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;
18 Cards in this Set
- Front
- Back
|
What are common presenting symptoms?
|
1) watery diarrhea less than 2 weeks
2) low-grade fever 3) nausea 4) anorexia with weight loss |
|
|
What is seen on physical exam?
|
1) patient is cachectic
2) mild diffuse abdominal tenderness 3) slightly elevated temp |
|
|
What is the most common GI manifestation with AIDS and cryptospordosis?
|
protracted and repeated severe watery diarrhea
|
|
|
Why would you exam stool for white blood cells?
|
to determine inflammatory enteritis
|
|
|
When would you measure clostridium difficile toxin?
|
someone that was taking heavy antibiotics
|
|
|
what do the oocysts stain with?
|
modified acid fast stain
|
|
|
What are the defining characteristics of C parvum?
|
intracellular coccidian protozoa. Its oocysts are acid fast and stain red with modified carbol fuchsin
|
|
|
Each oocyst contains how many sporozoites?
|
4
|
|
|
What groups are at risk?
|
AIDS and renal or bone marrow transplant patients and gay men
|
|
|
What is a unique life cycle feature of this organism?
|
it undergoes sexual reproduction within the human host to regenerate infective oocysts
|
|
|
How is it spread?
|
fecal oral, found in water
|
|
|
What form adheres to the small intestine epithelial cells?
|
motile sporozoites
|
|
|
what is the most heavily infiltrated site?
|
jejunum
|
|
|
Where does their entire life cycle occur?
|
amongst the microvilli
|
|
|
How do they disrupt host cells?
|
by enveloping themselves in the host cell membrane "intracellular but extracytoplasmic"
|
|
|
How does diarrhea occur?
|
when intestinal absorption is disrupted
|
|
|
where does the asexual cycle occur?
|
when the parasites enter cells
|
|
|
What is it treated with?
|
no reliable therapy try with paromomycin, nitazoxanide and azithromycin. Rehydration is only necessary in non immunocompromised people
|
