Flagellates PETER S AZNAR M D FPSP Giardia

Flagellates PETER S. AZNAR, M. D. , FPSP

Giardia intestinalis • AKA Giardia lamblia • S/S: bloating, flatulence, foul-smelling, fatty diarrhea (often seen in campers/hikers) • cysts in water

G. lamblia • • Old man with glasses Duodenal aspiration indicated Entero String Test Associated with nursery school diarrhea outbreaks • Tx: Metronidazole

Giardia lamblia trophozoite

Giardia lamblia cyst

Entero String Test

Chilomastix mesnili • Lemon cyst • The cytosome is evident with a curved shepherd’s crook fibril

Shepherd’s crook

Shepherd’s crook

D. fragilis • • Commonly found together with gram (-) infection Tetrad karyosome in the nucleus No cyst form Means of diagnosis: – Trichome stained smear • Associated with nursery school diarrhea outbreaks

Dientamoeba fragilis

Trichomonas hominis • AKA intestinal trichomonas • organ of locomotion; undulating membrane • undulating membrane extends the whole part of the body • no cystic stage

Trichomonas hominis trophozoite

Enteromonas hominis • • nonpathogenic trophozoites have flagella has cystic stage common food contaminant

Enteromonas hominis

Enteromonas hominis

Enteromonas hominis

Retortamonas intestinalis • smallest flagellate cyst • has two flagella • cyst is similar to chilomastix mesnili

Retortamonas intestinalis

Trichomonas tenax • • AKA oral trichomonas present in periodontal disease smallest trichomonas organ of locomotion; undulating membrane (2/3 length of the body) • no cystic stage

Trichomonas vaginalis • Strawberry shaped lesion/cervix • Associated w/ Hanging Drop tech. • virulence factors; adhesins AP 65, AP 51, AP 33, and AP 23 to vaginal epithelial cells • lacks mitochondria • undulating membrane extends one half of the body

Trichomonas vaginalis

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