Miscellaneous

Question 1

Is C Diff a gram +ve or gram -ve rod?

Answer 1

Gram +ve

Question 2

effect of C diff on the colon

Answer 2

produces exotoxin –> intestinal damage –> pseudomembranous colitis

Question 3

risk factors C. Diff (3)

Answer 3

BS ABx
use of PPIs
contact w/ patient with C Diff

Question 4

Ix C Diff

Answer 4

CDT in stool

Question 5

Mx C Diff

Answer 5

Stop PPI
PO Vancomycin QDS 10 days

Question 6

what factors increase risk of surgical site infection? (4)

Answer 6

shaving wound with razor
non iodine impregnated drape
tissue hypoxia
delayed administration of prophylactic ABx in tornique surgery

Question 7

pre-op measures to decrease surgical site infection

Answer 7

dont remove body hair
and if you do = use electrical clippers
ABx if prothesis or valve, contaminated or clean contaminated surgery

Question 8

intraoperative measures to decrease surgical site infection

Answer 8

alcoholic chlorhexidene
cover surgical site w/ dressing

Question 9

what is the most common pathogen causing acute diarrhoea?

Answer 9

campylobacter jejuni

Question 10

which part of the intestines does campylobacter act on?

Answer 10

caecum
terminal ileum

Question 11

what acute abdomen condition can campylobacter mimic?

Answer 11

appendicitis

Question 12

is campylobacter gram +ve or -ve

Answer 12

-ve

Question 13

is shigella gram +ve or -ve

Answer 13

-ve

Question 14

what condition does shigella cause

Answer 14

dysentary

Question 15

is salmonella gram -ve or gram +ve anaerobe

Answer 15

-ve

Question 16

enteroinvasive e.coli –>

Answer 16

dysentary, large bowel necrosis/ulcers

Question 17

enterotoxigenic e.coli –>

Answer 17

travellers diarrhoea

Question 18

enterohaemorrhagic e.coli 0157 –>

Answer 18

haemorrhagic colitis, HUS, TTP

Question 19

what conditions may Yersinia mimic?

Answer 19

Cronhs
Acute appendicitis

Question 20

which Abx is Yersinia sensitive to?

Answer 20

quinolones
tetracyclines

Question 21

is Yersinia gram -ve or +ve

Answer 21

-ve

Question 22

is cholera gram -ve or+ve

Answer 22

-ve

Question 23

blood agar plate - S aureus

Answer 23

Haemolysis

Question 24

what condition does the exotoxin of S aureus cause?

Answer 24

toxic shock syndrome

Question 25

what condition does the enterotoxin of S aureus cause?

Answer 25

gastroenteritis

Question 26

blood agar plate - strep pyogenes

Answer 26

beta haemolysis

Question 27

what condition does the superantigen pyogenic exotoxin A from strep pyogenes lead to?

Answer 27

Scarlett fever

Question 28

structure H Pylori

Answer 28

gram -ve rod
flagellated + mobile