+
Related Topics
Cards In This Set
| Front | Back |
|
Based on history what are some of the alerts that E.histolyticca cause"?
|
- over 100000 deaths per year
- 500 million people infected at once
-was injected into dos- which showed numerous ulcerations
-infected alot of persons in world war II and Vetnam
|
|
How much sizes does E.histolytica operate in?
|
2.
small and large
they both have trophozoites and cysts.
|
|
Do both sizes occur in e.histolytica?
|
No. - only the large size causes the disease.
|
|
What is the Life cycle of E.histolytica?
|
- trophozoite >>precyst<>metacyst>>metacystic trophozoite. ( several succesive stages occur.
|
|
List some characteristics of E.histolytica
|
- blunt short psuedopodia
-filopodia
-clear cytoplasm
- granular cytoplasm
- spherical nucleus
- prominent endosome
|
|
List some additional features of E.histolytica
|
- nucleus easier seen after staining
- achromatic microfibrils
- chromatin found only in concentrated granules.
-gives appearance of dark circle and bulls eye in center
-
|
|
Does E.histolytica have a thin or thick nuclear membrane?
|
Thin nuclear membrane.
|
|
How does precyst form cyst?
|
By cecreting a thin tough hyaline cyst wall.
|
|
What do young cyst divide to form?
|
2-4 nuclei
|
|
What disappears when cyst form?
|
Glycogen and chromatid bodies disappear.
|
