Flashcards in 3. Gastrointestinal Infections Deck (29):
pH indicator in TSI
2 viruses that cause diarrhea
- Norwalk virus
Humans and large primates are the only reservoir
Pathogen detected by CIN agar
Infections due to this organism are NOT treated empirically
What is Reiter's syndrome
Reactive arthritis caused by Campy as well as Chlamydia
Pathogen detected by TCBS
AKA Shiga-toxin producing E. coli
E. coli acronym that causes HUS
Characteristic that separates Plesiomonas from the rest of the Enterobacteriaceae family
If a bloody stool is received, an aliquot is always sent for investigation for other pathogenic toxin-producing E. coli where?
- On site if molecular techniques available
What is PBS broth used for
Yersinia cold enrichment
AST usually tested but not reported for this organism
If Salmonella only has agglutination with the Vi antiserum, what should be done?
Boil for 10 mins, re-test the polyvalent O antiserum
Green colony on TCBS = which organism?
Most common serotype of Shigella in North America
Sh. sonnei (Group D)
Liquid media suitable for H. pylori?
Stool transport media that can be stored/transported at RT
Cary-Blair transport medium
Campylobacter catalase result?
PVA preservative cannot be used in the investigation of this organism
Yellow colony on TCBS = which organism?
E. coli acronym that is not invasive and produces no toxin
When would a Salmonella infection require treatment?
If enteric fever or other invasive infection (NOT uncomplicated gastroenteritis; non-typhoid)
3 parasites that cause diarrhea
- Giardia lambia
- Cryptosporidium spp.
- Entamoeba histolytica
E. coli acronym that causes traveler's diarrhea
Purpose of buffered glycerol
Transport best for Shigella
Rarest and most virulent Shigella
Sh. dysenteriae (Group A)
What is SAF preservative in Ova and Parasite collection?
Sodium acetate, acetic acid, formalin