Staphylococci are spherical gram-positive cocci arranged in irregular grapelike clusters 

-All staphylococci produce catalase, whereas no streptococci do 

-Three important species: S. aureus, S. epidermidis, and S. saprophyticus 

Staphylococcus aureus is Coagulase positive; S. epidermidis and S.saprophyticus are coagulase-negative staphylococci.

– The nose is the main site of colonization of S. aureus 

-Staphylococcus aureus causes abscesses, endocarditis, septic arthritis, and osteomyelitis, food poisoning, skin and soft-tissue infections, pneumonia, septicemia, wound infections, conjunctivitis, scalded skin syndrome, and toxic shock syndrome. 

-It is the most common cause of bacterial conjunctivitis.

Treatment: 

Abscesses: incision and drainage 

Antimicrobials: Clindamycin, trimethoprim-sulfamethoxazole, doxycycline, minocycline, dicloxacillin, cephalexin 

Folliculitis

Folliculitis is an inflammatory condition of the hair follicle characterized by groups of papules and dome-shaped pustules with central hairs 

-It can be superficial or deep 

-It can be infectious or non-infectious 

-Infections can be bacterial, viral or fungal 

-Most common bacteria causing folliculitis is Staphylococcus aureus