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parasitology > PARA LAB - FECAL ARTIFACTS > Flashcards

PARA LAB - FECAL ARTIFACTS Flashcards

1
Q

Fecal artifacts is also known as

A

Pseudoparasite

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2
Q

Are responsible for incorrect identification “confusers”

A

fecal artifacts

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3
Q

Components of Feces

A
  • undigested food
  • digestive by-products
  • human cells
  • secretions from digestive tract
  • microorganisms (because human intestine contains microbiota)
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4
Q

T/F: Artifacts in human samples are responsible for incorrect identification “Confusers”

A

True - waste component of our body can be mistakened as parasite

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5
Q

T/F Fecal artifacts are pseudoparasites often mistaken as real parasites.

A

True

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6
Q

T/F Artifacts in human samples are responsible for incorrect identification “Confusers”

A

True

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7
Q

What can be mistaken as an ascaris egg or taenia egg or other helminth eggs

A

Pollen

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8
Q

How to distinguish pollen from a parasite

A
  • check size and shape
  • has no internal structures
  • lack 6-hooked oncosphere found in Taenia
  • taenia has striations
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9
Q

T/F Pollen has no internal structures

A

True

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10
Q

T/F Presence of oncosphere is an indication of Taenia parasite

A

True

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11
Q

Fecal artifact that may be confused with helminth eggs

A

Vegetable cell

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12
Q

How to identify a vegetable cell

A
  • Vegetable cells appear larger in size
  • Vegetable Cell appear polygonal and flattened
  • Vegetable Cell’s interior portion is unorganized and contain large vacuoles
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13
Q

Fecal artifact that may be confused with helminth larva and tapeworm eggs

A

vegetable spirals

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14
Q

How to identify a vegetable spirals

A
  • Vegatable has ladder-like appearance
  • vegetable cell lacks head or tail region
  • tapeworm egg have internal organs
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15
Q

Fecal artifact that may be confused with helminth larva such as hookworms & strongyloides because of shape and size

A

PLANT HAIR/FIBER

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16
Q

How to know if it is not a parasite but instead a plant hair/fiber

A
  • It Lacks head or tail region and It has no internal organs
  • They are often broken at one end
  • It must have a refractile center
  • Lack internal structures seen in true parasites
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17
Q

T/F Budding is an indication of candida albicans

A

True

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18
Q

Fecal artifact that May be confused with Cryptosporidium spp., Cyclospora spp., microsporidia, helminth eggs, or
protozoan cysts (depending on size and color)

A

Yest cell

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19
Q

Agent of diarrhea

A

Coccidian parasites: Cryptosporidium spp.,
Cyclospora spp.

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20
Q

T/F Fresh or freshly preserved stools with significant numbers of budding yeast may indicate systemic infection especially in immunosuppressed patients

A

True

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21
Q

T/F The presence of branching pseudohyphae may be an indication of pathogenicity of the yeast present (Candida spp.) and should be reported

A

True

22
Q

Fecal artifact that resemble protozoan cyst (E. hartmanni & E. nana)

A

Starch cells/Granules

23
Q

Common Fecal Artifact when using powderized gloves also when slides are reused and cover slip is dirty

A

Starch Cells/ Granules

24
Q

if <10 um

A

starch cells/granules

25
Q

Staining used in Starch Cells

A

Iodine Staining

26
Q

T/F Undigested starch stains = Blue-black

A

True

27
Q

T/F Partially digested = Red/Pink

A

True

28
Q

WHAT FECAL ARTIFACT IS BEING DESCRIBED
● Round to irregular round-shaped
● “Starch granules” if <10 um
● Very refractile
● Has no internal structure of nucleus
● It may resemble protozoan cysts (E. hartmanni & E.
nana)

A

Starch cells

29
Q

Fecal artifact that may be confused with helminth ova

A

Beaver bodies

30
Q

A parasite that cant infect humans and has no clinical significance

A

beaver bodies

31
Q

also known as corpora parasitica

A

beaver bodies

32
Q

Fecal artifact found when crayfish is consumed

A

Beaver bodies

33
Q

Protistan parasites of crayfish

A

Beaver bodies

34
Q

Usually Spherical in shape:
○ There are different sizes
○ Highly refractile
○ No internal organs

A

Fat globules

35
Q

This is usually present in the stool due to malabsorption or pancreatic deficiency

A

Fat Globules

36
Q

Fecal artifact that may be confused as protozoan cyst

A

Fat globules

37
Q

excess fecal
fat is called?

A

steatorrhea

38
Q

T/F Excess fecal fat may cause Giardia Duodenalis

A

True

39
Q

What fecal artifact is being described
● Rectangular in shape
● With or without striations
● Normally present especially in high red-meat diet

A

Muscle fiber

40
Q

Presence of too much muscle fiber

A

creatorrhea

41
Q

Fecal artifact that may be confused as tapeworm proglottid

A

Muscle fiber

42
Q

Seen in improperly prepared wet mounts/smear

A

Air bubbles

43
Q

found in the stool usually indicates an infection

A

White blood cells

44
Q

Fecal artifact that can be mistaken as Entamoeba Histolytica/E. Dispar (cysts)

A

White blood cells

45
Q

These are formed from the break-down products of eosinophils

A

Charcot Leydan Crystals

46
Q

● Slender crystals with pointed ends “diamond-shaped”
● Stain red-purple with trichrome stain

A

Charcot Leydan Crystals

47
Q

May indicate hypersensitivity/allergic reaction and parasitic helminth infections

A

Charcot Leydan Crystals

48
Q

Fecal artifact that may be confused with amebic trophozoites

A

Epithelial Cells

49
Q

From anal mucosa

A

Squamous epithelial cells

50
Q

H

How to distinguis epithlieal cell from amecbic trophozoites

A

it lacks interior structures of amebic trophozoites and it is with a large, refractile nucleus, with distinct cell border

51
Q

From intestinal mucosa

A

Columnar epithelial cells

parasitology (2 decks)

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