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Microbiology > Unit 1: 5.2 Parasitic Helminths > Flashcards

Unit 1: 5.2 Parasitic Helminths Flashcards

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Biology 101 flashcards
1
Q

Explain why we include the study of parasitic worms in microbiology

A

Helminth parasites are in microbio because they are identified by looking at microscopic eggs/larvae

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2
Q

What are the two major groups of parasitic helminths?

A
  1. Nematoda (roundworms)

2. Platyhelminthes (flatworms)

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3
Q

Nematoda (roundworm) characteristics?

A
  • unsegmented

- full digestive system

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4
Q

Platyhelminthes (flatworms) characteristics?

A
  • flatworms
  • flukes
  • tapeworms
  • tubellarians
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5
Q

Enterobius vermicularis (pinworm)

A
  • Nematoda
  • itching around anus
  • caused by worm EGGS
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6
Q

Toxocara canis & T.cati

A
  • nematodes found in dogs and cats

- caused by worm LARVAE

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7
Q

Necator americanus (hookworm)

A

-nematode

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8
Q

Trichinella spiralis

A
  • nematoda
  • causes Trichinellosis
  • undercooked meat releases LARVAE
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9
Q

Fluke (trematode) characteristics?

A
  • in platyhelminthes group

- non segmented flatworms with an oral sucker

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10
Q

Examples of trematodes?

A
  • Clonchiris

- Opisthorchis

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11
Q

What parasites cause schistosomiasis?

A
  • trematodes
  • Schistosoma mansoni
  • S. haematobium
  • S.japoncium
  • fresh water snails
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12
Q

Cestodes (tapeworms) characteristics?

A
  • in platyhelminthes group
  • segmented flat worms
  • have suckers/hooks at scolex
  • proglottids
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13
Q

Scolex

A

Head region of cestodes/tapeworms that have hooks that attach to wall of small intestine

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14
Q

Proglottids

A

Segments of cestodes that have reproductive structures

-when gametes are fertilized they release eggs

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15
Q

What group is Taenia saginata in? (Beef tapeworm)

A

Cestodes

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16
Q

Oncosphere

A

-tapeworm larval form

17
Q

Primary cause of infection due to nematodes?

A
  • intestinal parasites transmitted through undercooked foods through larvae
  • eggs in feces/anus of cats/dogs/humans
18
Q

Primary cause of infection due to trematodes

A

-fresh water snails

19
Q

Primary cause of infection due to cestodes?

A

-undercooked/contaminated meat like beef and pork

20
Q

What group of medically important flatworms is segmented and what group is unsegmented?

A
  • segmented: cestodes/tapeworms

- unsegmented: flukes/trematodes

Microbiology (31 decks)

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