PENYAKIT INFEKSIUS IPARASITIK 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.

Ant. end

segment

egg

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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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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Erchinococcus granulosus

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)

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Taenia solium

Daur Hidup

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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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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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