FREE-LIVING AMEBAE

Question 1

trophozoite stage can transform into a flagellate stage or a resistant cyst

Answer 1

Naegleria fowleri

Question 2

opportunistic free-living amoebae which include A. castellanii, A. culbertsoni, A.
polyphaga, A. hatchetti, and A. rhysodes

Answer 2

Acanthamoeba spp.

Question 3

morphologically similar to Acanthamoeba and is an additional opportunistic agent

Answer 3

Balamuthia mandrillaris

Question 4

rare cause of meningoencephalitis

Answer 4

Sappinia spp.

Question 5

Cyst of Naegleria fowleri is

• ___ present in tissue
• double walled with ____

Answer 5

NOT present in tissue = NO CYSTS

double walled with SMOOTH OUTER WALL

Question 6

Cyst of Acanthamoeba spp is

• ___ present in tissue
• double walled with ____

Answer 6

present in tissue = SEEN WITH CYSTS

double walled with WRINKLED OUTER WALL

Question 7

TROPHOZOITE of Naegleria fowleri is BIPHASIC

1. Amoeboid form has ____
2. Flagellate form has ____

Answer 7

1. lobate pseudopods
2. 2 anterior flagella= rapidly motile

Question 8

TROPHOZOITE of Acanthamoeba spp

1. characterized by ____
2. with or without flagellate?

Answer 8

1. SPINX or Filiform
2. WITHOUT = slowly motile

Question 9

Diagnostic Stage of

1. N. fowleri
2. Acanthamoeba spp

Answer 9

1. Troph (A&E)
2. Cyst and Trophozoites

Question 10

DISEASE/S CAUSED

1. N. fowleri
2. Acanthamoeba spp

Answer 10

1. PAM = Primary Amoebic Meningoencephalitis (acute)
2. GAM = Granulomatous Amoebic Meningoencephaltiis