GI Infections Flashcards Preview

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Flashcards in GI Infections Deck (42):
1

Suprantigen in GI tract
Vomiting, watery non-bloody diarrhoea
B haemolytic colonies on blood agar
From poor food handling
Appears in tetrad clusters G stain

Staph Aureus

2

Reheated fried rice

Bacillus Cereus

3

Bacillus Cereus toxins (x2)

Heat stabile (emetic) and Heat labile (diarrhoeal)

4

Treatment Bacillus Cereus?

None, self limiting

5

Treatment S Aureus?

None, self limiting

6

Canned foods, bacteria in honey (infants)
Preformed toxin

Clostridium Botulinum

7

Preformed toxin, block of ACh release
Descending paralysis

Clostridium Botulinum

8

Treatment of Clostridium Botulinum

Antitoxin

9

Reheated meat, superantigen causes systemic toxicity
Vomiting, watery diarrhoea, lasts 24 hours
rapid onset

Clostridium Difficile

10

Aesculin positive with tumbling motility

Listeria Monocytogenes

11

Unpasteurized dairy, 'cold enhancement'

Listeria Monocytogenes

12

Treatment of Listeria Monocytogenes

Ampicillin (+ ceftriaxone, cotrimoxazole)

13

E. Coli - ETEC

Enterotoxigenic E. coli
Traveller's diarrhoea

14

E. Coli - EPEC

Enteropathogenic E. coli
Infantile diarhoea (Paeds)

15

E. Coli - HUS (3 features)

Anaemia, thrombocytopaenia, renal failure

16

E. Coli - EIEC

Invasive dystentry
Enteroinvasive E. Coli

17

E. Coli - EHEC

Haemorrhagic (verotoxin)
Enterohemorrhagic E Coli

18

Multiplies in Peyer's patches

Salmonella typhi

19

Rose spots, slow onset fever, bradycardia
CONSTIPATION

Salmonella typhi

20

Treatment of E. Coli

Self limiting but can treat with Ciprofloxaxin

21

Treatment of Salmonella

Ceftrioxone, or ciprofloxacin

22

Poultry, meat, eggs
non-lactose fermenting

Salmonella enteritidis

23

Handling reptiles

Salmonella

24

Fever, pain, bloody diarrhoea
Very low effective dose
Production of enterotoxin

Shigellae

25

Rice water stool

Vibrio Cholerae

26

Increased CAMP, efflux of Cl- into lumen
Massive diarrhoea without inflammatory cells

Vibrio Cholerae

27

Raw seafood, common in Japan
Diarrhoea x3 days

Vibrio Parahaemolyticus

28

Shellfish handler/diver

Vibrio Vulnifcus

29

Treatment of Vibrio Parahaemolyticus/Vulnifcus

Doxycycline

30

Bloody foul smelling stool
Prodrome - fever, abdo pain
Oxidase +ve
Poutry, meat, unpasteruised milk

Campylobacter Jejuni

31

Treatment of Campylobacter Jejuni

Erythromycin or ciprofloxacin

32

Mesenteric adenitis with necrotising granulomas
Farm animals
Extra GI symptoms - arthritis, erythema nordosum

Yersinia enterocolitica

33

Flask shaped ulcer

Entamoeba Histolytica

34

Motile trophozoite/non motile cyst
4 nuclei

Entamoeba Histolytica

35

Treatment Entamoeba Histolytica (x2)

Metronidazole + Paramomycin

36

Pear shaped trophozoite

Giardia lamblia

37

Travelers, hikers, cruise ships, MSM
Malabsorption of protein and fat - foul smelling non-bloody diarrhoea

Giardia lamblia

38

String test
2 nuclei

Giardia lamblia

39

Treatment of Giardia lamblia

Metronidazole

40

Swimming pools, particularly immunocompromised
Oocysts in stool by Kinyoun Acid Fast Stain

Cryptosporidium parvum

41

Treatment cryptosporidium parvum

Paromomycin

42

dsDNA, 'wheel like'
Watery diarrhoea

Rotavirus