fecal artifacts

Question 1

feces contains what components

Answer 1

undigested food
digestive byproducts
human cells
secretions from the digestive tract
microorganisms

Question 2

what are confusers

Answer 2

artifacts in human samples that are responsible for incorrect identification

Question 3

may be confused with helminth eggs but are bigger than them; interior is unorganized and contains large vacuoles

Answer 3

vegetable cells

Question 4

resembles taenia; little to no internal structures

Answer 4

pollen

Question 5

polygonal and flattened

Answer 5

vegetable cell

Question 6

lacks 6-hooked oncosphere and lacks embryo wall

Answer 6

pollen

Question 7

may be confused with helminth larvae such as hookworms and strongyloides because of shape and size; no head or tail region

Answer 7

plant hair/fiber

Question 8

ladder like appearance

Answer 8

vegetable spiral

Question 9

refractile center; broken at one end; lacks internal structures

Answer 9

plant hair/fiber

Question 10

confused with helminth larva due to size and shape; no head or tail region

Answer 10

vegetable spiral

Question 11

may be confused with cryptosporidium spp., cyclospora spp, microsporidia, helminth eggs, or protozoan cysts

Answer 11

yeast

Question 12

round to irregular round-shape; very refractile

Answer 12

starch cells/ granules

Question 13

round to oval shape ~4-8um in size; normally present in stool hence reporting is not necessary

Answer 13

yeast

Question 14

no internal structure or nucleus and can resemble protozoan cysts e. hartmanni and e. nana

Answer 14

starch cells/ granules

Question 15

undigested starch is what color in iodine staining

Answer 15

blue-black

Question 16

partially digested starch is what color in iodine staining

Answer 16

red/pink

Question 17

spherical in shape and resembles protozoan cysts

Answer 17

fat globules

Question 18

protistan parasites of crayfish; corpora parasitica

Answer 18

beaver bodies

Question 19

large amount of this can indicate steatorrhea

Answer 19

fat globules

Question 20

present in stool if crayfish is consumed in significant amounts; resemble helminth ova; no clinical significance

Answer 20

beaver bodies

Question 21

how many droplets of fat is normal in samples

Answer 21

100 small droplets, <4 um in diameter

Question 22

how can you tell if it is steatorrhea already

Answer 22

observation of >60 large, 6-75um large droplets per HPO

Question 23

seen in improperly prepared wet mounts/ slides

Answer 23

air bubbles

Question 24

rectangular in shape; can or cannot have striations

Answer 24

muscle fiber

Question 25

normally present in high red-meat diet; too much of this is creatorrhea

Answer 25

muscle fibers

Question 26

muscle fiber in not normal in high amounts in what circumstances

Answer 26

biliary obstruction and gastrocolic fistulas; pancreatic insufficiency; cystic fibrosis

Question 27

can be confused with tapeworm proglottid

Answer 27

muscle fibers

Question 28

formed from the breakdown products of eosinophils

Answer 28

charcot-leyden crystals

Question 29

large refractile nucleus with distinct cell borders

Answer 29

epithelial cells (squamous from anal mucosa and columnar from intestinal mucosa)

Question 30

look like amoebic trophozoites
lack internal structures of amoebic trophozoites

Answer 30

epithelial cells (squamous from anal mucosa and columnar from intestinal mucosa)

Question 31

seen in stool or sputum
slender crystals with pointed ends
diamond shaped

Answer 31

charcot-leyden crystals

Question 32

stain red-purple in trichrome stain

Answer 32

charcot-leyden crystals

Question 33

if charcot-leyden crystals is seen, how is it reported

Answer 33

charcot-leyden crystal present

Question 34

may indicate hypersensitivity or allergic reactions and parasitic helminth infections

Answer 34

charcot-leyden crystals

Question 35

squamous epithelial cells from anal mucosa and columnar epithelial cells from intestinal mucosa

Answer 35

epithelial cells

Question 36

what kind of nucleus and cell borders do epithelial cells have?

Answer 36

large refractile nucleus and distinct cell borders

Question 37

what do epithelial cells look like?

Answer 37

amoebic trophozoites

Question 38

what do epithelial cells lack?

Answer 38

lack the typical interior structures of amoebic trophozoites