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[그림 12] 돼지에서의 유구낭충증 생활사 Taeniasis is the infection of humans with the adult tapeworm
of Taenia saginata, T. solium or T. asiatica. Humans are the only definitive hosts for these three species.
Eggs or gravid proglottids are passed with feces The number 1; the eggs can survive for days to months
in the environment. Cattle (T. saginata) and pigs (T. solium and T. asiatica) become infected by ingesting
vegetation contaminated with eggs or gravid proglottids The number 2. In the animal’s intestine, the
oncospheres hatch The number 3, invade the intestinal wall, and migrate to the striated muscles, where
they develop into cysticerci. A cysticercus can survive for several years in the animal. Humans become
infected by ingesting raw or undercooked infected meat The number 4. In the human intestine, the
cysticercus develops over 2 months into an adult tapeworm, which can survive for years. The adult
tapeworms attach to the small intestine by their scolex The number 5 and reside in the small intestine
The number 6. Length of adult worms is usually 5 m or less for T. saginata (however it may reach
up to 25 m) and 2 to 7 m for T. solium. The adults produce proglottids which mature, become gravid,
detach from the tapeworm, and migrate to the anus or are passed in the stool (approximately 6 per
day). T. saginata adults usually have 1,000 to 2,000 proglottids, while T. solium adults have an average
of 1,000 proglottids. The eggs contained in the gravid proglottids are released after the proglottids are
passed with the feces. T. saginata may produce up to 100,000 and T. solium may produce 50,000
eggs per proglottid respectively. (출처: https://www.cdc.gov/dpdx/taeniasis/index.html).
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[그림 12] 돼지에서의 유구낭충증 생활사 Taeniasis is the infection of humans with the adult tapeworm
of Taenia saginata, T. solium or T. asiatica. Humans are the only definitive hosts for these three species.
Eggs or gravid proglottids are passed with feces The number 1; the eggs can survive for days to months
in the environment. Cattle (T. saginata) and pigs (T. solium and T. asiatica) become infected by ingesting
vegetation contaminated with eggs or gravid proglottids The number 2. In the animal’s intestine, the
oncospheres hatch The number 3, invade the intestinal wall, and migrate to the striated muscles, where
they develop into cysticerci. A cysticercus can survive for several years in the animal. Humans become
infected by ingesting raw or undercooked infected meat The number 4. In the human intestine, the
cysticercus develops over 2 months into an adult tapeworm, which can survive for years. The adult
tapeworms attach to the small intestine by their scolex The number 5 and reside in the small intestine
The number 6. Length of adult worms is usually 5 m or less for T. saginata (however it may reach
up to 25 m) and 2 to 7 m for T. solium. The adults produce proglottids which mature, become gravid,
detach from the tapeworm, and migrate to the anus or are passed in the stool (approximately 6 per
day). T. saginata adults usually have 1,000 to 2,000 proglottids, while T. solium adults have an average
of 1,000 proglottids. The eggs contained in the gravid proglottids are released after the proglottids are
passed with the feces. T. saginata may produce up to 100,000 and T. solium may produce 50,000
eggs per proglottid respectively. (출처: https://www.cdc.gov/dpdx/taeniasis/index.html).
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