(DON'T STUDY) migratory strongylids Flashcards
Strongylus equinus
three sharply pointed teeth in their buccal capsule
Strongylus equinus
dorsal tooth has a double point (bifid)
Strongylus equinus
2 ventral teeth
Strongylus edentatus
has no teeth in the buccal capsule
Strongylus vulgaris
pair of rounded teeth in the buccal capsule
Strongylus equinus
least common of the three species
Strongylus equinus
exsheathment in small intestine
Strongylus equinus
penetrates intestinal wall to peritoneal cavity, migrates to the liver for 6-7 weeks
Strongylus equinus
leaves liver across abdominal cavity to wall of cecum often passing through the pancreas en route
Strongylus equinus
enters the gut lumen and matures
Strongylus equinus
PPP at least 9 months
Strongylus edentatus
Exsheatment small intestine
Strongylus edentatus
to liver via hepatic portal blood stream remains approx. 2 months
Strongylus edentatus
leaves liver traveling via the hepatic ligaments to beneath parietal peritoneum where larvae develop in cyst like nodules for 4-6 months
Strongylus edentatus
returns to cecum across abdominal cavity
Strongylus edentatus
PPP at least 11 months
Strongylus vulgaris
exsheathment in small intestine
Strongylus vulgaris
penetrates wall of small intestine, cecum, and colon
Strongylus vulgaris
moults to L4 – leaves the intestine from all these locations
Strongylus vulgaris
enters terminal branches (arterioles) of cranial mesenteric artery in the small and large intestine
Strongylus vulgaris
migrates up against the blood flow on the surface of the intimacy and they induce inflammatory changes as they progress through the arteries
Strongylus vulgaris
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
Strongylus vulgaris
a few larvae may travel further up the aorta
Strongylus vulgaris
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
Strongylus vulgaris
PPP at least 6 months
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
TRUE
