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Oesphagostomum columbianum
"Nodular worm" in sheep and goats
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Oesphagostomum columbianum and Oesphagostomum radiatum will cause inflammation
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Chabertia ovina
"Large-mouthed bowel worm" of sheep and ruminants
Direct life cycle, soft feces and may be streaked with blood
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Ancylostoma caninum
Passed in the feces and infective larvae develop in moist soil and ingested
Dog
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Ancylostoma caninum
Hemorrhagic foci in intestinal mucosa of a Coonhound
Dog
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Ancylostoma caninum attached to a canine intestine
Histological
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Haemonchus contortus worms in a sheeps abomasum
"Twisted stomach worm" of sheep, cattle, goats and other ruminants
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Ostertagia ostertagia
"Brown stomach worm" of ruminants
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Ostertagia ostertagia
"Brown stomach worm" of ruminants
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Cooperioides hepaticae
Small reddish worms found in small intestines and liver of ruminants
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Trichostrongylus spp.
35 species, 2 from birds and the rest from domestic species
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Trichostrongylus
Severe diarrhea in a sheep
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Hyostrongylus rubidus
"Red stomach worm" of swine
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Dictyocaulus viviparous
Lungworm of cattle, moose, elk, bison, deer, pigs and other large mammals
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Dictyocaulus viviparous
Lungworms of cattle, moose, elk, bison, deer, and pigs
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Pnemostrongylus sp.
Lungworms of carnivores, rodents, primates and swine
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Metastrongylus worms surrounded by fibrotic tissue
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Protostrongylus verminous pneumonia in lungs of sheep
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Angiostrongylus cantonesis
Common parasite of the pulmonary arteries of rats
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Toxocara canis in opened dog bowel
Dog
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Toxocara canis adults emerging from a puppy bowel movement
Dog
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Toxascaris leonina (Right) and Toxocara canis (Left)
Dog
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Ascaris lumbricoides
Largest nematode of the human intestines and most prevalent parasite in the world
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