Skin disorders

• honey crusts on erythematous base, pus-filled vesicles,
• Staphylococcus aureus (90%) catalase pos coagulase pos GPC in clusters;
• Group Astreptococcus beta hemolytic catalase neg bacitracin sensitive PYR pos Gram
• positive cocci (GPC) in chains

brawny red induration (form of cellulitis) facelower extremity caused by Group A Streptococcus

infant with fragile subcorneal bulla not containing inflammatory cells rupturing easily due to epidermolytic toxins produced by staph infection elsewhere such as otitis or pharyngitis

• erythemaof skin
• super absorbent tampons (or left in too long)
• hypotension
• TSST-1toxin producing S. aureus

• petechial purpuric skin lesions following minor trauma
• hypotension
• necrotizing fasciitis
• Group A Streptococcus

• Type I polymicrobial trauma surgery Staphylococcus aureus;
• Type II Group A Streptococcus;
• Type III Clostridium perfringens or C. septicumgas gangrene

• syphilis
• primary painless punched out chancre rolled borders penile shaft or vulva
• secondary papulosquamous rash on trunk palms, soles lymphadenopathy;
• diagnosis serologic RPR confirmation FTA; plasma cells endoarteritis obliterans; Warthin Starry

• chancroid, multiple painful ragged ulcers irregular borders on penile shaft,
• Gram stain school of fish GNB,
• painful inguinal lymphadenopathy