Intestinal amoeba, commensals, and blastocytstis Flashcards
Only pathogenic amoeba species
E. histolytica
The ____ of E. histolytica extends as it moves
Cytoplasm
Diagnostic and infective stage of E. histolytica
Cysts and trophozoites
Trophozoites of E. histolytica will divide by undergoing fission in the ____
small intestine
The amoeba will undergo encystation in the _____
Large intestine
Entamoeba could cause:
○ Exointestinal disease
○ Hepatic liver amoebiasis
○ Brain abscess/ invade the brain
○ Skin ulceration / skin amoebiasis-previously
studied
E. histolytica and E. dispar can only be distinguished via ____
PCR
TRUE OR FALSE: E. dispar is pathogenic
FALSE
This serve as a prominent evidence of invasion in E. hemolytica trophozoite
Ingested RBCs in the cytoplasm
The nucleus of E. histolytica trophozoite has a ____
centrally-located karyosome
E. histolytica caused the ____ ulcer
flask-shaped
Virulence factors of E. histolytica
○ Gal/GalNAc (adherence) lectin- allows the
trophozoite to attach to the mucosal cells
○ Amebapore (pore-forming protein)- causes cell lysis
○ Cysteine proteinases- break down protein
Interval of stool exam for E. histolytica
3 exams at 1 week
Concentration methods for E. histolytica
FECT and MIFC
the presence or absence of the band will be checked here to determine between E. histolytica and E. dispar
Agarose gel electrophoresis
Amoebiasis is the ____ parasitic disease causing death worldwide
A. 1st
B. 2nd
C. 3rd
C
Biggest among the non-pathogenic amoeba
E. coli
The cyst of E. coli has ___ nuclei
8
TRUE OR FALSE: Food vacuole is absent in E. coli cyst
True
smallest amoeba
E. nana
E. nana lives in the ____
cecum
Mature cyst of E. nana has __ nuclei
4
Which is more susceptible to dessication?
A. E. nana cyst
B. E. coli cyst
Only species of the genus Iodamoeba
Iodamoeba buetschlii
Mature cyst of Iodamoeba buetschlii has ___ nucleus
1
Enteric protozoan of humans and animals
Blastocystis
Blastocystis is a classified member of ____
Stramenopiles
Different forms of blastocystis
- Vacuolar cyst
- Granular form with central vacuole
- Amoeboid
Blastocystis subtype 2 commonly occur in
pigs and primates
Blastocystis subtype 1 commonly occur in
pigs, roosters, primates
Blastocystis subtype 6 and 7 commonly occur in
fowl
Blastocystis subtype 4 commonly occur in
Rodents
Blastocystis subtype 5 commonly occur in
Pigs
TRUE OR FALSE: Blastocystis is zoonotic
True
