Amoeba

Question 1

In amoeba, the basis of differentiation is?

Answer 1

size & structure

Question 2

Amoebic trophozoites — divide by

Answer 2

binary fission

Question 3

— most go thru nuclear division => divide again after excystation in a new host

Answer 3

cyst

Question 4

Pathogenic amoeba in humans

Answer 4

Entamoeba histolytica

Question 5

There are _____ spp of amoebae occuring in humans:

Answer 5

7

Question 6

Entamoeba spp that are commensals to humans are:

Answer 6

E. dispar

E. moschkovskii

E. hartmanni

E. coli

Endolimax nana Iodomoeba butschlii

Entamoeba polecki

Question 7

formerly referred to as “small race” of E. histolytica

Answer 7

E. hartmanni

Question 8

• intestinal ameba of pigs and monkeys
• occassionally detected in humans
• a probable cause of diarrhea

——————————————————————

Answer 8

E. polecki

Question 9

Hierarchical Classification of Entamoeba histolytica

Answer 9

subphylum Sarcodina, 
superclass Rhizopoda, 
class Lobosea,
order Amoebida, 
family Entamoebeidae, 
genus Entamoeba

Question 10

Characteristics of E.histolytica

Answer 10

• vesicular nucleus
• centrally-located karyosome
• chromatin granules adhering to nuclear membrane

Question 11

Entamoeba histolytica has same morphology & size to:

Answer 11

• E. histolytica
• E. dispar
• E. moshkovskii — previously known as Laredo strain

Question 12

Entamoeba sp that is — previously known as Laredo strain

Answer 12

E. moshkovskii

Question 13

Different ameoba spp can be differentiated thru

Answer 13

• PCR
• restriction fragment length polymorphism (RFLP)
• typing with monoclonal Abs

Question 14

pseudopod-forming nonflagellated protozoan parasite

Answer 14

Amoebae

Question 15

the most invasive of the entamoeba parasites

• only member of the family to cause colitis & liver abscess

Answer 15

Entamoeba histolytica

Question 16

2 stages of life cycle of Entamoeba

Answer 16

Infective Cysts

Invasive Trophozoites