Exam I - Physaloptera spp.

Question 1

Name the finals host(s) for Physaloptera spp

Answer 1

dogs & cats

Question 2

Name the intermediate hosts for Physaloptera spp

Answer 2

beetles, cockroaches, & crickets

Question 3

Name the paratenic host(s) for Physaloptera spp

Answer 3

snakes & birds

Question 4

In which organ would we expect to find adult Physaloptera spp?

Answer 4

In the stomach

Question 5

What is the approximate size of a Physaloptera spp. adult?

Answer 5

~4-6 cm

Question 6

How would you differentiate between Spirocerca lupi eggs and Physaloptera spp. eggs?

Answer 6

Physaloptera spp. eggs are elongated, ~45 um, and more oval than Spirocerca.

Question 7

Is the life cycle of Physaloptera spp direct or indirect?

Answer 7

Indirect.

Question 8

Describe the life cycle of Physaloptera spp.

Answer 8

Indirect.

1. L₁ is passed in the feces or vomitus and does not hatch until ingested by an intermediate host
2. In the intermediate host, larva develops to L₃ and encysts.
3. When the paratenic or intermediate host is ingested by the final host the L₃ is liberated and develops to the adult stage in the stomach.
4. The nematodes live with the anterior end embedded in the mucosa

Question 9

What is the PPP for Physaloptera spp?

Answer 9

8-10 weeks

Question 10

Name the approved treatment(s) for Physaloptera spp

Answer 10

There are no approved treatments, though various products are used.