Hyostrongylus rubidus (1)

Question 1

What is the host?

Answer 1

Swine

Question 2

Describe adults

Answer 2

Slender reddish nematode

5-8 mm long

Question 3

Describe eggs

Answer 3

Oval

Thin shelled

Average sized

Question 4

Explain the life cycle

Answer 4

Eggs to L3: 1-2 weeks

L4: hypobiotic

High motility in L3

PPP: 3 weeks

Question 5

What is the site of infection?

Answer 5

Stomach

Question 6

Describe the Pathogenesis

Answer 6

Development of L3 to immature adults in the gastric glands of stomach

 - Lower acidity
 - Mucosal hyperplasia
 - Nodule formation
 - Hemorrhage

Question 7

Describe the clinical signs

Answer 7

Inappetance - lower appetite

Loss of condition

Anemia

Diarrhea - uncommon

Question 8

How do you diagnose?

Answer 8

Eggs in fecal flotation - can’t distinguish from Oesophagostomum spp.

Question 9

How do you treat and prevent?

Answer 9

Outdoor pigs affected usually

“Poor Sow Syndrome” - this nematode or modular worm

Anthelmintics effective against hypobiotic larvae

Pasture management/timing of treatments

Question 10

What is the common name?

Answer 10

Stomach worm