Streptococcal intertrigo

Streptococcal Intertrigo

Axillary intertrigo, a common site for streptococcal intertrigo.

Streptococcal intertrigo is a skin condition characterized by inflammation and infection of the skin folds, primarily caused by Streptococcus bacteria. This condition is most commonly observed in infants and young children, but it can also affect adults, particularly those with compromised immune systems or underlying skin conditions.

Pathophysiology

Streptococcal intertrigo occurs when the skin folds become moist and macerated, creating an ideal environment for bacterial growth. The Streptococcus bacteria, which are part of the normal skin flora, can overgrow in these conditions, leading to infection. The most common species involved is Streptococcus pyogenes, a Group A streptococcus.

Clinical Presentation

Patients with streptococcal intertrigo typically present with:

• Erythematous, moist patches in the skin folds
• Foul odor
• Pain and tenderness in the affected area
• Possible exudate or crusting

Common sites include the axilla, inguinal region, and neck folds. In infants, the diaper area is frequently affected.

Diagnosis

Diagnosis of streptococcal intertrigo is primarily clinical, based on the appearance of the lesions and the location. A bacterial culture can be performed to confirm the presence of Streptococcus species. Differential diagnosis includes candidal intertrigo, seborrheic dermatitis, and psoriasis.

Treatment

The mainstay of treatment for streptococcal intertrigo involves:

• Keeping the affected area clean and dry
• Topical or oral antibiotics, such as penicillin or amoxicillin, to eradicate the bacterial infection
• Use of barrier creams to protect the skin

In severe cases, systemic antibiotics may be necessary. It is also important to address any underlying conditions that may predispose the patient to intertrigo, such as obesity or diabetes mellitus.

Prevention

Preventive measures include:

• Maintaining good hygiene
• Keeping skin folds dry
• Using absorbent powders or barrier creams
• Wearing loose-fitting clothing to reduce friction

Related Pages

• Intertrigo
• Streptococcus
• Bacterial skin infections

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