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30 Cards in this Set
- Front
- Back
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what is the name for the flagellates subphylum of amoeba?
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Subphylum Mastigophora
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What are the 5 species in subphylum mastigophora?
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Dientamoeba fragilis
Giardia lamblia Chilomastix mesnili Trichomonads Enteromonas species |
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What is unique about Dientmoeba fragilis?
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It is an Amoebaflagellate - only has internal flagella none on the outside.
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What type of infection does D. fragilis cause?
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Enterocolitis when in large numbers
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What stage of D. fragilis is seen?
How big is it? |
only the troph - doesn't have a cyst.
8-12 u |
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what are the characteristics of D. fragilis?
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-Rarely ingests RBCs
-app 55% w/ 2 nuclei, most w/ 1 -has Fragmented Karyosomes |
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What is the flagellate amoeba you're most likely to see in the lab?
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Giardia lamblia
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what are the common names of giardia infections?
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Giardiasis
Backpacker's Disease - pick it up from drinking stream water |
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What are two places you might see giardia?
What are hosts? |
-Streams
-Day care centers Humans and many other animals |
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what are the characteristics of the Giardia troph?
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-10-20u
-2 Nuclei look like eyes -4 pair of flagella -axostiles down center -sucking disk -parabasal bodies |
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what are the characteristics of the giardia cyst?
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9-14 u
2-4 nuclei, congregate @ 1 end Cytoplasm shrinks from cyst wall Retains some troph structures |
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what is the life cycle of giardia?
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1 fully mature cyst will have 4 nuclei, this is infectious stage
2 trophozoites max can come from one cyst. they attach to the small intestine w/ sucking disk. |
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what are the symptoms of giardiasis?
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-diarrhea and nausea
-abdominal pain -much flatulance -weight loss -no dysentary |
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one what 3 bases is giardia diagnosed?
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1. morphological
2. enterotest 3. immunological |
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what's an enterotest?
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done when no cysts are shed in stool. Make person swallow a capsule on a string w/ 1g weight then pull back out w/ trophs attached.
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how is giardia treated and prevented?
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Treat: Metranidazole, Quinacrine
Prevent: filter water |
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What is the intestinal commensal with flagella?
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Chilomastix mesnili
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what are the characteristics of chilomastix mesnili compared to giardia?
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-Fewer flagella
-1 single nucleus (not eyes) w/ off-center karyosome -no axostiles, very vacuolated. -SPIRAL GROOVE, CAUDASTYLE |
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what are the characteristics of the Chilomastix mesnili cyst?
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-LOOKS LIKE A LEMON due to its Nipple End.
-Has a single nucleus w/ offcent karyosome and periph chromatin off to the side. |
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what are the 3 trichomonad sps?
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Trichomonas hominis
Trichomonas tenax Trichomonas vaginalis |
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how are the trichomonads speciated?
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based on where they're found because each is found in a unique body site
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what's the general morphology of all the trichomonads?
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Only trophs - no cysts
7-15 u 1 nucleus, axostyle, Post/Ant flagella, Undulating membrane |
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What is the new name for Trichomonas hominis?
Where is it found? |
Pentatrichomonas hominis
Commensal in the intestine |
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What trichomonas is a commensal in the mouth?
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Trichomonas tenax
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What trichomonas causes STDs?
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Trichomonas vaginalis - #1 STD ni the world!
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What symptoms does T. vaginalis cause in
-Females -Males |
1/7 Females: vaginitis, itching, burning, possible discharge
Males: dysuria |
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How is Trichomonas vaginalis diagnosed?
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-Symptoms seen
-Saline we mount -Diamonds medium to view motility -Microscope urinalysis |
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How is T. vaginalis treated?
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-Metranidazole
-Personal hygiene/safe sex to prevent infection |
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What 2 flagellates are commensals in the intestine (other than T. tenax)
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Enteromonas hominis
Retortamonas intestinalis |
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What does Enteromonas hominis resemble?
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Trichomonas hominis, but E. is smaller about 7 u, and has both cyst/troph stages.
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