Neisseria meningitidis serogroup W-135 primary monarthritis of the hip in an immunocompetent child

Reported here is the first known case of primary monarthritis of the hip du e to Neisseria meningitidis W-135. The isolate was obtained from an immunoc ompetent child suffering from acute hip pain as the only symptom upon prese ntation at the hospital. Meningococcal infection must be considered in the diagnosis of any child presenting with arthritis, even if afebrile and with out rash.