Purpose Late breast implant infection is uncommon and typically caused by skin commensals. Infection with enteric organisms such as Salmonella is exceptionally rare. This case describes a delayed bilateral Salmonella breast implant infection, highlighting the diagnostic challenge posed by an atypical clinical presentation. Methodology A 35-year-old woman with cosmetic breast augmentation performed 13 years earlier presented with a two-day history of right breast pain, swelling, minimal erythema, and malaise. The contralateral breast was asymptomatic. Clinical course, investigations, management and outcomes were reviewed. Results Initial investigations demonstrated markedly elevated inflammatory markers disproportionate to subtle clinical findings and ultrasound suggestive of extracapsular implant rupture without a collection. Despite a negative septic screen and empirical antibiotics, progressive systemic and local features prompted operative intervention. Bilateral breast exploration revealed intact implants with copious purulent intracapsular fluid on the right and turbid fluid on the left. Explantation, capsulectomy, and debridement was performed. Intra-operative cultures from both breasts grew Salmonella enteritidis, sensitive to ceftriaxone and trimethoprim–sulfamethoxazole. Further history identified a recent febrile diarrhoeal illness following travel to Bali, supporting haematogenous seeding. Prolonged organism-directed antimicrobial therapy resulted in complete clinical resolution. Conclusion This case highlights Salmonella as a rare cause of delayed breast implant infection. Diagnostic challenges arose from subtle unilateral cutaneous findings, delayed symptom onset relative to gastrointestinal illness, and misleading imaging. In patients presenting with acute breast implant pathology years after implantation, atypical organisms should be considered, particularly following recent gastrointestinal illness or travel. Definitive management requires timely surgical intervention and targeted antimicrobial therapy.