Microbiology

Question 1

A 28 year old chef presents to the medical team with profuse bloody diarrhoea. On further questioning he describes tenesmus. They arrange a sigmoidoscopy which reveals necrosis and ulceration of the descending colon mucosa. What is the most likely cause?

Ischaemic colitis1
Infection with Yersinia pestis

Infection with entero invasive E Coli
Infection with campylobacter
Infection with vibrio cholera

Answer 1

NECROSIS +- ULCER IN BOWEL = E.Coli. But ENTEROINVASIVE!
Necrosis and ulcers of the large bowel are a feature of enteroinvasive E.coli. It presents with a dysentery type illness similar to shigellosis.

Question 2

Fournier’s gangrene microbiology?

Answer 2

E.COLI + BACTERIOIDES!!!

FourniEEEEEEE BBBBBBBBAAATT

Question 3

Sulfur granules?

Answer 3

Acitnomycosis!

Act in SUlFUR!

Question 3

Sulfur granules?

Answer 3

Acitnomycosis!

Act in SUlFUR!

Question 4

Colon cancer bacteria association?

Answer 4

Streptococcus bovis

bowelis

Question 5

Malignant otitis externa?

Answer 5

Pseudomonas

Especially in a patient with diabetes

Question 6

Peritonsillar abscess?

Answer 6

Strep pyogenes

It is pus, abscess, pyogenes!

Question 7

Diarrhoea after AB?

Answer 7

Clostridium difficile

Question 8

Birds soiling milk?

Answer 8

Campylobacter

CampyloBirdsacter

Question 9

Melanosis coli?

Answer 9

Laxative abuse

Question 9

Melanosis coli?

Answer 9

Laxative abuse

Question 10

Severe peritoneal infections, pus, foul smell?

Answer 10

Bacteroides fragilis!