(F) Cestodes - lesson 1 (lecture-based)

Question 1

• flat
• ribbon like chain
• can reach lengths up to 10m or more and have hundreds of segments
• Each segment releases thousands of eggs

Answer 1

Cestodes

Question 2

Cestode AKA

Answer 2

tapeworms

Question 3

They have ribbon like chain segments called?

Answer 3

proglottids

Question 4

The whole segment is called

Gravid

Answer 4

STROBILA

Question 5

Enumerate the basic structure of a cestode

Answer 5

o Scolex (head)
o Neck region
o Immature proglottids
o Mature proglottids
o Gravid proglottids

Question 6

2 TYPES OF TAPEWORMS

Answer 6

Pseudophyllidean & Cyclophyllidea

Question 7

PSEUDOPHYLLIDEA or CYCLOPHYLLIDEA

Scolex: Spatulate/ flattened spatulate
Mature proglottids: Broad/widen
Gravid proglottids: Has uterine branches that contains eggs
Eggs: Operculum (cap like) Oval in shape

Answer 7

PSEUDOPHYLLIDEA

Question 8

PSEUDOPHYLLIDEA or CYCLOPHYLLIDEA

Scolex: Rhomboid/ quadrate
Mature proglottids: Longer Has genital pore
(contains testis, uterine, and ovaries)
Gravid proglottids: Has uterine branches that contains eggs
Eggs: No operculum Spherical in shape Presence of truncated prisms (characteristic of taenia spp.)

Answer 8

CYCLOPHYLLIDEA

Question 9

Scolex:

1. 2 ventral suckers
2. rhomboid/ quadrate shape with 4 ventral suckers; also has a presence of rostellum (may or may not have hooks)
   A. PSEUDOPHYLLIDEA
   B. CYCLOPHYLLIDEA

Answer 9

A, B

Question 10

PSEUDOPHYLLIDEA or CYCLOPHYLLIDEA

Mature Proglottid:

1. broad and wide; has a ventral genital pore
2. longer and has a lateral genital pore

A. PSEUDOPHYLLIDEA
B. CYCLOPHYLLIDEA

Answer 10

A, B.

Question 11

Gravid proglottid:
1. more concentrated at the center
2. several branching
3. Taenia solium and Taenia saginata
4. Diphyllobothrium latum
A. PSEUDOPHYLLIDEA
B. CYCLOPHYLLIDEA

u may repeat answers

Answer 11

A, B, B, A

Question 12

Pseudophyllidea

▪ Wider proglottid
▪ Branching of uterus

Answer 12

Diphyllobothrium latum

Question 13

Cyclophyllidea

Uterine branches of T. solium and T. saginata

Answer 13

7-13, 15-20

Question 14

Egg: Operculated

A. PSEUDOPHYLLIDEA
B. CYCLOPHYLLIDEA

Answer 14

A

Question 15

Solid form of Larva (2)

Answer 15

Procercoid & Plerocercoid

Question 16

Cystic/ vesicular form (4)

Answer 16

• Cysticercus
• Cysticercoid
• Coenurus
• Hydatis/echinococcus

Question 17

DIPHYLLOBOTHRIUM LATUS
* it is previously known as?
* Common name:
* Disease:
* Global distribution (GD):
* Habitat:
* Length:
* Infective stage to humans:

Answer 17

• Diphyllobothrium latum
• broad or fish tapeworm
• diphyllobothriasis
• Northern Italy, England, Sweden
• predominantly the ileum also the jejunum
• 3 to 10m in length
• Plerocercoid larvae

Question 18

• Scolex
  o Spatulate shaped
  o With 2 ventral suckers
• Mature proglottids
  o wide, broad
  o reproductive organs at the center
• Egg
  o Operculated (cap like)
  o Oval in shape
  Coracidium
  o Significant in the life cycle

can reach up to 10m

Answer 18

DIPHYLLOBOTHRIUM LATUS

Question 19

DIPHYLLOBOTHRIUM LATUS

MOT to humans

Answer 19

Ingestion of plerocercoid larvae from improperly cooked fish

Question 20

DIPHYLLOBOTHRIUM LATUS

Habitat (adult)

Answer 20

smoll intestine

Question 21

DIPHYLLOBOTHRIUM LATUS

Question 22

DIPHYLLOBOTHRIUM LATUS

Question 23

DIPHYLLOBOTHRIUM LATUS

Question 24

DIPHYLLOBOTHRIUM LATUS

Question 25

DIPHYLLOBOTHRIUM LATUS