3. Protozoa (I) Flashcards
Disease caused by E. histolytica
Amoebic dysentery (amoebiasis)
IS of E. histolytica
Cysts
DS of E. histolytica
Cysts
Trophozoites
Number of nuclei of E. histolytica cysts
1-4 nuclei
Diagnostic characteristic for E. histolytica trophozoites
Ingested RBCs
Nonpathogenic protozoan identical to E. histolytica
Entamoeba dispar
DS of Entamoeba coli
Cysts
Trophozoites
Characteristic of E. coli cysts that differentiate it from E. histolytica
More than 4 nuclei (1-8 nuclei normally)
Known as “small race” E. histolytica
Entamoeba hartmanni
DS of E. hartmanni
Cysts
Trophozoites
Protozoan with blot-like karyosome in both cyst and trophozoite stages
Endolimax nana
DS of E. nana
Cysts
Trophozoites
Protozoan with “basket of flowers”-shaped nucleus in cyst form
Iodameoba bütschlii
Protozoan that stains well with iodine
Iodamoeba bütschlii
DS of I. bütschlii
Cysts (recognizable glycogen mass using iodine stain)
Trophozoites
Protozoan that causes granulomatous amoebic encephalitis (GAE)
Acanthamoeba spp.
Protozoan that causes primary amoebic meningoencephalitis (PAM)
Naegleria fowleri
Protozoan with a double cell-walled cyst form
Acanthamoeba spp.
Disease caused by Acanthamoeba spp.
Granulomatous amoebic encephalitis (GAE)
Disease caused by N. fowleri
Primary amoebic meningoencephalitis (PAM)
Protozoans with no known cyst form
N. fowleri
D. fragilis
T. hominis
T. vaginalis
The only amoeba with 3 known morphologic forms
N. fowleri:
- ameboid trophozoites (only form to exist in humans)
- flagellates
- cysts
True/False. N. fowleri can be free living.
True
Causes Traveler’s diarrhea
Giardia lamblia
Other names of G. lamblia
G. intestinalis
G. duodenalis
IS of G. lamblia
Cysts
DS of G. lamblia
Cysts
Trophozoites
Has trophozoites with sucking disk
G. lamblia
Associated with E. vermicularis infections; may be transmitted via the eggs of helminth parasites
Dientamoeba fragilis
IS of D. fragilis
Trophozoites
Trophozoite has spiral groove
Chilomastix mesnili
DS of C. mesnili
Cysts
Trophozoites
Trophozoite has costa
Trichomonas hominis
DS of T. hominis
Trophozoites
Jerky motility of trophozoites
Trichomonas vaginalis
IS of T. vaginalis
Trophozoites
DS of T. vaginalis
Trophozoites
The only amoeba pathogenic to the GI tract
Entamoeba histolytica