Oro-Intestinal Flagellates:
Parasitology Lab Study
Guide
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trophozoite stage stage where feeding, motile, and replicating stage (watery stool) occur
cystic stage stage where resting stage; highly resistant to destruction and can survive
outside the host for several days occur
giardia lamblia discovered in 1871 by anton van leeuwenhoek in his own stool
giardia lamblia most commonly diagnosed intestinal parasite in the USA
giardia lamblia causative flagellate for traveler's diarrhea
giardiasis GIARDIA LAMBLIA diseases (6)
lambliasis
traveler's diarrhea
beaver fever
backpacker's fever
gay bowel syndrome
small intestine GIARDIA LAMBLIA habitat
duodenum
jejeunum
upper ileum
mature quadrinucleated cyst GIARDIA LAMBLIA infective stage
ingestion of contaminated food/water, oro-intestinal GIARDIA LAMBLIA mode of transmission
intercourse
children and adult campers who engage in recreational GIARDIA LAMBLIA persons at risk of exposure (6)
activities
children in day care centers
gay sex!
backpackers and campers
travelers to endemic areas
persons drinking water from shallow wells
giardia lamblia; trophozoite (flagellate; stage) bilaterally symmetrical pear-shaped flagellate, pyriform
giardia lamblia; trophozoite (flagellate; stage) tennis racket shaped flagellate