[Fistulous pyoderma caused by Serratia liquefaciens]

Area of Science:

• Medical Microbiology
• Dermatology

Background:

• Human infections caused by Serratia liquefaciens are infrequently reported.
• Fistulous pyoderma is a chronic bacterial skin infection characterized by pus-discharging tracts.

Observation:

• A patient presented with skin lesions initially suspected to be dermal tuberculosis.
• Histological, microbiological, and X-ray examinations were conducted for diagnosis.
• Serratia liquefaciens was identified as the sole causative agent of the skin lesions through microbial culture.

Findings:

• The patient's skin lesions resolved completely following treatment.
• Sulfamethoxazole trimethoprim was the chosen antibiotic regimen for therapy.
• Antibiotic resistance and sensitivity testing are crucial for effective Serratia infection management.

Implications:

• This case highlights Serratia liquefaciens as a potential pathogen in complex skin infections.
• Effective treatment relies on accurate microbiological diagnosis and targeted antibiotic therapy.
• Further research may elucidate the prevalence and clinical spectrum of Serratia liquefaciens human infections.