Lactose fermenting (Lactose positive)
Enterobacter spp
Escherichia coli
Klebsiella spp
Citrobacter spp^
Serratia spp^
Non lactose-fermenting (Lactose<unk> 
Oxidase (-)
Acinetobacter spp
Burkholderia spp
E. coli
Proteus spp
Salmonella spp
Shigella spp
Serratia spp^
Stenotrophomonas maltophilia
Oxidase (+)
P. aeruginosa
Aeromonas spp.
Enterobacter spp
Escherichia coli
Klebsiella spp
Citrobacter spp^
Serratia spp^
Oxidase (-)
Acinetobacter spp
Burkholderia spp
E. coli
Proteus spp
Salmonella spp
Shigella spp
Serratia spp^
Stenotrophomonas maltophilia
Oxidase (+)
P. aeruginosa
Aeromonas spp.
Acinetobacter spp
Burkholderia spp
E. coli
Proteus spp
Salmonella spp
Shigella spp
Serratia spp^
Stenotrophomonas maltophilia
P. aeruginosa
Aeromonas spp.
Bacteroides spp,
Fusobacterium spp,
Prevotella spp.
^Serratia and Citrobacter spp can appear initially as non-lactose fermenting due to slow fermentation
Gram negative bacteria
Gram positive bacteria
Anaerobic bacteria
Viruses
Skin and soft tissue infections
Pseudoparasites
Antifungal
Ectoparasites