Rice body formation in a joint or bursa is a rare condition, and is usually associated with rheumatoid arthritis or tuberculous arthritis. Here we describe a case of multiple rice body formation in a shoulder joint and in adjacent bursae, which was confirmed to be due to septic arthritis by Candida species. To the best of our knowledge, rice body formation in Candida septic arthritis in an immune-competent patient has not been previously reported.
Aged ; Arthritis, Infectious/*microbiology/radiography ; Bursa, Synovial/*microbiology/radiography ; Candida/isolation & purification ; Candidiasis/*microbiology/radiography ; Foreign Bodies/*etiology ; Humans ; Male ; Shoulder Joint/*microbiology/radiography

Mycoplasma hominis has been related with pelvic inflammatory illnesses and postpartum and neonatal infections. Extragenital M. hominis infections are rare, but septicemia, septic arthritis, wound infection, meningitis, and other infections in Immunocompromised patients have also been described. Here we report two cases of septic arthritis caused by M. hominis in patients following total knee replacement arthroplasty. After the surgery, the patients presented with knee pain and clinical signs of infection, such as fever, erythema and swelling on the surgical site. Arthroscopic debridement operations were performed on the surgical site. M. hominis was isolated from the joint fluid and identified by the microscopic visualization of the typical "fried-egg-type" colonies on Mycoplasma specific agar (pleuropneumonia-like organism agar). It was also confirmed by 16S rRNA sequencing. To the best of our knowledge, this is the first report of prosthetic joint infections with M. hominis in Korea.
Aged ; Arthritis, Infectious/*diagnosis/etiology/microbiology ; *Arthroplasty, Replacement, Knee ; Humans ; *Knee Joint ; Male ; Mycoplasma Infections/*diagnosis/etiology/microbiology ; *Mycoplasma hominis ; RNA, Ribosomal, 16S/analysis/genetics ; Sequence Analysis, RNA

Septic arthritis of the hip caused by Campylobacter fetus subsp. fetusis very rare. The authoris isolated C. fetus subsp. fetus from a specimen of the left hip. The patient was a 53-year old man with a history of heavy drinking, diabetes, and chronic hepatitis, and had been suffering from avascular necrosis of both femoral heads. It was considered that the organism invaded already damaged tissue of the joint. The patient was treated with intravenous antibiotics and later received successful total hip replacement.
Arthritis, Infectious/*etiology ; *Campylobacter Infections ; Campylobacter fetus/*isolation & purification ; Case Report ; Femur Head Necrosis/etiology ; Hip/*microbiology ; Human ; Male ; Middle Age

Infections following anterior cruciate ligament reconstruction are rare, with no previous reports citing Mycobacterium abscessus as the culprit pathogen. A 22-year-old man presented twice over three years with a painful discharging sinus over his right tibia tunnel site necessitating repeated arthroscopy and washout, months of antibiotic therapy, and ultimately culminating in the removal of the implants. In both instances, M. abscessus was present in the wound cultures, along with a coinfection of Staphyloccocus aureus during the second presentation. Though rare, M. abscessus is an important pathogen to consider in postoperative wounds presenting with chronic discharging sinuses, even in healthy non-immunocompromised patients. This case illustrates how the organism can cause an indolent infection, and how the removal of implants can be necessary to prevent the persistence of infection. Coinfection with a second organism is not uncommon and necessitates a timely change in treatment regime as well.
Anterior Cruciate Ligament/injuries/surgery ; Anterior Cruciate Ligament Reconstruction/*adverse effects ; Anti-Bacterial Agents/administration & dosage ; Arthritis, Infectious/etiology/*microbiology ; Arthroscopy ; Coinfection ; Device Removal ; Humans ; Male ; Mycobacterium Infections, Nontuberculous/*microbiology ; Recurrence ; Reoperation ; Staphylococcal Infections/*microbiology ; *Staphylococcus aureus ; Therapeutic Irrigation ; Young Adult