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Parasitology > ParaLab - Fecal Artifacts > Flashcards

ParaLab - Fecal Artifacts Flashcards

1
Q

Fecal artifacts are also called as what?

A

Confusers or Pseudoparasites

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2
Q

Fecal Artifact that resembles Taenia and other helminth eggs; it has little to no internal structures; lacks 6-hooked oncosphere and embryo wall

A

Pollen

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3
Q

Fecal Artifact that appears polygonal and flattened, may be confused with helminth eggs but appear larger than them. They also have unorganized interior portions and contain large vacuoles.

A

Vegetable Cells

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4
Q

Artifacts with ladder-like appearance and may be confused w/ helminth larva because of size and shape; lacks head and tail region

A

Vegetable Spirals

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5
Q

Artifact that can be confused with helminth larva (strongyloides and hookworm) and has a reflective center. it also lacks internal structure and head/tail region.

A

Plant Hair/Fiber

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6
Q

Artifact that is round and oval in shape; may be confused w/ cryptosporidium, cyclospora, microsporidia, helminth eggs, or protozoan cysts.

A

Yeast

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7
Q

Size of yeast?

A

4 to 8 um in size

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8
Q

what is normally present in stool so reporting isn’t necessary?

A

Yeast

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9
Q

presence of what may be an indication of pathogenicity of the yeast present (Candida spp.)?

A

branching pseudohyphae

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10
Q

Artifacts that are round to irregular round-shaped and are very refractile; may resemble protozoan cysts

A

Starch cells/granules

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11
Q

A starch granule may be identified as it is if it is less than ____ um?

A

Starch granules if less than 10 um

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12
Q

In iodine staining, what is the color of undigested starch?

A

blue-black

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13
Q

In iodine staining, what is the color of partially digested starch?

A

Red/pink

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14
Q

Artifacts that are the protozoan parasites of crayfsh. Present in stool if crayfish is consumed in significant amounts.

A

Beaver bodies

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15
Q

Sometimes known as corpora parasitica and resemble helminth ova; has no clinical significance

A

Beaver bodies

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16
Q

Artifacts that are spherical in shape and resemble protozoan cysts; present in steatorrhea

A

Fat globules

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17
Q

large amounts of this may indicate excess fecal fat

A

fat globules

18
Q

clinical term for excess fecal fat?

A

steatorrhea

19
Q

observation of how many fat globules per HPO may indicate steatorrhea?

A

> 60 large fat globules

6 - 75um in size

20
Q

Artifacts that are rectangular in shape and may appear with or without striations

A

Muscle fiber

21
Q

Artifacts that are present in high red-meat diet

A

muscle fiber

22
Q

Presence of striated fibers may indicate what?

A

gastrocolic fistulas and pancreatic sufficiency (cystic fibrosis)

creatorrhea*

23
Q

Confuser that may be confused with tapeworm proglottid

A

Muscle fiber

24
Q

Fecal Artifact that results from improperly prepared wet mounts/smear?

A

Air bubbles

25
Q

Artifacts that appear as slender crystals w/ pointed ends (diamond-shaped) and are the breakdown products of eosinophils.

A

Charcot leyden crystals

26
Q

Artifacts that stain purple with trichome stain and may indicate hypersensitivity/allergic rxn and helminthic infections

A

Charcot leyden crystals

27
Q

Artifacts that appear large w/ refractile nucleus and distinct cell borders. Looks like amoebic trophozoites but lacks the interior structures of these trophs.

A

Epithelial cells

28
Q

Squamous epithelial cells most likely came from where?

A

anal mucosa

29
Q

Columnar epithelial cells most likely came from where?

A

intestinal mucosa

30
Q

True or False

Vegetable cells may easily be confused with helminth eggs

A

True

31
Q

True or False

Thick-walled pollen grains resemble the eggs of Taenia spp

A

True

32
Q

True or False

Starch granules may appear at first glance to be protozoan cysts particularly those of E. hartmanni & E. nana.

A

True

33
Q

True or False

Presence of air bubbles suggests uneven smear

A

True

34
Q

True or False

Polymorphonuclear white blood cells are often mistaken for amebic cysts, especially those of Entamoeba histolytica

A

True

35
Q

Confusers that are indicators of helminthic infection

A

Charcot Leyden crystals

higher eos breakdown = higher charcot leyden

36
Q

what confuser may be confused with protozoan trophozoites?

immune system cell

A

white blood cells

  • PMNs = likely protoz cysts
  • Macrophages = likely amoebic trophz
37
Q

Sphere-looking cyst-like structures; present in steatorrhea

A

fat globules

38
Q

Rectangular structures representing undigested meat fibers

A

Muscle fiber

39
Q

Coiled strand of vegetable remnants iwth a ladder-like appearance

A

Vegetable spirals

40
Q

These are diamond-shaped crystals which develop from eosinophil breakdown products

A

Charcot Leyden

Parasitology (25 decks)

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