Cellulitis - Cellulitis
- Immunocompetent adults: Staphylococcus aureus and Streptococcus pyogenes. Staphylococcus aureus is the most frequent etiology in children and in purulent cellulitis.
- Immunocompromised individuals, including those with diabetes and decubitus ulcers: mixture of gram-positive cocci and gram-negative aerobes and anaerobes.
Fevers, chills, and malaise often precede the onset of cellulitis. Poorly defined borders, erythema, swelling, tenderness, and warmth characterize typical cellulitis lesions. In adults, the extremities are the most common sites affected. In more severe cases, additional clinical features may include vesicle and bulla formation, pustules, and necrosis. Complications are not common but can include glomerulonephritis, lymphadenitis, and subacute bacterial endocarditis.
A rising prevalence of MRSA has been identified as a pathogen of skin and soft tissue infections in otherwise healthy individuals lacking the aforementioned risk factors for cellulitis. MRSA should be considered for penetrating traumas, purulent infections, and in specific populations: athletes, children, prisoners, military service members, long-term care residents, and intravenous drug users. Other MRSA risk factors include recent admission to a health care facility, presence of an indwelling catheter, poor personal hygiene, and history of MRSA.
Note: Cellulitis virtually never occurs bilaterally at the same time.
Related topics: Orbital Cellulitis, Preseptal Cellulitis
L03.90 – Cellulitis, unspecified
128045006 – Cellulitis
- Contact dermatitis
- Cutaneous anthrax
- Insect bite reactions
- Cat-scratch disease
- Necrotizing fasciitis
- Mycobacterium marinum infection
- Pasteurella multocida
- Vibrio vulnificus infection
- Eosinophilic cellulitis
- Deep venous thrombosis
- Lyme disease
- Erythema nodosum
- Sweet syndrome
- Majocchi granuloma
- Cryptococcal cellulitis
- Herpes virus infections (herpes simplex virus or zoster with associated lymphangitic erythema)
Last Updated: 08/11/2017