Bone and joint infections (BJI) are most often bacterial infections that can occur after surgery or de novo. They are rarely fatal in the short term, but are associated with significant morbidity, impaired quality of life and significant costs. Treatment of BJI is based on antibiotic therapy, often combined with surgery. Antibiotic therapy, at high doses, lasts a minimum of 6 weeks. It can be responsible for severe adverse effects. These characteristics (prolonged duration, multiple daily doses, and adverse effects) are known to negatively affect treatment adherence in general.

Inclusion Criteria:

• ≥ 18 years
• Diagnosis of osteoarticular infection
• Treatment with at least one oral antibiotic for a minimum expected duration ≥ 6 weeks with an expected end of treatment date
• Patient who was informed and did not object to participate in the study

Exclusion Criteria:

• Treatment for BJI with oral antibiotic without end of treatment date
• treatment for BJI with parenteral antibiotic only
• patient who doesn't have a telephone number or who doesn't want to give it
• Adults subject to a legal protection measure
• Pregnant or breastfeeding women

patients having a BJI treated by at least one oral antibiotic after a surgery