Microbiology 9: Hospital Acquired Infections

Question 1

What is the most common type of healthcare associated infection ?

Answer 1

Hospital acquired pneumonia.

Question 2

Which organism is most associated with urinary catheter associated UTIs ?

Answer 2

E.Coli

Question 3

Which organism is most associated with ventilator associated pneumonia ?

Answer 3

Pseudomonas aeruginosa

Question 4

What are HAIs?

Answer 4

Onset of infection >48hrs after hospital admission

Often difficult to treat; resistance is common

Question 5

Aetiology of HAIs?

Answer 5

Aetiology: lots of pathogens, antibiotics, devices (lines, catheters), wounds

Question 6

HAI -> pneumonia organisms?

Answer 6

S. aureus, Klebsiella, Pseudomonas, Haemophilus

Question 7

What does C. diff cause? Aetiology? + Rx?

Answer 7

Pseudomembranous colitis

Caused by Abx disturbing normal gut flora – 3Cs (clindamycin, cephalosporins, ciprofloxacin)

Rx: 1st line: metronidazole; 2nd line: vancomycin

Question 8

What are some HAIs -> UTI?

Answer 8

E. coli, Klebsiella, Proteus, Pseudomonas

Question 9

What are some HAIs -> bacteraemia?

Answer 9

MRSA, CoNS, E. coli