Septic arthritis due to Kingella kingae in an adult patient

'Kingella kingae', a Gram negative bacillus normally found in the oropharynx of infants, is a well recognised cause of invasive bone and joint infections in paediatric patients. Osteoarticular infections due to K. kingae in adults are much less common. We report an interesting case of 'K. kingae' septic arthritis of the ankle in a 68 year old woman with rheumatoid arthritis, followed by a brief literature review.