Exam III - Image Identification

Question 1

You see this when you look at the abomasal mucosa of a goat. What is the scientific name of the parasite that causes this? What is the common name?

Answer 1

Teladorsagia circumcinta causes the “Moroccan Leather” appearance.

Brown Stomach Worm.

If this was a cow, the culprit would be Ostertagia ostertagi.

Question 2

Identify the parasite and life cycle stage.

Cows at what age are most susceptible to this parasite?

Answer 2

Babesia bigemina trophozoites in RBCs.

Older animals are more susceptible (inverse age susceptibility)

Question 3

Identify the parasite responsible if this is what the abomasal mucosa looks like in a goat.

What is the infective stage of this parasite?

Answer 3

Teladorsagia circumcinta.

Infective stage is L₃

Question 4

Identify the parasite and life cycle stage present.

What is the infective stage and how soon is it infective?

Answer 4

Cryptosporidium spp. oocyts (in modified acid fast stain)

The sporulated oocyst is infective immediately after being discharged from the host

Question 5

A fecal smear shows these organisms. Identify the parasite.

What is/are its site(s) of infection?

Answer 5

Cryptosporidium spp.

Digestive and Respiratory Epithelium