A Case of Bilateral Knee Septic Arthritis Caused by Pneumococcal Bacteremia / 대한구급학회지

Pneumococcus can cause pneumonia, sinusitis, infective endocarditis, meningitis and primary bacteremia. However, few reports in the literature show bilateral septic arthritis with pneumococcal bacteremia. We report on a case of a 78-year old woman who presented with fever, pain and swelling in both knees. Both knee fluid aspirates were purulent with thick viscosity, and the gram stain revealed gram positive cocci in chains. The patient underwent emergent washing and arthroscopic debridement, followed with empirical antibiotics treatment. Two out of two blood cultures were positive for penicillin-susceptible Streptococcus pneumonia. Synovial fluid cultures were also positive for S. pneumoniae. The patient was treated with intravenous ceftriaxone for 4 weeks. Bilateral knee septic arthritis with pneumococcal bacteremia is rarely reported. Here we report on the case with a review of the literature.

Avascular Necrosis of Femoral Head in HIV-infected Patients: Case Reports and Review of the Literature / 감염과화학요법

After introduction of highly active antiretroviral therapy, the incidence of opportunistic infections and malignancies in HIV patients decreased. On the other hand, several osteoarticular complications are increasingly reported. Avascular necrosis of femoral head is one of such complications. HIV-infected patients have an 100-fold increased risk of avascular necrosis of femoral head compared to the general population. Many risk factors for this debilitating complication have been suggested. This paper reports five cases of avascular necrosis of femoral head in HIV-infected patients with review of literature.

Risk Factors for Febrile Neutropenia during Chemotherapy for HIV-Related Lymphoma

We evaluated risk factors for neutropenic fever and febrile prolonged neutropenia during vincristine-including chemotherapy to treat HIV-related lymphoma to investigate whether protease inhibitor (PI) treatment is associated with infectious complications due to drug interactions with chemotherapeutic agents. We included all HIV patients who received chemotherapy including vincristine for lymphoma at a single referral center in 1999-2010. Neutropenic fever was defined as absolute neutrophil count < 500 cells/microL with body temperature over 38degrees C; and prolonged neutropenia was defined if it persisted over 7 days. CODOX-M/IVAC and Stanford regimens were considered high-risk regimens for prolonged neutropenia. We analyzed 48 cycles of chemotherapy in 17 HIV patients with lymphoma. There were 22 neutropenic fever and 12 febrile prolonged neutropenia events. In multivariate analysis, neutropenic fever was associated with old age and low CD4 cell count, but not with PI use or ritonavir-boosted PI use. Low CD4 cell count and high-risk regimens were associated with febrile prolonged neutropenia. Neutropenic fever and febrile prolonged neutropenia is associated with old age, low CD4 cell count, and high-risk regimens, but not PI use, in HIV patients undergoing chemotherapy including vincristine for lymphoma.

Two Cases of Infective Endocarditis with Multiple Brain Infarcts Caused by Streptococcus agalactiae / 감염과화학요법

The higher incidence of Streptococcus agalactiae infection in the newborns and pregnant women had been well recognized. The incidence of invasive S. agalactiae infection was recently increasing in both elderly adults and those with comorbid conditions such as diabetes mellitus, liver cirrhosis, malignancy, and abnormalities in immune responses. We report our experience with two diabetic middle-aged men who suffered from S.agalactiae infective endocarditis. Case 1) A 58-year-old man with diabetes mellitus and chronic alcoholism presented with fever and both lower legs weakness. An echocardiography showed two vegetations on the mitral valve. S. agalactiae was identified from blood cultures. He was treated with penicillin G and gentamicin, and he underwent mitral valve replacement surgery because of persistent fever and newly developed brain infarcts. One month later, an amputation of the left lower leg was performed for the embolic gangrene of left lower leg. Case 2) A 57-year-old diabetic man was admitted to our hospital because of fever and left shoulder pain. He had received the incision and drainage to treat left shoulder joint septic arthritis, but he had a continuous fever. On 5th day of admission, culture of pus from the left shoulder joint revealed S. agalactiae. An echocardiography showed a vegetation on the posterior mitral leaflet. He was treated with penicillin G and gentamicin. On 18th day of admission, a mitral valve replacement surgery was performed. He was discharged without recurrence.

Two Cases of Infective Endocarditis with Multiple Brain Infarcts Caused by Streptococcus agalactiae / 감염과화학요법

The higher incidence of Streptococcus agalactiae infection in the newborns and pregnant women had been well recognized. The incidence of invasive S. agalactiae infection was recently increasing in both elderly adults and those with comorbid conditions such as diabetes mellitus, liver cirrhosis, malignancy, and abnormalities in immune responses. We report our experience with two diabetic middle-aged men who suffered from S.agalactiae infective endocarditis. Case 1) A 58-year-old man with diabetes mellitus and chronic alcoholism presented with fever and both lower legs weakness. An echocardiography showed two vegetations on the mitral valve. S. agalactiae was identified from blood cultures. He was treated with penicillin G and gentamicin, and he underwent mitral valve replacement surgery because of persistent fever and newly developed brain infarcts. One month later, an amputation of the left lower leg was performed for the embolic gangrene of left lower leg. Case 2) A 57-year-old diabetic man was admitted to our hospital because of fever and left shoulder pain. He had received the incision and drainage to treat left shoulder joint septic arthritis, but he had a continuous fever. On 5th day of admission, culture of pus from the left shoulder joint revealed S. agalactiae. An echocardiography showed a vegetation on the posterior mitral leaflet. He was treated with penicillin G and gentamicin. On 18th day of admission, a mitral valve replacement surgery was performed. He was discharged without recurrence.