Session 9 - Microbiology of the GI tract Flashcards Preview

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Flashcards in Session 9 - Microbiology of the GI tract Deck (17)
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1
Q

What are the roles that bacteria play in supporting the normal function of the GI tract?

A
  • Synthesise and excrete vitamins that are absorbed by host. Vit K, B12, thiamine and many other B vitamins.
  • Prevent colonisation by pathogens
  • Kill non-indigenous bacteria
  • Stimulate development of MALT (mucosal associated lymphoid tissue)
  • Stimulate production of natural antibodies
2
Q

What 3 gram positive aerobic cocci inhabit the GI?

A

Staphylococci

Streptococci

Enterococci

All -cocci

3
Q

What 2 gram negative aerobic cocci inhabit the GI?

A

Neisseria meningitidis

Neisseria gonorrhoeae

All neisseria

4
Q

What 2 gram positive aerobic bacilli inhabit the GI?

A

Mycobacterium TB

Lactobacillus

5
Q

What 4 gram negative aerobic enteric bacilli inhabit the GI?

A

E coli

Salmonella

H pylori

Vibrio cholera

6
Q

What 2 non enteric gram negative aerobic bacilli inhabit the GI?

A

H. influenzae

Bordetella pertussis

7
Q

What gram positive anaerobic bacilli inhabits the GI?

A

Clostridia tetani, difficile, and perfringens

8
Q

What enteric gram negative anaerobic bacilli inhabits the GI?

A

Bacteroides fragilis

9
Q

Give a common cause for oral thrush and its treatment

A

Candida albicans - amphotericin lozenges

10
Q

Give a common cause for gingivitis

A

streptococcus mutans

11
Q

Give a common cause for parotitis

A

staph aureus

12
Q

Give a common viral and bacterial cause for tonsilitis

A

Adenovirus.

Strep pyogenes

13
Q

Give a common cause for peptic ulcers

A

H pylori

14
Q

What prophylaxis would you give to reduce surgical site infections?

A

Metroniadazole kills anaerobes and a broad spectrum antibiotic such as gentamicin or cephalosporin given.

15
Q

Why is lactobacillus physiologically important in the vagina?

A
  • Produces acidic environment in vagina
  • Prevents other bacteria and candida albicans from growing
16
Q

What is the commonest cause of UTI? How would you diagnose a UTI?

A

E. coli

Diagnose with an MSU

17
Q
A