CESTODES

Question 1

Name parasites in the superfamily - cestodes

Answer 1

anoplocephala perfoliata/magnum

paranplocephala mamillia

taenia spp

echinococcus granulosus and multilocularis

dipydium caninum

Question 2

which parasites are uique to equids?

Answer 2

a. perfoliata and magum
p. mamillia

Question 3

describe the basic cestode lifecycle

Answer 3

• indirect
• adults in SI
• proglottids - shed and disintegrate in faeces
• eggs ingested by IH and metacestode stage develops
• metacestode ingested by DH

Question 4

describe the basic characteristics of cestodes

Answer 4

head = scolex with a rostellum

rostellum may/may not have hooks

lappets = usually x4

body = strobilli

no alimentary tract

proglottids have genital pore x1

Question 5

name the 4 types of metacestodes

Answer 5

1. cysticercus
2. coenurus
3. hydatid
4. cysticercoid

Question 6

name this and give an example of the cause: is:

Answer 6

cysticercus

taenia spp

Question 7

name this and give an example

Answer 7

hydatid

echinococcus

Question 8

name and give example?

Answer 8

cysticercoid

diplydium caninum

Question 9

describe the basic properties of cestode eggs

Answer 9

circular - ovoid

thick shell

oncosphere

striped brown outershell

infective egg

Question 10

anoplocephala perfoliata IH is what?

Answer 10

orbatid mite

Question 11

what is the Metacestode stage (MS) in anoplocephala perfoliata?

Answer 11

cysticercoid

Question 12

what is the pathogenesis of anoplocephala perfoliata?

Answer 12

enteritis

colic

<3yo

Question 13

what is the general treatment for cestodes and what difference in tx plan is their for horse?

Answer 13

praziquantel - removes adults

2x dose in H

control IH - mites, fleas, lice, eating dead livestock

Tx interval = PPP of cestode

Question 14

what is the PPP of anocephala perfoliata ?

Answer 14

2mths

Question 15

what are the regulations on pets re-entering the UK regarding tx?

Answer 15

must be tx with praziquantel 1-5d before re-entry

Question 16

what atenia spp use sheep as the IH? and where is the metacestode?

Answer 16

t. ovis (muscle)
t. hydatigena (peritonium)
t. multiceps (brain)

Question 17

which taenia spp use rabbits as the IH and where are the metacestodes?

Answer 17

t. pisiformis (peritoneium)
t. serialis (SC tissues)

Question 18

name the two echinococcus spp and the major chatacteristics?

Answer 18

e. granulosus - IH = domestic livestock; DH = dog
e. multilocularis - IH = wildlife; DH = foxes; alveolar, horrible dz

Question 19

what are the symptoms of human hydatid disease and wht is responsible?

Answer 19

cysts in liver, lung and brain

jaundice, cholangitis, pleurisy, anaphylactic shock, neuro signs

echinococcus

Question 20

name the only tapeworm of cats ONLY and how it is identified

Answer 20

taenia teaniformis

bell shaped proglottis

16 d PPP

IH mouse - treat mousers lots!

Question 21

what animals does diplydium caninum effect?

Answer 21

C+D

Question 22

what is characteritic of d. caninum morphology?

Answer 22

scloex with 4 suckers and rosteullum with 4+ hooks

Question 23

what is the IH of d. canimum

Answer 23

ctenocephelides felis

trichodectes canis

Question 24

why are d. caninum usually treated - as they are actually asymptomatic

Answer 24

motile proglottids are horrid to look at

Question 25

what is the PPP of d. caninum ?

Answer 25

4-6wks