Intestinal Protozoa - ENTAMOEBA HISTOLYTICA

Question 1

Most invasive parasite among Entamoeba

Answer 1

Entamoeba histolytica

*eukaryotic organism that LACKS membrane bound organelles

Question 2

Infective stage of E. histolytica

Answer 2

mature cysts

Question 3

Found in DIARRHEAL STOOLS and within the INTESTINAL and EXTRAINTESTINAL lesions

Answer 3

TROPHOZOITE

Question 4

Characteristically contain INGESTED RBCs (erythrophagocytosis) – HEMATOPHAGOUS

Answer 4

Trophoizoite

Question 5

Predominates in NON-DIARRHEAL STOOLS

Answer 5

CYST

• smaller than E. coli
• has 4 nuclei

Question 6

Mediates ADHERENCE

Answer 6

Lectin

Question 7

For PENETRATION

Answer 7

Amebapores

Question 8

For CYTOPATHIC EFFECT

Answer 8

Cysteine Proteases

Question 9

Dysentery WITHOUT fever

FLASK SHAPED colon ulcer

Answer 9

Amebic colitis

Question 10

granulomatous lesion that may form in the CECAL or RECROSIGMOID areas

associated w/ dysentery

Answer 10

AMEBOMA

Question 11

MC EXTRAINTESTINAL FORM

usually in the POSTEROSUPERIOR ASPECT of the RIGHT lobe

ANCHOVY PASTE LIKE ASPIRATE

Answer 11

Amebic Liver Abscess

Question 12

Treatment for Asymptomatic Cyst Carrier State

Answer 12

Diloxanide Furoate - DOC
Iodoquinol
Paromomycin

Question 13

Treatment for Amebic Colitis

Answer 13

Metronidazole
Tinidazole
Diloxanide furoate
Paromomycin

Question 14

Treatment for Amebic Liver Disease

Answer 14

Metronidazole
Tinidazole
Percutaneous drainage for nonresponders

Question 15

TISSUE AMEBICIDES

act on organisms in the BOWEL WALL and LIVER

Answer 15

Chloroquine
Emetines
Metronidazole
Tinidazole

Question 16

LUMINAL AMEBICIDES

act only in the LUMEN of the bowel

Answer 16

Diloxanide furoate
Iodoquinol
Paromomycin