猪囊尾蚴
Cysticercus cellulosae
组员：杨滨 袁镜乐 杨童周 张迪
Introduction
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Adult：Taenia solium（猪带
绦虫）
Taeniidae (带科)
Taenia（带属）
Final hosts： humans
Intermediate hosts：pigs,wild
pigs(野猪)，dogs,camels,cats
etc.
Sites: skeletal muscles(横纹
肌)， heart(心)，brain（脑），
eye（眼）etc.
Morphology
Cysticercus cellulosae
oval,as big as soy bean
semitransparent cyst(半透明包
囊)
filled with liquid
nodule(小结):a scolex inside,4
suckers and many hooks on the
scolex
Morphology
Adult
length：2~5m
700-1000 proglottids
scolex:sphericity,25~50ho
oks,4suckers
mature proglottid: without
digestive system(无消化系
统),a reproductive system in
each(每个成节均有1套雌雄
生殖器官)
gravid proglottid:full of
eggs
Life cycle
A taperworm larval cyst is ingested by
human through poorly cooked infected
meat.
 The larval escapes the cyst and passes to
the small intestine(小肠)where it attaches
to the mucosa by the scolex suckers.
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Life cycle
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The proglottids develop as the worm matures in
3~4 months.
The adult may live in the small intestine for as
long as 25 years and pass gravid proglottids with
the feces.
Eggs extruded from the proglottid contaminate
and persist on vegetation for several days and
are consumed by pigs in which they hatch and
form cysticerci in muscle.
Life cycle
Epidemiology
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Pigs can be infected by ingestion of eggs in feed
contaminated with human feces
Human may become infected with cysticercus by
eating raw or improperly cookd infected pork
No obvious seasonality,but rise in warm seasons
Sporadicity(散发性)
Susceptible animal:3~5 years in pigs
Signs
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no obvious signs in a general way
under serious infection
malnutrition(营养不
良),growthretardation,anaemia(贫血),muscle
edema(水肿)
“drunkenness(醉酒状)"
Lesions（病变）
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Pork is pale and moist
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Cysticercus can be found
in muscle as well as
brains,eyes,livers,spleens
,lungs and even in lymph
bodes and fat
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Cell infiltration then
fibrosis and become
calcification after death
about half year
Diagnosis
1.experience of the public
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Contour（外形）
Eyelid（眼皮）
Eye ground（眼底）
Lingual root （舌根）
Inner thighs（大腿里）
Diagnosis
2.Sanitary inspection of the pork
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cardiac muscle(心肌)
masseter(咬肌)
lingual muscle(舌肌)
limbs(四肢)
A definite diagnosis can be made with finding
cysticercus in those sites.
Diagnosis
Control
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Periodic inspection,
deworming : Praziquantel(吡喹酮) ，
Albendazole(丙硫苯咪唑) ，Flubendazole(氟苯
咪唑)
Positive census of cysticercus cellulosae
patients
Enhance excrement management
Ban no inspection of pork listed
Change your diet
References
李国清.兽医寄生虫学(双语版).北京:中国农
业大学出版社,2006
 internet
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