Disseminated septic arthritis caused by Ureaplasma urealyticum in an immunocompromised patient with hypogammaglobulinemia after rituximab therapy: Disseminated septic arthritis caused by Ureaplasma urealyticum

Purpose Ureaplasma urealyticum is a rare pathogen associated with septic arthritis that predominantly affects patients with hypogammaglobulinemia. Bacterial identification of fastidious organisms is challenging because they are undetectable by routine culture testing. To the best of our knowledge, this is the first report of septic arthritis induced by U. urealyticum infection in Japan. Case description We describe the case of a 23-year-old Japanese female with secondary hypogammaglobulinemia (serum immunoglobulin level