CESTODES

Question 1

Gen. Characteristics of Cestodes

Answer 1

General Characteristics:

1. Does not have a digestive tract
2. Hermaphroditic
3. Bilateral symmetry
4. Segmented

Question 2

coracidium

Answer 2

aquatic development of embryo

Question 3

Cyclophyllidean species

Answer 3

Taenia spp. Dipylidium,
Hymenolepis, Raillietina,
Echinococcus

Question 4

Pseudophyllidean

Answer 4

Diphyllobothrium,

Spirometra

Question 5

T. solium adult specie can be distinguished. TRUE or FALSE?

Answer 5

false

Question 6

Proglottids/Strobila of T. solium

Answer 6

7-15 lateral branches (dendritic

or fingerlike)

Question 7

smallest tapeworm

Answer 7

Hymenolepis nana / dwarf tapeworm

Question 8

Y shaped hooklets

Answer 8

Hymenolepis nana / dwarf tapeworm

Question 9

IS of T. saginata

Answer 9

cysticercus bovis

Question 10

dichotomous/ tree-like

Answer 10

T. saginata

Question 11

has direct and indirect infective stages

Answer 11

H. nana / dwarf tapeworm

Question 12

direct IS of H nana

Answer 12

Eggs

Question 13

Indirect IS of H nana

Answer 13

cercocystis.cysticercoid larva

Question 14

rat tapeworm

Answer 14

Hymenolepis diminuta

Question 15

fan like arrangement of hook

Answer 15

Hymenolepis diminuta/rat tapeworm

Question 16

IS of H. diminuya

Answer 16

cercocystis.cysticercoid larva

Question 17

other name/s of Dipylidium caninum

Answer 17

(dog tapeworm, cat

tapeworm, double-pored tapeworm)

Question 18

rose

thorn shaped hooks

Answer 18

Dipylidium caninum (dog tapeworm, cat
tapeworm, double-pored tapeworm)

Question 19

strobila characteristics of Dipylidium caninum

Answer 19

pumpkin seed/melon seed/rice grain-shaped

Question 20

Infective stage Dipylidium caninum

Answer 20

cercocystis/ cysticercoid larva

Question 21

D. latum new name

Answer 21

Dibothriocephalus latus

Question 22

D. latum other names

Answer 22

fish

tapeworm, broad fish tapeworm

Question 23

strobila of D. latum

Answer 23

rosette like coiled uterus

Question 24

1st intermediate host of D. latum

Answer 24

Copepods (cyclops/diaptomus) -procercoid larva

Question 25

2nd intermediate host: of D. latum

Answer 25

freshwater fish- plerocercoid | larva

Question 26

IS of D. latum

Answer 26

plerocercoid

Question 27

resembles Taenia spp. egg

Answer 27

Echinococcus granulosus

Question 28

IS stage of E. granulosus in intesine

Answer 28

embryonated egg ingested that becomes Hydatid cyst

Question 29

diagnostic stage of E. granulosus

Answer 29

cyst

Question 30

tests for E. granulosus

Answer 30

casoni intradermal test (>5cm for 30 | mins) bentonite flocculation test

Question 31

adult forms of this cestode are mistaken for adult Diphyllobothrium latum

Answer 31

Sparganosis