RESUMEN
INTRODUCTION: There is little knowledge within the medical community of the existence of veterinary antibiotics in oil-based suspensions and the adverse effects that may occur with accidental human injection. CASE REPORT: A farmer injected an unknown quantity of Excenel RTU into her right thigh. Despite early debridement she developed a deep infection and recurrent chronic inflammation in the subcutaneous tissues and muscle secondary to the cottonseed oil suspension. Radical debridement and extensive split skin grafting was required but she still has had recurrences 12 months after injury. DISCUSSION: Prompt surgical debridement should be performed as in cases of oil based veterinary vaccines. Despite being an antibiotic there is a significant risk of infection from a dirty needle following inoculation and multiple cultures should be taken and appropriate broad spectrum antibiotics used. Radical debridement and skin grafting necessitating specialist plastic surgical attention may be required.