A43.1

Clinical Causes: Direct skin trauma or injury, such as cuts, abrasions, or puncture wounds Exposure to soil or organic matter containing Nocardia bacteria, often during outdoor activities or farming Immunocompromised conditions, including HIV/AIDS, cancer, or use of immunosuppressive medications Pre-existing skin conditions that break the skin barrier

Key Symptoms: Persistent skin nodules or lumps that may ulcerate Pus or abscess formation under the skin Redness, swelling, and tenderness around affected areas Slowly enlarging skin lesions with a potential to spread to neighboring tissues In some cases, regional lymphadenopathy (swollen lymph nodes)

Diagnosis Path: Diagnosis of cutaneous nocardiosis involves a combination of clinical examination and laboratory tests. A healthcare provider may perform a skin biopsy or take a sample of pus for microscopic examination. Special staining methods and culture techniques are used to identify Nocardia bacteria. Imaging tests, such as ultrasound or MRI, may be necessary if deeper tissues are involved to assess the extent of infection.

Treatment Protocols: Effective management typically requires prolonged antibiotic therapy tailored to the specific Nocardia strain. Common antibiotics used include sulfonamides, such as trimethoprim-sulfamethoxazole. In some cases, surgical debridement of infected tissue may be necessary to remove abscesses or necrotic tissue. Close follow-up with a healthcare professional is essential to monitor treatment response and prevent recurrence.