Resident Flora
Regularly found on skin
Streptococcus viridans, Streptococcus faecalis, Enterococc(Gram Positive)
Staphylococcus
(S. epidermidis, S. aureus)
Diphtheroid bacilli
Corynebacterium, Propionibacterium)
Bacillus spp
Aerobic spore forming bacilli. Gram positive
Gram Negative
coliform bacilli, fungi, and yeast
Blood agar
Enriched and differential medium. Useful to observe hemolytic properties of bacteria
Transient Flora
Not usually found on skin, but are still present
Can be pathogenic or nonpathogenic
Beta Hemolytic
E. Coli, S. aureus, and Group A streptococcus
Strepto species
Catalase negative
Staphylo species
Catalase positive
RBC
Catalase positive