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Amebae Transmission and Infection Routes in Humans

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Amebae Transmission and Infection Routes in Humans

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Questions and Answers

Which stage of the Ameba carries the infection into humans?

Both Cysts and Trophozoites

Acanthapodia

Cysts

Trophozoites (correct)

What is the diagnostic stage for Amebic infections in tissues?

Trophozoites

Spine-like pseudopodia

Cysts (correct)

Acanthapodia

Which characteristic is unique to Trophozoites of Amebae?

Annular infiltration in the cornea

Single and large nucleus

Isolation of organism from contact lens

Polydirectional movement (correct)

Which characteristic is unique to Naegleria fowleri trophozoites?

Cytoplasm with pointed ends (splinter-like) Signup and view all the answers

What distinguishes the cyst stage of Naegleria fowleri from other amoebae?

Spherical shape with jagged ends in the cytoplasm Signup and view all the answers

How does Naegleria fowleri cause Primary Amebic Meningoencephalitis (PAM) in healthy individuals?

By migrating to the brain via the Olfactory Nerves Signup and view all the answers

Which Entamoeba species is known to cause colitis and liver abscess?

Entamoeba histolytica Signup and view all the answers

What is the morphological characteristic that distinguishes Entamoeba histolytica from Entamoeba dispar and Entamoeba moshkovskii?

Lack of chromatin granules adhering to the nuclear membrane Signup and view all the answers

How are trophozoites of Entamoeba histolytica different from cysts?

Trophozoites multiply in the large intestine by binary fission Signup and view all the answers

How can Entamoeba species be differentiated using diagnostic methods?

Isoenzyme analysis, PCR, and RFLP Signup and view all the answers