Exam II - Haemonchus spp.

Question 1

What is the common name for Haemonchus placei?

Answer 1

barber pole worm, wireworm

Question 2

What is/are the host(s) for Haemonchus placei?

Answer 2

cattle

Question 3

What is/are the host(s) for Haemonchus contortus?

Answer 3

sheep, goats

Question 4

What is the site of infection for Haemonchus placei?

Answer 4

abomasum

Question 5

Describe the appearance of Haemonchus placei adults

Answer 5

Adults are easily identified because of their presence in the abomasum and their large size (2-3 cm). In fresh specimens, the white ovaries wind spirally around the blood-filled small intestine, producing a “barber-pole” appearance.

Question 6

Describe the appearance of Haemonchus placei eggs

Answer 6

Haemonchus placei eggs are typical trichostrongyloid, oval, up to 85 um, thin shelled, outer surface of shell smooth, containing morula.

Question 7

Is the Haemonchus placei life cycle direct or indirect?

Answer 7

direct.

Question 8

What is the PPP for Haemonchus placei?

Answer 8

23-28 days

Question 9

In hyperacute cases of haemonchosis, calves die from _____________

Answer 9

hemorrhagic gastritis

Question 10

Describe some clinical signs associated with Haemonchus placei

Answer 10

• anemia
• bottle jaw
• ascites
• lethargy
• dark-colored feces

Question 11

What is an imporant clinical sign that **is **seen with Haemonchus placei, but is not seen with Ostertagia ostertagi

Answer 11

anemia.