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Microbiology > Multicellular Eukaryotic Parasites Topic 5 Pre-Midterm > Flashcards

Multicellular Eukaryotic Parasites Topic 5 Pre-Midterm Flashcards

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Biology 101 flashcards
1
Q

Where do endoparasites live?

A

They live inside the body

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2
Q

What is an example of an endoparasite?

A

Tapeworms and Roundworms

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3
Q

What is the life cycle like for endoparasites?

A

Complex life cycles with several hosts

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4
Q

Where do enctoparasites live?

A

They live on the body (often only when feeding)

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5
Q

What is an example of ectoparasites?

A

Leeches, arthropods (mites, ticks, insects)

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6
Q

Ectoparasites and vectors

A

May serve as vectors for other pathogens

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7
Q

What are the three types of worms?

A

Flatworms, unsegmented round worms, and segmented round worms

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8
Q

What are the two types of anthropods?

A

Insects and (mites and ticks)

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9
Q

Ectoparasites may serve as what for other pathogens?

A

Vectors

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10
Q

Do leeches transfer diseases?

A

No

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11
Q

Give an example of an ectoparasite that can serve as a vector?

A

Mosquito

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12
Q

What are the two types of flatworms?

A

Tapeworms, Flukes

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13
Q

What is an example of a tapeworm?

A

Taenia

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14
Q

What is an example of a fluke?

A

Schitosoma

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15
Q

What is the one type of non-segmented round worm? and example

A

Nematode eg. Ascaris

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16
Q

What is the one type of segmented round worms?

A

Leeches

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17
Q

Simply describe the lifecycle of the flatworm and tapeworms?

A

Complex with multiple hosts

18
Q

What host is the human in a flatworm and tapeworm?

A

Definitive host and/or intermediate host

19
Q

Define the definitive host in a flatworm and tapeworm?

A

Where the parasite reaches maturity, and produces sexually

20
Q

Define the intermediate host in a flatworm and tapeworm?

A

Houses the immature (larval) stage of the parasite

21
Q

What host does sex always occur in (tapeworm and flatworms)

A

Definitive host

22
Q

If reproductive happens in the intermediate host, what type of sex is it?

A

Asexual in the larval

23
Q

What is the term for a tapeworm infection?

A

Taeniasis

24
Q

What is the definitive host in the beef tapeworm?

A

Human

25
Q

What is the intermediate host in the beef tapeworm?

A

Cow

26
Q

Where does the larval stage happen in a beef tapeworm?

A

The larval stage encyts in cow muscle and is ingested by human (obtained from uncooked beef)

27
Q

What host is the human in the pork tapeworm?

A

Definitive or intermediate host

28
Q

Where does the final form live in the pork tapeworm?

A

In the intestine, intermediate for cause cysticercosis of muscle, nervous tissue, or eyes

29
Q

How does a tapeworm complete their lifecycle?

A

They have to go through 2 or more different hosts (some need to go into specific hosts, if they are in the wrong host, they will die)

30
Q

How do you get the beef tapeworm?

A

By consuming uncooked meat (the worm dies at 56 degrees)

31
Q

Simply describe the steps of the beef tapeworm? (Cows –> Human)

A
  • Human consumes meat that has cysts in the muscle
  • Grows as adult in human small intestine
  • Eggs released in feces
  • Consumed by cow
32
Q

What is the scolex of a beef tapeworm?

A

“Head”

- has suckers and hooks

33
Q

What are the proglottids?

A
  • Body segments
  • Each contains ovaries and testis
  • Fill with eggs and are shed with feces
  • Don’t have internal organs
34
Q

What are the sex organs of proglottids?

A
  • Ovary
  • Uterus
  • Testes
35
Q

What host is the human in a pork tapeworm?

A

The definitive or intermediate host
Definitive = Ate pork that had larva inside the meat
Intermediate = Ate the eggs

36
Q

Describe the lifecycle of a pork tapeworm?

A

See slide 14

37
Q

What happens in cysticercosis?

A

The human is the intermediate host due to ingestion of eggs

  • Larvae are able to invade tissue (muscle, eye, brain, spinal cord, heart)
  • Don’t grow into adult form or reproduce in intermediate host
38
Q

How can cysticercosis happen?

A

May have ate vegetables that were raw

39
Q

What is neurocysticercosis (NCC)?

A

Larval cysts travel to the brain

- The most common parasitic infection of CNS

40
Q

How many hosts may tapeworms go through?

A

4 or 5

41
Q

Tapeworms for pets

A

The larva lives inside the flea (flea is the intermediate host), the dog needs to eat the flea to complete the life cycle

Microbiology (13 decks)

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