Taenia solium

PENYAKIT INFEKSIUS I
PARASITIK VETERINER
Tape worms – Taenia spp
DIPERSIAPKAN OLEH :
Prof.Dr. Pratiwi Trisunuwati, drh,MS
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Identify this worm recovered from the small
intestines of a cat at necropsy.
Identify to genus.
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The egg, worm, and larval stage seen here is
representative of which parasite? It was found in the
small intestines of a dog at necropsy.
Identify to genus.
egg
Ant. end
segment
Larval stage
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T. saginata
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Taenia soleum
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Identify these worms found fecal washes of the small intestines of
a dog at necropsy.
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HUMANS, SHEEP, GOATS, Camels etc. (not dogs)
Eaten by sheep,
humans etc
Eggs in
dog feces
Cyst/contents in offal
eaten by dog
Dog intestine
From: www.biosci.ohio-state.edu/
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Human Larval tapeworm disease



Acquired from ingesting eggs from feces
 i.e. fecal oral
 Controlled by good sanitation
Hydatid cyst. Many intermediate hosts
including humans. (Dogs are definitive
hosts)
Cysticercosis Pigs and humans can both
be intermediate hosts infected via eatings
Taenia solium eggs released in human feces
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Cysticercosis
Taenia solium eggs release
larvae in small intesting
• Larvae penetrate intetsinal
wall and spread to multiple
sites including muscle, liver
and CNS
• Muscle infection – myalgias,
see calcifications by X-ray
•
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Calcified cysticerci in
muscle
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Cysticercosis
Brain infection - seizures
etc. Especially after a few
years when aging
cysticercus begins to swell
• Fairly common in parts of
Mexico where incidence of
pork tapeworm is high and
hygiene may be low
•
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Neurocysticercosis
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•
•
•
•
Many animals, including humans, can act
as intermediate hosts.
Herding animals with dogs associated as
an occupational risk
Larva forms a large ball like structure
filled with fluid and protoscolices (hydatid
sand).
On rupture of the cyst, protoscolices can
form new cysts.
•
Larval disease caused by Echinococcus
granulosus (hydatid cyst)
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Larval disease caused by Echinococcus
granulosus (hydatid cyst)
Antigens in fluid may
also cause anaphylaxis
leading to death.
• When protoscolices
eaten by dog, adult
tapeworm forms in
dog intestine
• Diagnosed by imaging
and serology
•
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Erchinococcus granulosus
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scolex
Tapeworms
Adult in intestinal lumen has a
scolex that attaches to intestine
wall, followed by the neck region
and strobila composed of
proglottids.
•immature near neck
• mature,
•gravid (with fertile eggs)
Mature
proglottid
Eggs (+ proglottids) in feces give
diagnosis
Gravid proglottid
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Tapeworms
Larval forms derived from eggs that are ingested
In correct host, eggs hatch within small intestine
and larva penetrates through intestinal wall and
migrates into tissues where it forms a mature
infective larva. This is the damaging form of
tapeworm disease
The infective larva, when eaten by a definitive
host, develops into the adult tapeworm within the
intestine
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Adult Tapeworms
Site in human
Source
Diagnosis
Beef
T. saginata
intestine
larva in beef
eggs(+proglottids) in feces
Pork
T. solium
Intestine
larva in pork
eggs(+proglottids) in feces
Fish
These have humans as their sole definitive host
intestine
larva in fish
eggs(+proglottids) in feces
D. Latum
May absorb beaucoup vitamin B12 and, if enough, cause megaloblastic anemia (rare)
Has a number of wild animals as reservoir definitive hosts
Control of adult tapeworm infection in humans
Cooking meat to kill larva
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Cacing pita pada manusia
Non obligatory
Taenia echinococcus
 Dipyllobothrium
 Hymenolopis
 Diphyllidium

obligatory



Taenia solium
Taenia saginata
T saginata taiwanensis
TAENIA SAGINATA (CACING PITA DAGING SAPI)
TAENIA SOLIUM (CACING PITA DAGING BABI)
TAENIA SAGINATA TAIWANENSIS (CACING PITA DAGING BABI)
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Taenia solium
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Daur Hidup
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b
c
d
e
e
a
b
c
d
Dipylidium caninum.
a. Scolex, consisting of 4 suckers and an armed rostellum, retracted into a sac in this
photograph.
b. Immature proglottid.
c. Mature proglottid. Note the two lateral genital pores, diagnostic for this species.
d. Gravid proglottid, in which the uterus has broken up into egg capsules, each
containing 5-20 eggs. Gravid proglottids are quite motile for a short time after being
passed out in the feces.
e. Two egg capsules in the uterus.
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Dipylidium caninum – Morfologi
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Dipylidium caninum – Morfologi
1. Ovum : 20 oncosphere dalam Ovigera
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As Rover sleeps,
tapeworm segments
are passed
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Any discussion ?
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