Trichostrongyloidea - pigs

Question 1

What are some general characteristics of Hyostrongylus rubidus?

Answer 1

• Typical trichostrongylid LC
• Direct, L3 is infective, EL4 possible, PPP ~21 days
• Chronic gastritis
• outdoor pigs only
• Nodules in gastric mucosa (similar to Ostertagia)

Question 2

Is Hyostrongylus a disease of young, old pigs, or both?

Answer 2

• Both?
• Predominently a dz of pigs with access to pasture or those kept in straw yards.
• More common in breeding stock, particularly gilts (young females - before or after 1 litter) and lactating sows.
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Question 3

What is the pathogenesis of Hyostrongylus rubidus?

What are the clinical signs of Hyostrongylus rubidus?

How is diagnosis made?

Answer 3

• Path is similar to Ostertagiosis - replacement/loss of parietal cells, increased pH, sometimes ulceration and hemorrhage
• inappetence
• anemia
• loss of condition
• reduced fertility
• dx by FEC