7.19 Gastrointestinal Protozoans Flashcards Preview

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Flashcards in 7.19 Gastrointestinal Protozoans Deck (20)
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1

Causative agent for amebiasis

Entamoeba histolytica

2

Natural hosts of E. histolytica

Primates

3

Most common manifestations of invasive amebiasis

Amebic colitis

4

Most common manifestation of extra-intestinal invasive amebiasis

Amebic liver abscess

5

Infective stage of E. histolytica

Ingestion of the cystic form

6

Excystation of E. histolytica occurs in

Terminal ileum

7

Mediates the adherence stage of trophozoites to colonic epithelial cells

Galactose/N-acteylgalactosamine specific lectin

8

Molecules seen on trophozoites, conferring protection form MAC

CD59/protectin-like

9

Peptides capable of forming pores in lipid bilayers

Amebapores

10

Directly implicated in invasion and inflammation of the gut
May amplify IL-1

Cysteine proteases

11

Most common metastatic complication of amebiasis
Anchovy sauce

Amebic liver abscess

12

2nd common site of amebiasis (direct, hematogenous)

Lung

13

Amebiasis second only to _____ in terms of protozoa-associated mortality

Malaria

14

E. histolytica can be differentiated from E. dispar by:

Isoenzyme analysis
Restriction fragment polymorphism
Monoclonal Abs

15

Overdiagnosis of E. histolytica due to sharing common morphological characteristics with the following

E. dispar
E. coli
E. hartmanii
Endolimax nana
Iodameba buetschlii

16

TOC invasive amebiasis

Metronidazole

17

TOC asymptomatic amebiasis

Luminal agent (iodoquimol, paromomycin, dioxanide defuroate

18

Amebic colitis

Metronidazole then luminal agents

19

Prevention and control for amebiasis

WASH

20

Food handler's education and screening

Sanitation code of Philippines (PD 856)