PT - JOURNAL ARTICLE AU - Irasha Hettiarachchi AU - Scott Parker AU - Sanjit Singh TI - ‘Barely a scratch’: <em>Capnocytophaga canimorsus</em> causing prosthetic hip joint infection following a dog scratch AID - 10.1136/bcr-2017-221185 DP - 2018 Feb 27 TA - BMJ Case Reports PG - bcr-2017-221185 VI - 2018 4099 - http://casereports.bmj.com/content/2018/bcr-2017-221185.short 4100 - http://casereports.bmj.com/content/2018/bcr-2017-221185.full AB - Capnocytophaga canimorsus is a commensal organism commonly found in the oral cavity of cats and dogs. Infections with this organism are rare and can affect both immunocompetent and immunocompromised individuals. The authors present a case of C. canimorsus causing indolent prosthetic hip joint infection in a healthy 66-year-old woman following a history of being scratched by her pet dog. The patient had an atypical history of chronic, low-grade infection which is unusual, as this organism is more frequently associated with acute presentations and fulminant sepsis. This patient was treated successfully with a two-stage exchange of her hip prosthesis and broad-spectrum antibiotics.C. canimorsus is a very rare cause of prosthetic joint infection but an important pathogen to consider, particularly in culture-negative joint infections and a history of animal exposure.