Purple gram stain
Gram +
Cocci in clusters
Staphylococcus
Coagulase +
(cocci in clusters)
(Staph) Aureus
* Coagulase -
(cocci in clusters)
(Staph) Epidermis or saprophyticus
(*gram +ve cocci!)
Diplococci
Streptococcus
*Gram + diplococci
Streptococcus pneumoniae
*Gram - diplococci
Neisseria meningitidis
*Gram + bacilli in chains
Group B strep
Gram - intracellular diplococci
Neisseria gonorrhoeae
Gram - coccobacilli
Haemophilus influenzae
Gram + rod
Listeria monocytogenes
*Gram - rods
Escherichia coli, Legionella pneumophila