protozoa amoeba

Question 1

• Motile
• Reproducing
• Feeding stage

Answer 1

trophozoite

Question 2

• Non-motile
• Nonfeeding stage
• Infective stage to
  humans

Answer 2

cysts

Question 3

• Cause dysentery

Answer 3

Entamoeba histolytica

Question 3

Transmission of
amebae is generally by

Answer 3

ingestion of cysts in
fecally contaminated
food or water.

Question 4

*Nucleus has karyosome (endosome)

Answer 4

Entamoeba histolytica

Question 5

Mostly with RBC in cytoplasm

Answer 5

Entamoeba histolytica

Question 6

• Cyst
• With chromatoid bars (rounded)

Answer 6

Entamoeba histolytica

Question 7

amebiasis stage

Answer 7

cysts and trophozoite passed in feces
mature cysts ingested
excystation
trophozoite
multiplication
cyst or trophozoites
exits host

Question 8

• Nonpathogenic
• Size: cyst = < 10um, trophozoite = < 12 um

Answer 8

Entamoeba hartmanni

Question 9

*Cysts and trophozoites are morphologically
identical to E. histolytica

Answer 9

Entamoeba dispar

Question 10

noninvasive

Answer 10

Entamoeba dispar

Question 11

never ingests RBCs

Answer 11

Entamoeba dispar

Question 12

Flask-shaped ulcerations of the intestinal wall and bloody
dysentery

Answer 12

pathology of E.histolytica

Question 13

If amebae penetrate the intestinal wall and spread via
blood,

Answer 13

ulceration may occur in the liver, lungs, brain, or other
tissues.

pathology of E.histolytica

Question 14

are most common and lung invasion usually
results from erosion of the liver abscess

Answer 14

• Liver abscesses

Question 15

Any of these extraintestinal infections can be fatal.

Answer 15

pathology of E.histolytica

Question 16

Transmission (Entamoeba histolytica)

• The infection can be transmitted sexually by

Answer 16

homosexual males

Question 17

Transmission (Entamoeba histolytica)

one cause of the disease known a

Answer 17

“gay bowel syndrome.”

Question 18

• Nonpathogenic
• Commonly confused with E. histolytica

Answer 18

Entamoeba coli

Question 19

large eccentric karyosome

Answer 19

nucleus

e.coli

Question 20

irregular peripheral chromatin clumping along the nuclear membrane

Answer 20

nucleus

e.coli

Question 21

granular cytoplasm

Answer 21

trophozoite

e.coli

Question 22

ingested bacteria but not RBCs.

Answer 22

trophozoite

e.coli

Question 23

the pseudopods

e.coli

Answer 23

blunt

Question 23

Motility in e.coli

Answer 23

sluggish

Question 24

up to 8 nuclei * Chromatoid bars (splintered or pointed ends)

Answer 24

cyst stage e.coli

Question 25

* nonpathogenic * found primarily in pigs and monkeys * Occasionally in humans

Answer 25

Entamoeba polecki

Question 26

resembles both E. histolytica and E. coli morphologically

Answer 26

Entamoeba polecki

Question 27

* large glycogen

Answer 27

“inclusion mass”

Question 27

* no cyst stage

Answer 27

Entamoeba gingivalis

Question 27

usually 1 in mature cysts * large glycogen “inclusion mass” * Chromatoid bodies (abundant and are pointed)

Answer 27

nucleus Entamoeba polecki

Question 27

Nonpathogenic *found in: * mouth in soft tartar between teeth or in tonsillar crypts * Occasionally in sputum

Answer 27

Entamoeba gingivalis

Question 28

* only species to ingest white blood cells. * (fragments in large vacuole)

Answer 28

Entamoeba gingivalis