Bugs Causing Diarrhea Flashcards
1
Q
which bugs cause bloody diarrhea?
A
- Campylobacter
- E. histolytica
- Enterohemorrhagic E. coli
- Enteroinvasive E. coli
- Salmonella
- Shigella
- Y. enterocolitica
2
Q
which bugs cause watery diarrhea?
A
- C. difficile
- C. perfringens
- Enterotoxigenic E. coli
- Protozoa
- V. cholerae
- Viruses
3
Q
Campylobacter
A
- comma or S shaped organisms
- growth at 42 deg C
4
Q
E. histolytica
A
- protozoan
- amebic dysentery
- liver abscess
5
Q
Enterohemorrhagic E. coli
A
- O157:H7
- can cause HUS
- makes Shiga-like toxin
6
Q
Enteroinvasive E. coli
A
- invades colonic mucosa
7
Q
Salmonella
A
- lactose -
- flagellar motility
- has animal reservoir, especially poultry and eggs
8
Q
Shigella
A
- lactose
- very low ID50
- produces shiga toxin (human reservoir only)
- bacillary dysentery
9
Q
Y. enterocolitica
A
- day care outbreaks
- pseudoappendicitis
10
Q
C. difficile
A
- pseudomembranous colitis
- caused by antibiotics
- occasionally bloody diarrhea
11
Q
C. perfringens
A
- also cause gas gangrene
12
Q
Enterotoxigenic E. coli
A
- Travelers’ diarrhea
- produces heat labile (LT) and heat stable (ST) toxins
13
Q
name the Protozoa that cause watery diarrhea
A
- Giardia
- Cryptosporidium
14
Q
V. cholerae
A
- comma shaped organisms
- rice water diarrhea
- often from infected seafood
15
Q
name the viruses that cause watery diarrhea
A
- rotavirus
- norovirus
- adenovirus
