Investigation of an outbreak of osteoarticular infections caused by Kingella kingae in a childcare center using molecular techniques.

We describe an outbreak of 5 osteoarticular infections among 24 daycare center attendees. Polymerase chain reaction revealed Kingella kingae in the joint fluid of 1 child and in 85% of throat samples from healthy contacts. Multilocus sequence typing performed on the joint fluid and carriage isolates identified an unique sequence type. Rifampin failed to eradicate K. kingae carriage.