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Flashcards in Helminths (complete) Deck (101)
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31

does the scolex of taenia sanginita have hooks

nope

32

what happens to the proglottids of taenia sanginitia

they are relesed into feces, then the eggs develop into onchospheres, which leave animal intestines and encyst into animal tissues. They develop there into cysticerci, which are ingested, then develop into adult worms

33

What is the treatment for taenia sanginata

niclosamide or PTZ

34

Can humans become the intermediate host of taenia solium

yes, but this is rare because the cysticerci develop in the human muscle, but this is a dead end for the taenia solium because the human tissue doesn't get eaten

35

can cysticerci in humans be pathogenic

yep, it can develop in the eye, CNS, and the heart

36

What can cysticerci in the CNS (neurocysticerosis) cause

epilepsy, meningitis, and encephalitis

37

how can neurocysticerosis be diagnosed

biopsy, CAT scan, MRI, look for subcutaneous cysticericosis first

38

how are cysticercosis treated

phenothiazine (PTZ)
corticosteroids
surgery

39

What are echinococcus granulosus

tapeworms of canines

40

how many proglottids do echinococcus granulosus have

3, one immature, one mature, and one gravid (each time the neck forms a new proglottid the gravid one falls off)

41

how are canines infected by echinococcus granulosus

by eating cysticerci in various herbivore hosts

42

what happens to humans with echinococcus granulosus

they can become accidental intermediate hosts if they ingest something contaminated with dog feces. they get Hydatid Disease

43

What is hydatid disease

an infection of echinococcus granulosus cysticerci. those cysticerci can grow and form hydatid cysts, this can cause tissue disfunction and if there are large numbers, death

44

What are trematodes

flukes, flat and leaf-shaped worms

45

what are the suckers like on trematodes

there are oral and ventral suckers that allow for attachment and nutrient obtaining

46

are trematodes dioecious or monoecious

they can be either

47

What is the most important trematode infector of humans

Schistosoma

48

how does a human infection of Schistosoma occur

motile cercariae in contanimated fresh water penetrate intact skin with the proteases stored in their head. Then they lose their tails and migrate via the circulation to the liver

49

where do Schistosoma mature

in the liver

50

do Schistosoma multiply in the host

nope, they do release eggs however

51

what do the eggs of Schistosoma elicit from the immune system

a granulomatous inflammatory response

52

What is another name for schistosoma

blood flukes

53

are blood flukes dioecious or monoecious

dioecious

54

What disease do blood flukes cause

schistosomiasis

55

What are the three species of Schistosoma

Schistosoma mansonii
Schistosoma haemotobium
Schistosoma Japonicum

56

does anything occur where a cercariae enters the skin

sometimes dermatitis

57

how serious can blood flukes be

they can become chronic and fatal

58

how do you prevent blood flukes

improved sanitation and avoiding contact with contaminated water

59

how do Schistosoma worms evade the immune system

by absorbing host complement regulatory proteins onto their surface

60

What is acuter Schistosomiasis

(katayama fever)