R**********n
发帖数: 473 | 1 Goljan says, eating larva of T. solium becomes definitive host and larva
would become adult and lay eggs. Where do they lay eggs? intestine? Why eggs
won't go to the brain?
eating eggs would become intermediate host and eggs would become larva and
go to brain and get neurocysticercosis. How does larva go to brain? Digging
a hole in intestinal vessel? how can a larva go to systemic circulation? and
why this time the larva won't become adult and lay eggs?
百思不得奇姐 |
m****8
发帖数: 419 | 2 http://www.springerlink.com/content/nh272j502n111261/fulltext.pdf
Egg
release begins approximately 2 months postinfection and occurs via the passage of
3–5 whole proglottids at a time in the human feces. Each proglottid can contain
50,000 eggs, which can survive for months in the external environment. Once an intermediate host ingests the eggs, they hatch in the host’s gastrointestinal tract,
releasing oncospheres that penetrate the intestinal wall and migrate to other tissues
through the BLOODS |
m****8
发帖数: 419 | 3 Autoinfection can occur in people when gravid
proglottids of an intestinal worm rupture and hatching oncospheres are
activated
in the small intestine, rendering them capable of causing cysticercosis. The
prevalence
of antibodies to oncospheres suggests that this occurs more frequently than
previously thought. |
R**********n
发帖数: 473 | 4 Thanks! so complex. still, why lava won't become adult again and lay eggs ? |
