(DON'T STUDY) migratory strongylids

Question 1

Strongylus equinus

Answer 1

three sharply pointed teeth in their buccal capsule

Question 2

Strongylus equinus

Answer 2

dorsal tooth has a double point (bifid)

Question 3

Strongylus equinus

Answer 3

2 ventral teeth

Question 4

Strongylus edentatus

Answer 4

has no teeth in the buccal capsule

Question 5

Strongylus vulgaris

Answer 5

pair of rounded teeth in the buccal capsule

Question 6

Strongylus equinus

Answer 6

least common of the three species

Question 7

Strongylus equinus

Answer 7

exsheathment in small intestine

Question 8

Strongylus equinus

Answer 8

penetrates intestinal wall to peritoneal cavity, migrates to the liver for 6-7 weeks

Question 9

Strongylus equinus

Answer 9

leaves liver across abdominal cavity to wall of cecum often passing through the pancreas en route

Question 10

Strongylus equinus

Answer 10

enters the gut lumen and matures

Question 11

Strongylus equinus

Answer 11

PPP at least 9 months

Question 12

Strongylus edentatus

Answer 12

Exsheatment small intestine

Question 13

Strongylus edentatus

Answer 13

to liver via hepatic portal blood stream remains approx. 2 months

Question 14

Strongylus edentatus

Answer 14

leaves liver traveling via the hepatic ligaments to beneath parietal peritoneum where larvae develop in cyst like nodules for 4-6 months

Question 15

Strongylus edentatus

Answer 15

returns to cecum across abdominal cavity

Question 16

Strongylus edentatus

Answer 16

PPP at least 11 months

Question 17

Strongylus vulgaris

Answer 17

exsheathment in small intestine

Question 18

Strongylus vulgaris

Answer 18

penetrates wall of small intestine, cecum, and colon

Question 19

Strongylus vulgaris

Answer 19

moults to L4 – leaves the intestine from all these locations

Question 20

Strongylus vulgaris

Answer 20

enters terminal branches (arterioles) of cranial mesenteric artery in the small and large intestine

Question 21

Strongylus vulgaris

Answer 21

migrates up against the blood flow on the surface of the intimacy and they induce inflammatory changes as they progress through the arteries

Question 22

Strongylus vulgaris

Answer 22

larvae cease migrations at the root of the artery where it leaves the aorta and they cause endarteritis and the formation of the thrombus in which larvae are embedded

Question 23

Strongylus vulgaris

Answer 23

a few larvae may travel further up the aorta

Question 24

Strongylus vulgaris

Answer 24

larvae remain at the root of the cranial mesenteric artery for 3-4 months then mount for the last time and return to the cecum and colon in the blood stream

Question 25

Strongylus vulgaris

Answer 25

PPP at least 6 months

Question 26

TRUE/FALSE

Strongylus vulgaris: when larvae leave or enter the intestine they rest beneath the serosa for a short time and are temporarily enclosed in nodules caused by the host’s tissue reaction

Answer 26

TRUE