Causative Organisms

Question 1

Osteomyelitis infants <1 year

Answer 1

Staph aureus, Group B streptococci, E. coli

Question 2

Osteomyelitis older children

Answer 2

Staph aureus, Strep pyogenes, Haemophilus influenzae

Question 3

Osteomyelitis adults

Answer 3

Staph aureus, Mycobacterium tuberculosis, Pseudomonas aeroginosa (esp. secondary to penetrating foot injuries, IVDAs)

Question 4

Septic Arthritis

Answer 4

Staphylococus aureus
Haemophilus influenzae
Streptococcus pyogenes
E. coli

Question 5

Bacterial meningitis in children

Answer 5

Neisseria meningitidis (meningococcus)

Question 6

Bacterial meningitis in adults

Answer 6

Streptococcus pneumoniae (pneumococcus)

Question 7

Bacterial meningitis in neonates

Answer 7

E. coli, Group B streptococci

Question 8

Viral meningitis

Answer 8

Enteroviruses - Echoviruses - Parechoviruses - Coxsackie A and B viruses - (Poliovirus - not seen in UK)

Mumps (now very rare due to MMR vaccine)

Herpes simplex virus

Question 9

None bleaching rash meningitis

Answer 9

N. Meningitidis

Question 10

Most common organism found in central line infections

Answer 10

Staphylococcus epidermidis

Question 11

type 2 necrotising fasciitis

Answer 11

Streptococcus pyogenes

Question 12

type III necrotising fasciitis.

Answer 12

Vibrio vulnificus is a gram negative rod

Question 13

type I necrotising fasciitis.

Answer 13

caused by mixed anaerobes and aerobes (often occurs post-surgery in diabetics). This is the most common type. Escherichia coli , pseudomonas aeruginosa, Clostridium Perfringens