Bacterial skin infections are important to recognize because we have the means 
to eradicate almost all of them. Primary skin infections are mainly caused by 
staphylococci or streptococci. Staphylococci infections present as furuncles and 
carbuncles, superficial folliculitis, impetigo or rarely the Scalded Skin 
Syndrome. Streptococcal infections present as impetigo, ecthyma, erysipelas or 
cellulitis. Corynebacteria causes erythrasma, trichomycosis or pitted 
keratolysis. Gram-negative primary skin infections, although uncommon, may 
occur; bacterial cultures are generally necessary for diagnosis. Secondary 
bacterial infections of pre-existing wounds, burns, dermatitic skin, or 
retention cysts are common events.