Successful use of daptomycin in Panton-Valentine leucocidin positive Staphylococcus aureus paediatric osteomyelitis

IntroductionEfficacy of daptomycin has been recorded in adult Gram-positive bone and joint infections OAI (1) and daptomycin has been used as secondary or tertiary agent when primary agents have failed (1, 2) in the treatment of osteoarticular infections caused by Staphylococcus aureus.Presentation of caseWe report a 16-year-old schoolboy with Panton-Valentine Leucocidin (PVL) positive methicillin susceptible S. aureus osteomyelitis, who was refractory to 9 days of recognised antimicrobial chemotherapy with progressive multifocal haematogenous spread. Subsequent addition of daptomycin promptly cleared the bacteraemia and arrested the disease process within 9 days.DiscussionAlthough cases have been reported of daptomycin usage in children with invasive staphylococcus bacteraemia, endocarditis and OAI (2), we believe this to be the first case report describing the use of daptomycin in paediatric osteomyelitis caused by PVL positive S. aureus.ConclusionRepercussions of osteomyelitis, in particular those caused by PVL S. aureus, and evolving resistance patterns internationally, highlight the need for further evaluation of daptomycin in the paediatric arena. The response seen with the addition of Daptomycin in this case suggests possible reduction in hospital stay and number of surgical procedures when compared to other published series using conventional antibiotic regimens.