Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Fall 22: Parasites > 13. cestodes > Flashcards

13. cestodes Flashcards

1
Q

lifecycle of cestodes

A

tapeworms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

general characteristics of cestodes

A

No gut. Absorb food through surface.

Hermaphrodite - both sex organs in each proglottid (segment).

Almost all require at least 2 hosts to complete life cycle

tapeworm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

tapeworms hold onto host with

A

scolex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

tapeworm chains are also called

A

strobila- independent pregressively maturing reproductive unit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what organ is missing in tape worm

A

no digestion or feeding

absorb nurtients through skin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

gravid proglottid

A

oldest segment of tapeworm hold eggs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

mature proglottid

A

adult section of tapeworm that has all the things needed for reproduction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

oncosphere

A

egg of tapeworm

First stage larva, infective for first (or only) intermediate host

Consists of an embryo (hexacanth - 6 hooks) surrounded by two embryonic membranes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what do cyclophyllidea look like?

A

four radial muscular suckers on scolex
rostellum- retractable hooks
longer then wide
genital pore on lateral side
no opening to release eggs

tapeworm

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q
A

Cyclophyllidea- tapeworm

four radial suckers
rostellum with retractable hooks
lateral genital pore
no opening to release egg

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Taenia saginate DH and IH are

A

human
cattle

tapeworm

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Taenia solium infect

A

DH- human
IH- pig

tapeworm

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Taenia solium cause

A

cysts formation throughout muscle and brain

tapeworm of pigs to humans

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

lifecycle of Taenia solium

A

egg or gravid proglottids ingested by pig
forms cyst in tissue
human eats infected meat
tapeworm grows in small intestine

pig tapeworm

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Echinococcus granulosus infect

A

dogs
small tapeworm (4-5 segments)
scolex with rostellum and 4 suckers

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

lifecycle of Echinococcus granulosus

A

embyonated egg in dog poop
oncosphere hatches and forms hydatid cyst in lungs and liver
form protoscolex form cyst
dog ingest protoscolex
attach to dog intestine
grow into adult and make eggs

DH- dog
IH- sheep
IH- human- attack liver and lungs

Family taeniidae

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

hydatid disease

A

caused by echinoccosis(tapeworm)

larval stage
E. granulosus- cysts grow but don’t infiltrate

E. multilocularis- alveolar echinococcis- cysts grow and infltrate surrounding tissue- can be fatal

E. vogeli- polycyctsic

E. oligarthrus- extremely rare

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

hydatid cyst have

A

caused by Echinococcus tape worm

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

protoscolices found in hydatid cyst

A

hydatid sane

can be invaginated, evaginate

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Anoplocephala perfoliata infect

A

horses and donkeys
adults can be pathogenic
2 inches long

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

life cycle of anoplocephalidae

A

host eats mite with cysticercoid

develop into adult tape worm in intestine

mature gravid proglottids are shed and oncosphere eggs are released

mites eats oncosphere egg

oncosphere- cysticercoid inside mite

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

tapeworms of horses

A

Anoplocephala perfoliata

Anoplocephala magna, Paranoplocephala
mamillana (aka Anoplocephaloides mamillana)

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Anoplocephala perfoliata are found in the

A

cecum and in the ileum clustered near the
iliocecal valve of horses

Adults can be pathogenic, causing ulceration and associated inflammation, leading to serious, persistent diarrhea

tapeworm of horses

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

24
Q

Dipylidium caninum infect

A

dog tapeworm
spread by fleas and biting lice

double-pored

Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae

25
--- is a double pored dog tapeworm
Dipylidium caninum | spread by fleas and biting lice ## Footnote Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae
26
life cycle of dipylidium caninum
flea eat larva fleas mature- oncosphere- cysticercoid flea bites dog grows to adult in small intestine shed eggs | double pored dog tapeworm ## Footnote Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae
27
Anoplocephala magna, Paranoplocephala mamillana are found in --- and cause
tapeworm of horses small intestine usually non-pathogenic ## Footnote Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae
28
Hynebolepis nana lifecycle
can be spread by autoinfection- eggs hatch in intestine and complete life cycle and reinfect host without need for intermediate host can infect humans and mice IH- flour beetle not pathogenic- but disturbing | tapeworm ## Footnote Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae
29
Mesocestoididae life cycle
egg shed in gravid proglottids in feces IH host unkown (arthropod?) eat egg(oncosphere) second IH- to form **tetrathyridium**- asexual reproduction (mouse, frog) dog or cat or human eat second IH adult form in small intestine | tapeworm ## Footnote Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae
30
Davaineidae proglottina infect
chicken and pigeons | tapeworm ## Footnote Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae
31
Raillietine echinobothrida infect
chicken and turkeys | tapeworm ## Footnote Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae
32
lifecycle of Davainae proglottina
egg from chicken or pigeon eaten by IH (slug or snail) oncosphere- cysticercoid DH eat infected IH parasite grows in small intestine | tapeworm ## Footnote Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae
33
lifecycle of Raillietine echinobothrida
egg from chicken or turkey eaten by IH (slug or snail) oncosphere- cysticercoid DH eat infected IH parasite grows in small intestine | tapeworm ## Footnote Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae
34
pseudophyllidae look like
scolex with two shallow longitudinal grooves- bothria no hooks segments have uterine pore for release of eggs terminal segments are senile rather then gravid eggs have a shell require as least 2 IH | tapeworm ## Footnote Pseudophyllidea- Diphyllobothrium, spirometra
35
--- form gravid terminal segments --- form senile terminal segments
cyclophyllidea pseudophyllidea ## Footnote tapeworms
36
life cycle of Diphyllobothrium latum
aquatic stage: operculate egg coracidium 1st IH- copepod→procercoid 2nd IH →plerocercoid 3rd/ PH DH eat IH or PH | tapeworm ## Footnote Pseudophyllidea- Diphyllobothrium, spirometra
37
Spirometra mansonoides infect
dogs, cats, wild carnivores and pigs humans can be 2nd IH - cause eye issues | tapeworm ## Footnote Pseudophyllidea- Diphyllobothrium, spirometra
38
Diphyllobothrium latum infect
dog, cat, wild carnivore and humans | tapeworm ## Footnote Pseudophyllidea- Diphyllobothrium, spirometra
39
spirometra mansonoides cause --- in human
sparganosis eye issue- swelling humans act as 2nd IH | tapeworm ## Footnote Pseudophyllidea- Diphyllobothrium, spirometra
40
## Footnote Pseudophyllidea- Diphyllobothrium, spirometra Cyclophyllidea- taeniidae, anoplocephalidae, dilepididae, hymenolopododae, mesocestoididae, Davaineidae
41
Adult cestodes (tapeworms) reside in the small intestine of definitive hosts, with --- found in or near host feces.
eggs and gravid segments
42
--- are found in extraintestinal tissues in intermediate (and sometimes definitive) hosts and can cause severe pathogenesis.
Larval tapeworms
43
With a few exceptions, --- are not particularly pathogenic.
adult tapeworms
44
--- are hermaphroditic.
Cestodes(tapeworms)
45
Cestodes have no organs of ---; nutrients are absorbed through the surface of the worm.
feeding and digestion
46
--- cestode segments have no opening for release of eggs and therefore produce gravid segments; --- cestode segments do release eggs and produce senile (empty) segments.
Cyclophyllidean pseudophyllidean
47
--- tapeworms have aquatic stages in their life cycles.
Pseudophyllidean
48
acanthocephalans look
thorn head seperate sexus no gut cement gland in male- seals female vagina after sex ## Footnote Acanthocpehalans: macracanthorhynchus, oncicola
49
acanthocephalans ## Footnote Acanthocpehalans: macracanthorhynchus, oncicola
50
M. hirudinaceus infect
intestine of pigs, can infect dogs and other mammals IH: dung beetles can be pathogenic no longer common in USA because of concrete floors ## Footnote Acanthocpehalans: macracanthorhynchus, oncicola
51
--- are the IH of Macracathorhynchus hirudinaceus
dung, may and water beetles DH: pigs, can infect dogs and other mammals ## Footnote Acanthocpehalans: macracanthorhynchus, oncicola
52
Oncicola canis lifecycle
not really known DH- rare in dogs and cats IH- unkown- dung beetle? Possible paratenic hosts (lizards?, birds?, etc.) ## Footnote Acanthocpehalans: macracanthorhynchus, oncicola
53
M. hirudinaceus egg fully developed larve in egg generic acanthocephalan egg ## Footnote Acanthocpehalans: macracanthorhynchus, oncicola
54
how to diagnosis M. hirudinaceus
thick brown shelled ovoid egg adults with spiny nose, no gut or circulatory system ## Footnote Acanthocpehalans: macracanthorhynchus, oncicola
55
how does M. hirudinaceus attach to host
uses hooks no mouth cause necrosis and flattened villi at site of attachment ## Footnote Acanthocpehalans: macracanthorhynchus, oncicola
56
symptoms of M. hirudinaceus
Can be asymptomatic Ulceration and granuloma formation at site of infection Acute – Peritonitis - mechanical disruption of intestine wall Chronic – Related to worm burden – Competition for nutrients – Diarrhea, wasting, failure to thrive | spiny nose ## Footnote Acanthocpehalans: macracanthorhynchus, oncicola

Fall 22: Parasites (32 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions