penyakit infeksius i parasitik veteriner · penyakit infeksius i parasitik veteriner tape worms ......
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PENYAKIT INFEKSIUS IPARASITIK VETERINER
Tape worms – Taenia spp
DIPERSIAPKAN OLEH :Prof.Dr. Pratiwi Trisunuwati, drh,MS
6/10/2012 taeniasis 2012-pts1
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.
Ant. end
segment
egg
Larval stage
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Identify these worms found fecal washes of the small intestines of
a dog at necropsy.
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From: www.biosci.ohio-state.edu/
Cyst/contents in offal eaten by dog
Dog intestine
Eggs indog feces
Eaten by sheep,humans etc
HUMANS, SHEEP, GOATS, Camels etc. (not dogs)
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 eatingsTaenia 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
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
Larval disease caused by Echinococcusgranulosus (hydatid cyst)
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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 Echinococcusgranulosus (hydatid cyst)
• Antigens in fluid may also cause anaphylaxis leading to death.
• When protoscoliceseaten by dog, adult tapeworm forms in dog intestine
• Diagnosed by imaging and serology
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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)
Eggs (+ proglottids) in feces give diagnosis
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scolex
Mature
proglottid
Gravid proglottid
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 intestine larva in beef eggs(+proglottids) in fecesT. saginata
Pork Intestine larva in pork eggs(+proglottids) in fecesT. solium
These have humans as their sole definitive host
Fish intestine larva in fish eggs(+proglottids) in feces
D. LatumMay absorb beaucoup vitamin B12 and, if enough, cause megaloblastic anemia (rare)Has a number of wild animals as reservoir definitive hosts
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Control of adult tapeworm infection in humansCooking meat to kill larva
Cacing pita pada manusia
Non obligatory obligatory
Taenia echinococcus
Dipyllobothrium
Hymenolopis
Diphyllidium
Taenia solium
Taenia saginata
T saginata taiwanensis
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TAENIA SAGINATA (CACING PITA DAGING SAPI)TAENIA SOLIUM (CACING PITA DAGING BABI)TAENIA SAGINATA TAIWANENSIS (CACING PITA DAGING BABI)
e
b c d
b c d
ea
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. 6/10/2012 taeniasis 2012-pts
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