Gram positive
Staph aureus
Staphylococcus - Coagulase negative (S. epidermidis)
Streptococci
Enterococcus (faecalis and faecium)
Gram negative
PEcK
H. influenza, M. catarrhalis
N. gonorrheae and meningitidis
SPACE/SPICE (Serratia, Pseudomonas, Acinetobacter/Indole Positive Proteus, Citrobacter, Enterobacter)
Atypical
Listeria
Chlamydia
Mycoplasma
Anaerobes
Oral - Peptostreptococcus, Fusobacterium
Gut - Bacteroides, Clostridium