TERM 1
Entamoeba histolytica
DEFINITION 1
flexible plasma membrane
pseudopods for locomotion and feedin g
trophozoite (feeding stage - can inva de submucosa in
intestines)
cyst (protectove resistant stage - for ms in decreased temp or
increased dryness or change in pH)
diagnostic: Karyosome (dense mass o f chromosome around
nucleus - bulls eye shape)
fecal-oral transmission
produce amoebic abscesses in liver
TERM 2
Giardia lamblia duodenalis
DEFINITION 2
once smelled, never forgotten
Beaver Fever
trophozoite ("monkey face"- 2 nuclei) and cyst (4 nuclei)
forms
lack mitochondria
destroys microvilli of gut preventing absorption of liquid
diagnostic: stinky poop and floating stool
fecal-oral transmission
TERM 3
Trichomonas vaginalis
DEFINITION 3
sexually transmitted
leukocytes accumulate at infection site causing discharge
which is the main symptom
lacks mitochondria
trichomoniasis - vaginal infection - red , itchy, foul-smelling;
parasites found in discharge
found in semen or urine of males (ca rriers)
treatment: metronidazole
no cyst stage
TERM 4
Balantidium
coli
DEFINITION 4
only infectious ciliated protozoa
infection occurs when cysts are con sumed
fecal-oral transmission; many animal reservoirs (pigs)
conjugation may occur
mature cysts are passed with feces
ciliated trophozoite and spherical/ova l, non-ciliated cyst stages
cause ulcers in intestines
treatment: tetracycline, iodoquinol o r metronidazole
treat infected animals; no vaccine
prevention more important than tre atment
TERM 5
Isospora belli
DEFINITION 5
diagnosis by identification of oocytes in feces using
concentration techniques
eosinophilia (which is rare in protozoan infections)
severe diarrhea and malabsorption
infects both humans and animals
"football-shaped" oocysts
both asexual and sexual development in new epithelial
cells
