goats.
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    Eggs of Nematodirus spathiger notice the distinctive large cells inside the egg.
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    Eggs of Oesophagostomum sp. the nodular worm of swine.
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    Eggs of Oesophagostomum sp.
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    Eggs of Macracanthorhynchus hirudinaceus, the thorny headed worm of swine.
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    Eggs of Macracanthorhynchus hirudinaceus, notice the embryo is surrounded by three shells. The outer shell is dark brown.
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    Eggs of Macracanthorhynchus hirudinaceus Note this is actually a cestode not a nematode.
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    Dirofilaria immitis larvae (microfilaria). The first stage of Heartworm infection in dogs, foxes, coyotes, wolves and cats.
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    Dirofilaria immitis larvae in blood
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    Dirofilaria immitis larvae. The blood hemolyzed in 2% acetic acid (vinegar), this is why the larvae are almost straight.
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    Dirofilaria immitis larvae in hemolyzed blood.
Card Set
Nematodes 2
53-100 on Nematodes CD1
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