Parasitology lab: Nematodes 2: Slides 76-100

Oesphagostomum columbianum 

"Nodular worm" in sheep and goats

Oesphagostomum columbianum and Oesphagostomum radiatum will cause inflammation

Chabertia ovina 

"Large-mouthed bowel worm" of sheep and ruminants

Direct life cycle, soft feces and may be streaked with blood

Ancylostoma caninum 

Passed in the feces and infective larvae develop in moist soil and ingested

Dog

Ancylostoma caninum 

Hemorrhagic foci in intestinal mucosa of a Coonhound

Dog

Ancylostoma caninum attached to a canine intestine

Histological

Haemonchus contortus worms in a sheeps abomasum 

"Twisted stomach worm" of sheep, cattle, goats and other ruminants

Ostertagia ostertagia 

"Brown stomach worm" of ruminants

Ostertagia ostertagia 

"Brown stomach worm" of ruminants

Cooperioides hepaticae

Small reddish worms found in small intestines and liver of ruminants

Trichostrongylus spp.

35 species, 2 from birds and the rest from domestic species

Trichostrongylus 

Severe diarrhea in a sheep

Hyostrongylus rubidus

"Red stomach worm" of swine

Dictyocaulus viviparous 

Lungworm of cattle, moose, elk, bison, deer, pigs and other large mammals

Dictyocaulus viviparous 

Lungworms of cattle, moose, elk, bison, deer, and pigs

Pnemostrongylus sp. 

Lungworms of carnivores, rodents, primates and swine

Infected lung

Cystocaulus infection

Metastrongylus worms surrounded by fibrotic tissue

Protostrongylus verminous pneumonia in lungs of sheep

Angiostrongylus cantonesis 

Common parasite of the pulmonary arteries of rats

Toxocara canis in opened dog bowel

Dog

Toxocara canis adults emerging from a puppy bowel movement

Dog

Toxascaris leonina (Right) and Toxocara canis (Left)

Dog

Ascaris lumbricoides

Largest nematode of the human intestines and most prevalent parasite in the world