FECAL ARTIFACTS

Question 1

Feces contain various components including

Answer 1

undigested food, digestive by- products, human cells, secretion from digestive tract, microorganisms

Question 2

rounded or angular when seen in fecal samples, no internal structures and will stain pink to purple in iodine mounts

Answer 2

starch granules

Question 3

epithelial cells show close resemblance to amebic trophozoites in size and shape

Answer 3

True

Question 4

yeast are generally harmless, but may be associated with fungal infection

Answer 4

True

Question 5

pollen grains may mimic helminth larvae

Answer 5

false (helminth eggs)

Question 6

common findings in giardiasis and other parasitic infections causing malabsorption. it appears to be round with thin circular lining

Answer 6

fat globules

Question 7

this artifact resembles taenia and other helminth eggs, it has little to no internal structures and lacks 6-hookes oncosphere and embryo wall.

Answer 7

pollen

Question 8

ladder-like appearance and lacks head or tail region. it may be confused with helminth larvae because of size and shape and resembles a tapeworm and cestode

Answer 8

Vegetable spiral

Question 9

this is larger in size compared to helminth eggs, polygonal and flattened. its inner is unorganized and contain large vacuole and it resembles the hookworm ova and ancylostoma vaninum

Answer 9

vegetable cells

Question 10

lacks internal structure and refractile inner structures

Answer 10

Plant hair/fiber

Question 11

round to oval shape and may be confused with: crytosporidium, cyclospora spp., microsporidia, helminth eggs or protozoan cyst

Answer 11

yeast

Question 12

protistan parasites of crayfish and resemble helminth ova

Answer 12

corpora parasitica or beaver bodies

Question 13

round to irregular round- shaped, no internal structures or nucleus, it resembles entamoeba hartmanni and entamoeba nana, common in babies with lactose intolerance

Answer 13

Starch cells/granules

Question 14

spherical in shape, resemble protozoan cyst and contain large amount that may indicate presence of excess fecal fat

Answer 14

Fat globules

Question 15

if the size is less than 10um then it is called

Answer 15

starch granules

Question 16

fat in the intestine that cannot be absorbed kaya sumasama sa stool, seen in patients with giardia duodenalis

Answer 16

steatorrhea

Question 17

rectangular in shape, normally present especially in high red-meat diet, may be confused with tapeowrm proglottid

Answer 17

Muscle fiber

Question 18

presence of too much muscle fibers

Answer 18

creatorrhea

Question 19

seen in improperly prepared wet mounts/smear, irregular in shape

Answer 19

air bubbles

Question 20

these are formed from the break down products of eosinophil that is seen in stool or sputum, slender crystals with pointed ends as diamond shaped

Answer 20

charcot leyden crystals

Question 21

with a large, refractile nucleus with distinct cell borders and looks like amebic trophozoites, seen as squamous epithelial cells (anal mucosa) and columnar epithelial cells (intestinal mucosa)

Answer 21

epthelial cells

Question 22

average size 14um, ratio of nuclear material to cytoplasm is 1:1 and nucleus has 2 to 4 segments with short chromatin bands, granular cytoplasm

Answer 22

PMNs

Question 23

has an average size of 20um and its ration of nuclear material to cytoplasm is 1:10 to 1:12 (trophozoite) 1:2 to 1:3 (cyst), nucleus is round with central karyosome and peripheral chromatin, uniform, agranular cytoplasm that may contain rbcs

Answer 23

E. histolytica/E.dispar (cysts)

Question 24

size 12 to 60 um but average 20um ratio of nuclear material to cytoplasm is 1:10 to 1:12

Answer 24

E. histolytica/E. dispar (trophozoite)

Question 25

size is 30 to 60 um ratio of nuclear material to cytoplasm is 1:4 to 1:6 usually contains ingested debris, described as a one large nucleus that may be irregular in shape like monocyte nucleus

Answer 25

macrophages

Question 26

vegetable spirals resembles ——— due to its size and shape

Answer 26

helminth larvae