Nema

• roundworm

  Toxocara canis/cati
• arrowheaded worm

  Toxascaris leonina
• large roundworm of pigs

  Ascaris suum
• threadworms

  Strongyloides spp.
• hookworm

  Ancylostoma spp.
• large strongyles

  Stongylus vulgaris
• barberpole worm

  Haemonchus contortus
• whipworm

  Trichuris spp.
• horse pinworm

  Oxyuris equi
• heartworm

  Dirofilaria immitis
• brown stomach worm

  Ostertagia ostertagi
• nodular worm

  Oesophagostomum spp.
• cat lungworm

  Aelurostrongylus abstrusus
• dog lungworm

  Filaroides hirthi
• trichina worm

  Trichinella spiralis
• large roundworm of horses

  Parascaris equorum
• lungworms

  Metastrongylus spp.
• meningeal worm

  Parephostrongylus tenuis
• definitive host/pp for Toxocara canis/cati

  dogs and cats

  6 weeks
• definitive host for Toxascaris leonina

  dogs and cats
• definitive host for Ascaris suum

  pigs
• definitive host for Strongyloides

  dogs, cats, primates, humans, etc.
• definitive host for Ancylostoma

  dogs, cats, and humans
• definitive host for Strongylus vulgaris

  horses
• definitive host for Haemonchus contortus

  sheep
• which 7 parasites have a intermediate host

  Toxocara canis/cati

  Toxascaris leonina

  Dirofilaria immitis

  Aelurostrongylus abstrusus

  Pearsonema spp.

  Metastrongylus spp.

  Parephostrongylus tenuis
• int. host for roundworm

  paratenic; possibly rodent
• int. host for arrowheaded worm

  possibly mice
• int. host for cat lungworm

  snails and slugs

  paratenic - rodents and birds
• int. host for Pearsonema

  earthworms
• int. host for lungworms

  earthworms
• int. host for meningeal worm

  snails and slugs
• Pathogenesis for Toxocara

  • vomiting or defecating worms
  • pot belly
  • colic
  • intestinal obstruction or rupture
• pathogenesis for Toxascaris

  • unthriftiness
  • pot belly
  • failure to grow
• pathogenesis for Ascaris

  • tissue destruction
  • "milk spots" on the liver
  • "thumps"
  • hemorrhage in lungs, edema
• pathogenesis for Strongyloides

  • severe in young and immunosuppressed
  • chronic, asymptomatic cases
  • invasive, pulmonary, intestinal
• pathogenesis for Ancylostoma

  • anemia
  • puppy pneumonia
  • dermatitis
  • bloody, mucoid diarrhea
• pathogenesis for Stongylus vulgaris

  • colic
  • ulceration of gut wall
  • thrombi and emboli formation
  • necrosis
  • fibrosis of arteries
• pathogenesis of Haemonchus

  • bottle jaw caused by edema
  • anemia (lambs)
  • high egg counts
• how is Toxocara canis/cati transmitted and what is the infection site?


  through ingestion of infected feces

  through ingestion of paratenic host

  bitchs to pups

  small intestine