Medically important cestodes

Question 1

Commonly called tapeworms

Answer 1

Class Cestoda

Question 2

Adults inhabit the ____ of vertebrate

Answer 2

Small intestine

Question 3

____ parasitize the tissue of both vertebrates and invertebrates

Answer 3

Larva

Question 4

Head of the organism

Answer 4

Scolex

Question 5

retractable, cone-like structure on anterior end of scolex, sometimes have hooks

Answer 5

Rostellum

Question 6

Long, narrow muscular grooves of pseudophyllidean tapeworms

Answer 6

Bothria

Question 7

Suckers of cyclophyllidean tapeworms

Answer 7

Acetabula

Question 8

Distinct types of proglottids

Answer 8

• Immature - no well-developed organs
• Mature - Well-developed organs
• Gravid - Filled with eggs

Question 9

Sperm is delivered to female organ via ____

Answer 9

copulatory spicules

Question 10

The uterus of pseudophyllidean is ____

Answer 10

non-branching

Question 11

The uterine pore of cyclophyllidean is ____

Answer 11

Absent

Question 12

Dibothriocephalus latus is formerly known as

Answer 12

D. latum

Question 13

Largest tapeworm that can infect human

Answer 13

Dibothriocephalus latus

Question 14

Infective stage of Dibothriocephalus latus

Answer 14

Plerocercoid (L2)

Question 15

1st intermediate host of Dibothriocephalus latus

Answer 15

Copepods

Question 16

2nd intermediate host of Dibothriocephalus latus

Answer 16

Fish

Question 17

Dibothriocephalus latus may cause ____ anemia

Answer 17

Pernicious anemia

Question 18

Vitamin deficiency caused by Dibothriocephalus latus

Answer 18

B 12

Question 19

Treatment for Dibothriocephalus latus

Answer 19

• Praziquantel (preferred)
• Niclosamide
• Vitamin B 12 supplements

Question 20

Spirometra mansoni reproduce in ____

Answer 20

canines and felines

Question 21

Humans are ____ hosts of Spirometra mansoni

Answer 21

Dead-end

Question 22

1st Intermediate host for Spirometra mansoni

Answer 22

Cyclops

Question 23

2nd intermediate host for Spirometra mansoni

Answer 23

Fish

Question 24

Ingestion of infected ______ will result in sparganosis

A. Cyclops
B. Fish

Answer 24

A. Cyclops

Question 25

H. nana is also called ____

Answer 25

dwarf tapeworm

Question 26

Ingestion of ______ from contaminated food and water will cause H. nana infection

Answer 26

embryonated eggs

Question 27

Autoinfection of H. nana in immunocompromised individuals may lead to ____

Answer 27

Tumors

Question 28

H. diminuta is also called ____

Answer 28

Rat tapeworm

Question 29

Intermediate hosts of H. diminuta

Answer 29

T.confusum and T. castaneum

Question 30

Infective stage of H. diminuta

Answer 30

Cysticercoid larvae

Question 31

H. diminuta most notable clinical manifestation

Answer 31

Eosinophilia

Question 32

Treatment for H. diminuta

Answer 32

- Praziquantel - Niclosamide - Nitazoxanide

Question 33

Also known as Hydatid tapeworm

Answer 33

Echinococcus Tapeworm

Question 34

The larval form (protoscolices) of E. granulosus may lodge in various body sites where they form a fluid-filled sac known as a _____

Answer 34

hydatid cyst

Question 35

germinal epithelium lining the hydatid membrane produces daughter cysts containing multiple scolices, called a _____

Answer 35

Brood capsule

Question 36

Definitive host of E. granulosus

Answer 36

Dogs

Question 37

Hydatid cysts are located most often in the _____

Answer 37

liver and lungs

Question 38

The presence of a _____ in a person with a history of exposure to ____ in an area where E. granulosus is endemic suggests a diagnosis of cystis echinococcosis.

Answer 38

cyst-like mass Sheepdogs

Question 39

These treatments replace surgery for cystic echinococcosis

Answer 39

Chemotherapy, cyst puncture, and PAIR

Question 40

At the anterior tip of the scolex of E. multilocularis is a ____

Answer 40

rostellum

Question 41

In intermediate hosts, the metacestode of E. multilocularis, or larval stage, takes the form of an ____

Answer 41

alveolar hydatid cyst

Question 42

Definitive hosts of E. multilocularis

Answer 42

Foxes

Question 43

Intermediate hosts of E. multilocularis

Answer 43

Small rodents

Question 44

Infective stage of E. multilocularis

Answer 44

Embryonated eggs

Question 45

Diagnostic stage of E. multilocularis

Answer 45

Alveolar hydatid cyst

Question 46

What cestode follows a ____

Answer 46

Prey-predator life cycle

Question 47

Dipylidium caninum is also known as _____

Answer 47

Flea tapeworm Cucumber tapeworm Double-pored tapeworm

Question 48

Diagnostic stage of D. caninum

Answer 48

Gravid proglottids

Question 49

Infective stage of D. caninum

Answer 49

cysticercoid-infected adult flea