Blood, ink, and flies: A case report on the house fly (Musca domestica) feeding on active tattooing wounds

Cases of adventitious feeding on humans by non-hematophagous insects hold significant medical relevance, yet their occurrence during active body art procedures remains undocumented. This case report describes a persistent instance of opportunistic exsudatophagy by the house fly, Musca domestica Linnaeus, 1758 (Diptera: Muscidae), during a tattooing session on a healthy 32-year-old male client in Germany. Over a four-hour timeframe, four adult house flies entered the ground-floor studio through doors and windows opened for summer cross-ventilation. The insects exhibited highly persistent landing and feeding attempts directly on the freshly wounded tissue of the right lower leg, actively drinking a matrix of blood, plasma, and tattoo ink. Attraction intensified significantly once large-scale shading expanded the exuding epidermal surface area. Effective mechanical repulsion was heavily restricted by the client’s enforced immobility required to ensure precise tattoo application. Following a routine aftercare protocol, the lesion healed completely without secondary bacterial infection. This report highlights a neglected hygienic hazard where the saprophagous and coprophilic ecology of synanthropic filth flies poses a mechanical vector risk for dermal pathogen inoculation, emphasizing the necessity of simple vector control strategies in tattooing facilities.