Summary of Medical Parasitology from textbooks of Paniker's and Bailey and Scott's with Pictures of Parasites from CDC website.
Formated for a quick overview and review of the parasites.
OTHER INFO Can withstand moderate heat (45˚C) ”Contact Lens Wearers” Do not grow in agar plat
Double cell walls w/o por
CYST Smooth double wall Double Cells wall w/ pores; Wrinkled fibrous outer wall
Third lay
Amoeboid: Rounded pseudopodia; Invasive form Spine-like pseudopodia “thorny feet”;
TROPHOZOITE Long pseudopod
Flagellated: Bi-flagellated, Do not divide No flagellated stage
INFECTIVE STAGE Amoeboid Trophozoite Trophozoite Tro
DIAGNOSTIC STAGE Trophozoite Trophozoite and Cyst Trophoz
Intranasal/Oral: Swimming in freshwater lakes, pools, or
MOT Eye, Skin, ulcerated or broken skin Nasal passage; u
improper use of nasal irrigation system
NAME Giardia duodenalis Chilomastix mesnili Pentatrichomonas hominis Trichomonas vaginalis
OTHER INFO Giardia lamblia Trichomonas hominis
Nipple-like cyst; Lemon-shaped
Football shaped;
CYST Shepherd's crook or Safety pin
Young - 2 nuclei; Mature - 4 nuclei
appearance;
Pear shaped; Jerky and twitching
Old man’s Face w/ eyeglasses; Pear-shaped; distinct oral groove or Single nucleus; Undulating
TROPHOZOITE motility; Undulating membrane ½ if the
Falling leaf motility: cytostome; boring jerky movement membrane as long as costa
costa
INFECTIVE STAGE Cyst Cyst Trophozoite Trophozoite
DIAGNOSTIC STAGE Trophozoite Trophozoite and Cyst Trophozoite Trophozoite
MOT Fecal-oral Fecal-oral Fecal - oral Sexual intercourse
Tinidazole, Metronidazole;
TREATMENT Tinidazole or Metronidazole
Nitazoxanide
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