Vets385 Cestodes & Trematodes basic information

What type of cestode is this?

Eucestoda (true tapeworm) Armed

What type of cestode is this?

Eucestoda (true tapeworm) Unarmed

What type of cestode is this?

Cotyloda (Psedudotapeworms) Unarmed

What is this atomic feature on True tapeworms that anchors itself into the muscosa of the small intestine

Rostellum

What is this slit like organelles that attach to hosts small intestines on Speudotapeowrms

Bothria

What is this area of anatomy on a tapeworm? 1

Scolex

What is this area of anatomy on a tapeworm? 2

The immature proglottids

What is this area of anatomy on a tapeworm? 3

Mature proglottids

What is this area of anatomy on a tapeworm? 4

Gravid proglottids

Where is the main nervous center in cestodes

The scolex

What are the cells in the proglottids that are used for excretion?

Flame cells

What type of egg is this?

Taenia-type

What type of egg is this?

Dipylidium type

What type of egg is this?

Moniezia or Pyriform Apparatus type

What type of egg is this?

Pseudophyllidian type

What type of metacestode stage is this?

Cysticercoid

What type of metacestode stage is this?

Cysticercus

What type of metacestode stage is this?

Strobilocercus

What type of metacestode stage is this?

Coenurus

What type of metacestode stage is this?

Hydatid Cyst

What type of metacestode stage is this?

Tatrathyridium

What is the genus for this egg?

Multiceps

Whats the common name for this egg?

Coenurus producing tapeworm

Who is the IH for this egg?

Sheep and goats

Whats this eggs genus name?

Teania

What do the neck regions of the cestodes do?

Growth

What is the body of the tapeworm called?

Strobila

What do immature proglottids hold?

Nonfunctional male and female reproductive tracts

Where are the reproductive functional parts of the cestodes?

In the mature proglottids

Where is the nutrients absrobed in the Cestodes body?

The Tegument

Whats the scientific name of this tapeworm?

Dipylidium caninum 

What is the common name of this Tapeworm?

Flea or louse tapeworm 

Cucumber seed tapeworm 

Who is the Definitve host(s) of this Cestode?

Dog and cat

What is the acetabula in a True tapeworm

4 suckers that attach to small intestine

What does the neck of a true tapeworm produce

strobila-proglottids

What is the body of a tapeworm called

strobila

What is the sexual reproduction of proglottids in true tapeworms ; cestodes

hemaphroditic

Where are the immature prolottids located?

Closest to neck/scolex

Are the immature proglottis capapable of reproduction

No

Where are the mature proglottis located

Middle region

Are mature proglottids capable of reproduction

Yes

Where are the Gravid proglottids located

Furthest from scolex and neck

Are gravid proglottids capable of reproduction

No

In cestodes where does the update of nutrients take place?

Body wall

What are the projections of the cestodes body wall called that reach towards host called

Microtriches

What do microtriches do for the cestode

help eat through body wall, Increase absorbtion area of tegument

What body systems do cestodes not have

Digestive, circulatory , respiratory , skeletal

Where is the main center for the nervous system in a cestode

scolex

What cells in the proglottid are used for excretion in cestodes

Flame cells

Where is the main exetory system in cestodes?

Runs the length of each proglottid

What organ does the excretory system in a cestode function like?

Kidney ; removes waste through filtration

Cestodes: What are Key structures in a Tanenia type egg

2 layer shell, 1 hexecanth

Cestodes: What are Key structures in a Dipylidium type egg

multiple hexecanth embryos within egg “egg packets”

Cestodes: What are Key structures in a Moniezia type egg

3 layered shell, pyriform (pear shape) apparatus, 1 hexecanth egg

Cestodes: What are Key structures in a Pseudophyllidian type egg

opperculum, 1 hexecanth

What is the 1st stage of genreal life cycle of Eucesodes

Gravid proglottids break off from adult taper worm and pass out of host

What is the 2nd stage of genreal life cycle of Eucesodes

ingested by intermicate host and develops into metcestode stage (L2)

What is the 3rd stage of genreal life cycle of Eucesodes

Migrates and enlarges in intermediate host - causing damage to IH

What is the 4th stage of genreal life cycle of Eucesodes

IH is eaten by definitive host

What is the 5th stage of genreal life cycle of Eucesodes

Everything but scolex and neck are digested away

What is the 6th stage of genreal life cycle of Eucesodes

migrates to small intestine, attaches and starts to develope into adult (L3)

What is needed in the Eucestode life cycle?

Inermediate host

What does definitve host need to do to get infected?

Eat Intermediate host

What is the adult form in Eucestodes

L3

When does the metacestode stage of eucestodes develop?

Within intermediate host

What does metacestode larva terminology depend on?

Selection of host, structure, preffered sites, and ability to cause disease

What are the metacestode (larva) stages

Cystercercoid, Cysticercus, Strobilocercus, coenurus, hytaid cyst, tetrathyridium

Where do cysticercoid metacestode stage exist in?

Arthopod vectors like fleas

What metacestode stage is this?

Cysticercoid

What is this metacestode stage that contains a single inverted scoelx?

Cysticercus

What is this metacestode (larva) stage that has a single scolex with a segmented body conneted to a fluid filled bladder?

Strobilocercus

What is this metacestode (larva) stage that contains many inverted scolices?

Coenurus

What are the Two types of Hydatid cysts ; Metacestode (larva) stages

Unicocular, Multiocular

What is the most dangerous mestacestode (larva) stage?

Hydatid cyst

Which type of Hydatid cyst has external budding?

Multiocular cysts

Which metacesode stage has Fluid filled cysts that form inside of an organ (mother cyst)

Hydatid cyst

Where is the Tetrathyyridium metacestode stage found?

In the 2nd Intermediate host of Mesocestoiudes sp (usually mouse, rat, reptile), in the abdominal cavity

What metacestode (larva) stage is this?

Tetrathyridium

Metacestode stages; Tetrathyridium can re produce asexually ____ within the 2nd intermidate host

Quickly

What is A?

Unicinaria or Ancylostoma

What is B?

Trichuris

What is C?

Toxocara

What is D?

Taenia

What is the body shape of trematodes?

Flat, unsegmented, leaf shaped

Trematodes have an _______________ digestive system

incomplete

Do Tremtodes have an anus?

No

What is it called when Trematodes regurgitate?

Fluke puke

What are the two suckers trematodes possess?

Oral sucker, Acetabulum

Where is the oral sucker of a trematode located?

Around the mouth

Where is the acetabulum sucker of a trematode located?

Ventral sucker

All trematodes are hermaphroditic except for the…

Blood flukes

What are key characteristics of trematode eggs?

Large and oval shaped, Golden/Brown colored, operculum

What do trematode eggs need to hatch?

Water

When would a trematode need 2 intermediate hosts?

If definitve host is a carnivore

When would trematode only need 1 intermediate host

cercaria encyst into metacercaria on a plant and DH is a herbivore

What stage of Trematodes is infective to DH

Metacercaria

What are 3 different ways trematodes can infect a host

penetrate skin, attach vegetation, develop into metacarcaria stage and await ingestion fron 2nd Im