»	Bacterial Infections
	»	Gram-positive Infections
		»	Staphylococcal Infections
			»	Impetigo
			»	Staphylococcal Scalded Skin Syndrome (SSSS)
			»	Toxic Shock Syndrome (TSS)
			»	Bacterial Folliculitis
			»	Furuncle, Carbuncle, Abscess
		»	Streptococcal Infections
			»	Cellulitis
			»	Erysipelas (St. Anthony’s Fire)
			»	Blistering Distal Dactylitis
			»	Necrotizing Fasciitis
			»	Perianal Streptococcal Disease
			»	Ecthyma
			»	Scarlet Fever
			»	Streptococcal Toxic Shock Syndrome (STSS)
		»	Corynebacterial Infections
			»	Erythrasma
			»	Trichomycosis Axillaris
			»	Pitted Keratolysis
			»	Cutaneous Diphtheria
		»	Other gram-positive Infections
			»	Anthrax (Malignant Pustule)
			»	Erysipeloid (Fish Handler’s Disease)
			»	Actinomycosis (“Lumpy Jaw”)
			»	Actinomycetoma (Madura Foot)
	»	Gram-negative Infections
		»	Pseudomonal Infections
			»	Green Nail Syndrome
			»	Ecthyma Gangrenosum
			»	Pseudomonas Hot Foot Syndrome
			»	Pseudomonal Folliculitis (Hot Tub Folliculitis)
			»	Pseudomonal Pyoderma
		»	Other gram-negative Infections
			»	Acute Meningococcemia
			»	Bartonella Infections
			»	Rickettsiae
			»	Spirochetes
			»	Syphilis (Lues, Venereal Syphilis)
	»	Mycobacteria
		»	Tuberculosis (TB)
		»	Leprosy (Hansen’s Disease)
		»	Atypical Mycobacteria
			»	M. marinum (Fish Tank Granuloma)
			»	M. ulcerans (Buruli Ulcer)
			»	M. fortuitum Complex
			»	M. avium -Intracellulare Complex (M. avium Complex, MAI)
			»	M. kansasii

Atypical Mycobacteria

Figure 4.19
A: Erythema nodosum
leprosum, arm
(Courtesy of Dr. Paul Getz)
B: Fish tank granuloma
C: Buruli ulcer
(Courtesy of CDC)

Also known as nontuberculous mycobacteria (mycobacteria other than those causing TB and leprosy)
Found naturally in the environment (water and soil)
Transferred via dust, skin injuries, droplets, and occassionally cause opportunistic infections
Ziehl–Neelson stain; Lowenstein–Jensen culture medium