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.
Abscesses: incision and drainage
Antimicrobials: Clindamycin, trimethoprim-sulfamethoxazole, doxycycline, minocycline, dicloxacillin, cephalexin
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