Giardia and Entamoeba

Question 1

How many Giardia cysts is required to produce a disease?

Answer 1

10

Question 2

Giardia resides in the intestine of which species?

Answer 2

Man
Pigs
Monkeys

Question 3

Name the Giardia spp observed to be associated with humans

Answer 3

Giardia lamblia
Giardia duodenalis
Giardia intestinalis
Giardia enteric

Question 4

Name the Giardia spp present in mice

Answer 4

Giardia muris

Question 5

Name the Giardia spp present in amphibians

Answer 5

G. agilis

Question 6

Name the Giardia spp present in birds

Answer 6

G. psittaci

Question 7

Assemblages A and B of Giardia spp are considered to be mainly found in which species?

Answer 7

Humans
Dogs
Cats

Question 8

Assemblages C and D of Giardia spp are considered to be mainly found in which species?

Answer 8

Dogs

Question 9

Assemblage E makes up the group most typically found in which species?

Answer 9

hoofed stock

Question 10

Assemblage F of Giardia spp are considered to be mainly found in which species?

Answer 10

cats

Question 11

Assemblage G of Giardia spp represents the form from?

Answer 11

Rats

Question 12

Giadia trophozoites are adapted for attachments for?

Answer 12

Mucous epithelial cells of the small intestine

Question 13

Refers to the resistant forms and are responsible for transmission of giardiasis

Answer 13

Cysts

Question 14

Where does giardia excystation occur?

Answer 14

small intestine

Question 15

Where does Giardia trophozoites multiply and remain freely attached

Answer 15

Lumen of proximal small bowel

Question 16

Encystation of giardia occurs as the parasites transit toward the?

Answer 16

colon

Question 17

It is shape like a teardrop, with one side pushed in to form a sucking disc.

Answer 17

Giardia trophozoite

Question 18

Giardia spp generally invades the?

Answer 18

small intestine

Question 19

Giardia trophozoites usually form this before passing out in the feces?

Answer 19

Infective cysts

Question 20

In cats, Giardia trophozoites are found in the?

Answer 20

jejunum and ileum

Question 21

Give the causative agent of amoebic meningoencephalitis induced through intranasal route.

Answer 21

Naegleria fowleri

Question 22

Produce meningoencephalitis primarily in mice and monkey but man may also be affected if introduced intranasally

Answer 22

Acanthamoeba culbertsoni

Question 23

A well recognized pathogenic amoeba, associated with intestinal and extra intestinal infections

Answer 23

Entamoeba histolytica

Question 24

Amebiasis is transmitted by ingestion of mature?

Answer 24

Tetranucleate cyst

Question 25

risk groups include male homosexuals, travelers and recent immigrants

Answer 25

Amebiasis

Question 26

Produce chronic keratitis among contact lens users

Answer 26

Acanthamoeba culbertsoni

Question 27

Principally a parasite of the large intestine and cause amoebic dysentery in humans

Answer 27

Entamoeba histolytica

Question 28

Clinical manifestation of Amebiasis

Answer 28

1. Enteritis with persistent dysentery but may be asymptomatic 2. Excessive mucus and blood appearing in the feces 3. Defecation with straining 4. General abdominal pain and discomfort

Question 29

Excystation of E. histolytica occurs in

Answer 29

small intestines

Question 30

After excystation of E. histolytica, it migrates to ____ to multiply by binary fission

Answer 30

large intestine (colon)

Question 31

Extraintestinal disease of Entamoeba histolytica affects

Answer 31

liver, lungs, brain

Question 32

The spectrum of amebic infection can range from a lack of noticeable symptoms, also known as?

Answer 32

luminal amebiasis

Question 33

What are the three possible possible manifestations of amebiasis?

Answer 33

1. Luminal amebiasis 2. Invasive intestinal amebiasis 3. Invasive extraintestinal amebiasis

Question 34

Cysts and trophozoites of Entamoeba histolytica are passed in feces, which of the two are found in formed stool?

Answer 34

Cysts

Question 35

Which life stage of Entamoeba histolytica are typically found in diarrheal stool?

Answer 35

Trophozoites

Question 36

Which Entamoeba spp have noninvasive forms?

Answer 36

Entamoeba dispar