INTESTINAL AND ATRIAL AMEBAE Flashcards
- only pathogenic and invasive intestinal and atrial amebae.
-CYST: 10-20 um and spherical with 1-4 nuclei
TROPHOZOITES: Bull`s eye karyosome
- ingest RBCs
Entamoeba histolytica
- also known as MASHKOVSKII and BANGLADESH
- identical to E. histolytica but NON PATHOGENIC
-CYST: 10-20 um and spherical with 1-4 nuclei
Entamoeba dispar
- small race of E. histolytica
- CYST: 5-10 um and spherical
Entamoeba hartmanni
Elongate bars with bluntly rounded
ends described as CIGAR SHAPED
Entamoeba histolytica
Entamoeba dispar
Entamoeba hartmanni
- CYST: 10-33 um; spherical or oval & up to 8 nuclei (mature cyst)
TROPHOZOITES: 10-50um.
K: Large and eccentric &
PC: Irregular and coarse
Entamoeba coli
- “cross-eyed cyst”; Dward internal slug trophozoites
CYST: 5-14 um; oval; with 4 nuclei
TROPHOZOITES: 6-15um with K: large, irregular; blot like
Endolimax nana
- uninucelated; large glycogen mass and IODOPHILIC
CYST: 5-18um, irregular with 1 nuclei
TROPHOZOITES: 6-20 um with “basket nucleus” and karyosome is central or peripheral surrounded with ACHROMATIC granules
Iodamoeba butschlii
- ingest WBC
NO CYST
TROPHOZOITES: 10-20um / K: central and distinc
Entamoeba gingivalis
- uninucleated
- parasite ofpigs and monkeys
-NON IODOPHILIC
Entamoeba polecki
trophozoites is found in liquid stool that undergoes ____
Binary fission
cyst is found in formed stool that undergoes ____
Encystation
incubation period of TWO to FIVE days; presents with bloody diarrhea and abdominal pain
Acute/ symptomatic
patients are considered as CARRIERS or CYST PASSERS ; stool is soft to well-formed
Chronic/ asymptomatic
Extraintestinal Amebiasis
Most common site ___________; may hematogenously spread to other organs
Liver
Carcinoma or tumor like mass of granulomatous tissue
Amoeboma
Carcinoma or tumor like mass of granulomatous tissue
Amoeboma
Produces HYALURONUDASE (flask shaped ulcers)
Amoebic ulcers
Harbors the pathogenic parasites WITHOUT manifesting signs & symptoms and SHED INFECTIVE forms that may cause infection to other susceptible individuals
Carriers or cyst passers
