Nematodes of the Swine Gut

Question 1

Hyostrongylus rubidus

Answer 1

red stomach worm, buries in gastric mucosa, produces nodules in stomach

Question 2

Stomach worms with Dung Beetles as intermediate host (2)

Answer 2

1. Physocephalus sexalatus
2. Ascarops strongylina

Question 3

Ascaris suum

Answer 3

very large, persist in environment (concrete), burrow into GI and migrate to liver (causing milk spots)

Question 4

Diphyllobothrium latum

Answer 4

mainly a fish parasite with zoonotic potential to humans and swine, needs intermediate hosts (aquatics)

Question 5

Strongyloides ransomi

Answer 5

threadworm, pathogenic to suckling piglets via skin penetration or milk

Question 6

Trichinella spiralis

Answer 6

zoonotic potential to humans with undercooked pork because larvae reside in skeletal muscle, but this is rare in the US

Question 7

Globecephalus urosubulatus

Answer 7

hookworm in SI, transcutaneus infection

Question 8

Most damaging nematode of the pig?

Answer 8

Trichuris suis (whipworm), causes diarrhea, anemia, poor growth

Question 9

Clinical Signs of Oesophagostomum in pigs?

Answer 9

none, just not good for sausage casings

Question 10

Macracanthorhynchus hirudinaceus

Answer 10

giant thorny headed worm, from grubs and beetles