Cestodes- Week 2

Front 1

one of the segments of a tapeworm. each contains male and female reproductive organs when mature

Back 1

proglottid

Front 2

fleshy protuberance on the anterior end of the scolex. depending on the species, may bear hooks and be retractable.

Back 2

rostellum

Front 3

anterior end of a tapeworm. attaches to the intestinal wall using suckers and/or hooks

Back 3

scolex

Front 4

entire body of the tapeworm

Back 4

strobila

Front 5

entire body surface of platyhelminth. in cestodes, it absorbs nutrients and oxygen and releases wastes

Back 5

tegument

Front 6

Adult cestodes live in the ________ of the definitive hosts.

Back 6

intestines

Front 7

The larval stage of cestodes lives in the ________ of the intermediate hosts.

Back 7

tissues

Front 8

onchosphere, hexacanth

Back 8

embryo in cestode egg

Front 9

cestode uterus full of eggs

Back 9

gravid proglottid

Front 10

accidental ingestion of cysticercoid larva in dog or cat flea. rare or self limiting infection most often seen in children. adult worm lives in intestine. spontaneous loss of worm is often seen.

Back 10

Dog or cat tapeworm. zoonotic infection. Dipylidium caninum

Front 11

Back 11

Dipylidium caninum egg packet

Front 12

Back 12

Dipylidium caninum egg packet

Front 13

Broad fish tapeworm

Back 13

Diphyllobothrium latum

Front 14

adults can grow up to 20 meters long, may cause vague gastrointestinal distress and obstruction, complex life cycle. multiple intermediate hosts. human infected by eating raw or undercooked freshwater fish with larvae in muscles

Back 14

Diphyllobothrium latum

Front 15

Infection connected with macrocytic anemia. Tapeworm uses up to 100% dietary anemia

Back 15

Diphyllobothrium latum

Front 16

operculum

Back 16

a lid or caplike structure seen in D. latum eggs

Front 17

abopercular

Back 17

the end opposite the operculum

Front 18

Back 18

Diphyllobothrium latum egg

Front 19

Back 19

Diphyllobothrium latum scolex

Front 20

Back 20

Diphyllobothrium latum proglottids

Front 21

Back 21

D. latum egg

Front 22

Echinococcus granulosus

Back 22

Hyatid tapeworm

Front 23

seen in sheep raising area. canine definitive hosts. hexacanth embryo forms cyst in tissues

Back 23

Echinococcus granulosus

Front 24

ctst rupture may result in death

Back 24

Echinococcus granulosus

Front 25

found in the SW among native tribes

Back 25

Hyatid tapeworm

Front 26

a structure in the daughter cyst in which many scolices grow

Back 26

brood capsule

Front 27

granular material from older hyatid cysts thats includes free scolices, daughter cysts, hooklets and amorphous material

Back 27

hydatid sand

Front 28

a cyst formed in the intermediate host tissue that contains fluid, brood capsules, and daughter cysts. Grows slowly and can become quite large

Back 28

hydatid cyst

Front 29

Back 29

Echinococcus granulosus egg

Front 30

Back 30

Echinococcus granulosus egg

Front 31

Back 31

Echinococcus granulosus adult worm

Front 32

Back 32

Echinococcus granulosus scolex

Front 33

Back 33

hydatid cyst

Front 34

rat tapeworm

Back 34

Hymenolepsis diminuta

Front 35

human accidentally ingests flea or grain beetle that has larva- mild symptoms, often tapeworm is simultaneously lost

Back 35

rat tapeworm. Hymenolepsis diminuta

Front 36

Back 36

Hymenolepsis diminuta egg

Front 37

dwarf tapeworm

Back 37

Hymenolepsis nana

Front 38

no intermediate host. eggs are infective when released. larva matures in intestinal villus, emerges into intestinal lumen, attaches to mucosa. auto reinfection common.

Back 38

Hymenolepsis nana. dwarf tapeworm

Front 39

most common tapeworm in the US

Back 39

Hymenolepsis nana

Front 40

mice act as secondary host. adult worm 2-4 cm long

Back 40

Hymenolepsis nana. dwarf tapeworm

Front 41

Back 41

Hymenolepsis nana eggs

Front 42

Human infection initiated through ingestion of larva in undercooked beef

Back 42

Taenia saginata

Front 43

Human infection initiated through ingestion of larva in undercooked pork

Back 43

Taenia solium

Front 44

eggs of the two species are nearly identical- scolex and proglottids must be observed to differentiate

Back 44

Taenia saginata and Taenia solium

Front 45

Larvae can develop in human tissue, Humans are the only known definitive hosts

Back 45

Taenia species

Front 46

Back 46

Taenia eggs

Front 47

Beef tapeworm

Back 47

Taenia saginata

Front 48

Back 48

Taenia saginata scolex

Front 49

Back 49

Taenia saginata proglottid

Front 50

a thin walled fluid filled cyst enclosing a scolex

Back 50

cysticercus

Front 51

Back 51

Taenia solium scolex

Front 52

Back 52

Taenia solium proglottid

Front 53

Back 53

Taenia tapeworms

Front 54

Back 54

pollen artifact