Microbiology 9: Hospital Acquired Infections

Question 1

What is the most common type of healthcare associated infection ?

Answer 1

Hospital acquired pneumonia.

Question 2

C.difficile is a:

A) Gram +ve anaerobe
B) Gram -ve aerobe
C) Gram variably coccobacilus
D) Gram +ve spore forming anaerobe
E) Other

Answer 2

D) Gram +ve spore forming anaerobe

Question 3

Which organism is most associated with Surgical site infections ?

Answer 3

MRSA

Question 4

Which organism is most associated with urinary catheter associated UTIs ?

Answer 4

E.Coli

Question 5

Which organism is most associated with ventilator associated pneumonia ?

Answer 5

Pseudomonas aeruginosa

Question 6

name a gram positive cocci that forms clusters

Answer 6

S. Aureus

Question 7

what are carbepenemase-producing enterobacteriacaea and why are they a problem?

Answer 7

• bacteria resistant to carbpenems
• carbapenems = last resort antibiotics
• using lots of carbapenems increases risk
• has high mortality

Question 8

Incidence of hospital acquired infections in UK

Answer 8

8%

Question 9

5 most common hospital acquired infections

Answer 9

• 1^st: HAP
• 2^nd: surgical site infection
• 3^rd: UTI
• 4^th: blood stream infection (BSI)
• 5^th: gastrointestinal infections

Question 10

-ve vs +ve airway pressure

Answer 10

• Negative pressure isolation- protect others from an infectious patient with airborne infection
• Positive pressure isolation- protection of transplant patients from organisms outside of the room