9aM Infection is common in developing countries where sanitation is poor
Infection is common in developing countries where sanitation is poor
Amoeba in alimentary tract ● Entamoeba E histolytica(pathogenic) E dispar(non-pathogenic) -E,Co∥( big sister) E. hartman(little brother E. gingivalis (oral) o Endolimax nana(occasionally pathogenic E o Iodamoeba butschlii
Amoeba in alimentary tract • Entamoeba – E. histolytica (pathogenic) – E. dispar (non-pathogenic) – E. coli (big sister) – E. hartmani (little brother) – E. gingivalis (oral) • Endolimax nana (occasionally pathogenic) • Iodamoeba butschlii
Morphology Entamoeba histolytica Cysts Trophozoites Thick wall Plasmalemma(thin 1-4 ring -like nuclei 1 ring-like nucleus Chromatoid body (blunt) Lacking Round 10-16 um Irregular, 10-60 um Concentratable Labile
Morphology Entamoeba histolytica Cysts Trophozoites Thick wall Plasmalemma (thin) 1-4 ring-like nuclei 1 ring-like nucleus Chromatoid body (blunt) Lacking Round, 10-16 μm Irregular, 10-60 μm Concentratable Labile
Morphology Ingested Endoplasm RBC Ectoplasm Nucleus with central karyosome and finely divided chromati granules Pseudopod E histolytica trophozoite
Morphology Ingested RBC Nucleus with central karyosome and finely divided chromatin granules Pseudopod E. histolytica trophozoite Ectoplasma Endoplasma
Morphology ③) 界P Three Entamoeba histolytica trophozoites, two with ingested RBCs (arrows) Trophozoites Single nucleus with a central dot-like karyosome
Single nucleus with a central, dot-like karyosome Morphology Trophozoites