UAMS Parasitology Exam 3 Questions & Answers 2024/2025
Cyst - resistant, transmissible, and non motile
Excystation - escapes from cyst after being swallowed by host
Trophozoite - growth and feeding stage, reproductive stage, motile, and sometimes transmissible - ANSWERSWhat are the 3 stages...
Excystation - escapes from cyst after being swallowed by host
Trophozoite - growth and feeding stage, reproductive stage, motile, and sometimes transmissible -
ANSWERSWhat are the 3 stages of the life cycle of amoebae and ciliates?
Cyst - ANSWERSIdentify which stage of the amoebae life cycle
Trophozoite - ANSWERSIdentify which stage of the amoebae life cycle
Binary fission - ANSWERSHow do amoebae and ciliates reproduce?
Entomoeba histolytica - ANSWERSWhich amoebae species cyst phase has smooth and even chromatin,
small and central karyosome, and rounded chromatoidal bars?
E. histolytica - ANSWERSIdentify species and life cycle stage
E. histolytica - ANSWERSWhich amoebae species trophozoite phase has smooth and even chromatin,
small and central karyosome, ingested RBCs in the cytoplasm, and has purposeful motility?
E. histolytica trophozoite. Hallmark feature is ingested RBCs. - ANSWERSIdentify species and life cycle
stage
E. dispar - ANSWERSWhat is E. histolytica morphologically identical to unless there are ingested RBCs?
, Infective stage - cyst, method of infection - ingest cyst through contaminated food, water, fomite, or
sexual transmission, diagnostic stage - cyst or trophozoite, and method of diagnosis - identify cyst or
trophozoite in feces or identify with serology or PCR.
Cyst seen in formed feces, while trophozoite seen in diarrhea because it has motility and can move
around. - ANSWERSWhat is the life cycle of E. histolytica?
Amebic dysentery - extreme GI symptoms with diarrhea that can lead to death due to water loss.
Extraintestinal amebiasis - can move out of the intestines into other organs - ANSWERSWhat diseases is
E. histolytica capable of causing?
E. hartmanni - ANSWERSWhat is the one of the non pathogenic amoebae that is identical to E. histolytica
but smaller?
E. hartmanni cyst - ANSWERSIdentify amoebae species and phase.
E. hartmanni trophozoite - ANSWERSIdentify amoaebae species and phase.
E. hartmanni has sluggish motility and is slightly smaller, while E. histolytica has purposeful motility and
is a little larger. - ANSWERSHow does the E. hartmanni trophozoite differ from E. histolytica trophozoite?
E. coli - ANSWERSWhat amoebae species is non pathogenic that shares a name identical to a bacterium?
E. coli. - ANSWERSWhat amoebae species and phase has bumpy and uneven chromatin, small and
eccentric karyosome, and splintered chromatoidal bars?
E. coli - ANSWERSWhat amoebae species and phase has bumpy and uneven chromatin, small and
eccentric karyosome, and vacuolated cytoplasm?
E. coli cyst. Hallmark feature is 1-8 nuclei. - ANSWERSIdentify species and stage.
E. coli trophozoite. Hallmark feature is vacuolated cytoplasm. - ANSWERSIdentify species and stage.
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