Lecture 21 - Mucoflagellates Flashcards
1
Q
T/F: mucoflagellates only reproduce asexually
A
TRUE
2
Q
T/F: Mucoflagellates have indirect life cycles
A
FALSE
3
Q
what is giardia duodenalis
A
species complex
4
Q
how is giardia transmitted
A
fecal-oral
ingestion of cysts from feces, contaminated water, or fomites
5
Q
what are the two stages of giardia
A
- trophozoite
- cysts
6
Q
trophozoites are _____ but _____ while cysts are _____ and _____
A
active - noninfective
dormant - ineffective
7
Q
what is the reproduction of trophozoites
A
binary fission
8
Q
what is the pathogenesis of Giardia
A
indirect destruction of GI epithelial cells and villi
9
Q
summarize the pathogenesis of giardia in
A
- trophozoites attach to small intestines
- damage to epithelial cells and enterocytes
- GI permeability and blunts intestinal villi
- reduced surface area
- maldigestion, malabsorption, hypersecretion
- D+
10
Q
what are the clinical signs
A
- persistent diarrhea
- lethargy/weight loss
11
Q
how is giardia diagnosed
A
- direct fecal
- fecal centrifuge
- antigen detection kits
- PCR
12
Q
What is the recommended routine way to screen for giardia?
A
fecal float centrifugation
13
Q
A
