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