Microbiology - Identifying Your Unknown

Gram Negative Bacterial Unknowns

Aeromonas hydrophila

Alcaligenes faecalis

Chromobacterium violaceum

Enterobacter aerogenes

Escherichia coli

Hafnia alvei

Klebsiella pneumoniae

Moraxella (Branhamella) catarrhalis

Morganella morganii

Proteus mirabilis

Proteus vulgaris

Pseudomonas aeruginosa

Salmonella typhimurium

Serratia marcescens

Shigella sonnei

* Recommendation:  Using color identification for your unknown is a wise choice after you have done many biochemical tests and want to use this as a rationale for eliminating other choices. *