Reading...
Play button
Play button
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;
15 Cards in this Set
- Front
- Back
|
Whats the most common cause of gastroenteritis?
|
Giardia
|
|
|
What are the stages of Giardia?
|
Trophozoite and cyst
|
|
|
A pt in a daycare presents with watery, fatty, foul-odor diarrhea. You do not find any Giardia antigens in stool, or cysts or trophozoites. Whats the next test to do?
|
Entero string test (ie string put into belly and left there, then examined for organisms that attach to it)
|
|
|
Besides day care centers and generally crowded places, how can Giardia be obtained?
|
Water source
|
|
|
Pt presents with history of recent camping trip and has a low CD4 count. Why is this organism a threat to our water sources?
|
We're thinking Crytosporidum hominis b/c the pt has HIV.
Its a threat to water sources because oocytes are Cl- resistant, theres large numbers of oocytes excreted, they are highly infectious immediately, and many animals excrete the oocytes |
|
|
Which parasites can be Id'ed with acid fast?
|
Cryptosporidium hominis, Clyclospora cayetanensis, Isospora belli
|
|
|
A pt ingests apples from his apple farm and gets nausea, anorexia, abd. cramps with watery diarrhea. Acid fast is positive. How do we Dx?
|
We're thinking Cyclospora cayetanensis
OOcytes NOT infective immediately like Cryptosporidium Dx = Oocytes in stool Note- Can also be obtained from water source |
|
|
Pt presents with Abd. pain, N., V, Fever, bloody diarrhea Liver abcess, and is tender hepatomegaly area. What will we see in terms of blood? Dx?
|
Ingests erythrocytes
Abs in blood AND stool Entamoeba histolytica |
|
|
Which of the parasites presented have bloody (ie inflammatory) diarrhea?
|
Entamoeba histolytica
Balantidium coli |
|
|
Which of the parasites presented have watery (ie non-inflammatory) diarrhea?
|
(Everything EXCEPT Entamoeba histolytica, Balantidium coli)
Giardia duodenalis Cyclospora cayetanensis Cryptosporidium hominis Isospora belli Microsporodium |
|
|
Which of the parasites presented can be Identified with Acid fast stain?
|
Cryptosporidium hominis
Cyclospora cayetanensis (but variably acid fast...) Isospora belli |
|
|
Which parasites can be obtained from infected water source?
|
Cyclospora cayetanensis
Cryptosporidium hominis Giardia duodenalis |
|
|
Which parasite is obtained from pigs? which worm?
|
Parasite - Balantidium coli
Worm - Taenia solium (under-cooked pork) |
|
|
Which parasites commonly infect HIV hosts?
|
Cryptosporidium hominis
Isospora belli Microsporidium species |
|
|
Where is Isospora belli found?
|
Tropics
|
