Large Animal Trichostrongyle GI Nematodes

Question 1

Who are the Trichostrongyle hosts?

Answer 1

Cattle, Sheep, Goat

Question 2

Where are the Trichostrongyles located within the host?

Answer 2

Abomasum and Intestines

Question 3

How are Trichostrongyles diagnosed in Large Animals

Answer 3

-fecal float for eggs
- fecal culture for larvae

Question 4

Trichostrongyle larva hatch from eggs and are free living. What stage do they mature?

Answer 4

Third stage (infective)

Question 5

How does a host become infected with Trichostrongyle?

Answer 5

Ingested with grass

Question 6

Which two Genera of Trichostrongyle Nematodes have zoonotic potential?

Answer 6

Bunostomum spp. and Trichostrongylus spp.

Question 7

Problems from Trichostronglye infections vairy from from which two dependent factors?

Answer 7

Species and Intensity

Question 8

What are some possible clinical signs

Answer 8

• bottle jaw
• anemia
  -weakness
  -diarrhea
• sudden death

Question 9

What are some subclinical signs

Answer 9

• reduced appetite/ weight
• reduced reproduction
• reduced milk production

Question 10

There is also a genera of large egg strongyle

Answer 10

Nematodirus spp

Question 11

Large eggs will be visible in fecal floatation. What is in the center of a Trichostrongyle egg?

Answer 11

Morula

Question 12

If there are low numbers of Large Egg Trichostrongyle present there will be no clinical disease. Why

Answer 12

it is a “disease of abundance”

Question 13

One clinical sign of Nematodirus is Mucosal Disruption. What is the result?

Answer 13

Protein and weight loss due to malabsorption or protein and nutrients (diarrhea)

Question 14

Other clincial signs of Nematodirus

Answer 14

• Tucked up abdomen
  -Dull fleece
  -Mortality