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Protista
Microbiology 1 - Protista
| Question | Answer |
|---|---|
| Protista | 1 celled, eukaryotic, once a phylum (protozoa) of animal kingdom |
| 3 kinds of Protista | Plant, Fungus, Animal |
| Plant | autotrophic (self-feeding) & have green pigment chlorophyll |
| Fungus | saprophytic (feed on dead/decaying organic matter) |
| Animal | heterotrophic (other feeding), parasites |
| Animal divided by | motility, nutrition, reproduction |
| 4 animal groups | sacrodines; mastigophora; ciliophora; apicomplexa/sporazoa |
| Sarcodines | amoebas |
| 2 forms of sarcodines | trophozoite & cyst |
| trophozoite | free floating |
| cyst form | dormant encysted |
| sarcodine motility | pseudopodia (foot-like projection of cytoplasm) |
| sarcodine nutrition | phagocytosis |
| sarcodine reproduction | binary fission |
| Pathogenic sarcodines | acanthamoeba, naegleria fowler, entamoeba histolytica, dientamoeba fragilis |
| acanthamoeba | opportunists |
| ananthameoba cause | eye infection |
| A. castella affects | pancreas, skin |
| A. polyphaga | hot tub associated, can be deadly |
| A. polyphaga causes | eye, liver, kidney, brain & lung infections |
| naelgeria fowler | previously known as Gruberi |
| naelgeria fowler transmitted via | swimming |
| naelgeria fowler causes | primary meningio encephalitis (PAME) - deadly, not common |
| entamoeba histolytica causes | amoebic dysentery from ingesting cysts in water/food |
| amoebic dysentery Sx: | abdominal tenderness, 30+bms/day, severe dehydration, invades liver, lung, rarely brain |
| amoebic dysentery Dx: | blood filled cysts in stool & immunodiagnosis |
| Dientamoeba Fragilis | chronic, mild diarrhea |