MALDI-TOF-MS Fingerprinting Provides Evidence of Urosepsis caused by Aerococcus urinae / 감염과화학요법

Urosepsis due to Aerococcus urinae is rare in clinical settings with only a few of reported cases worldwide by 16S rRNA sequencing. Here we report a case of sepsis caused by A. urinae in a 86 year-old male with complicated urinary tract infection which was confirmed through peptide mass fingerprinting of matrix-assisted laser desorption ionization time of flight mass spectrometry.

Vancomycin Resistance due to vanA Gene Expression in an Aerococcus viridans Isolate: First Case in Korea

No abstract available.

Urosepsis with Aerococcus urinae in a Patient with Complicated Urinary Tract Infection / 대한내과학회지

Aerococcus urinae is a gram-positive coccus that produces alpha-hemolysis on blood agar and is negative for catalase. A. urinae can often be misidentified as a streptococcus, staphylococcus, or enterococcus by most commercial identification systems. Although A. urinae is a rarely reported human pathogen, it can be fatal in some cases. Here we report on a case of urosepsis caused by A. urinae, identified by 16S rRNA gene sequencing in a patient with ureter stones and hydronephrosis, for the first time in Korea. It is important for physicians to consider A. urinae as a potential pathogen and to prescribe the most suitable antibiotics to ensure the best outcome.

Aerococcus viridans como agente etiológico de endocardite em valva nativa / Aerococcus viridans as etiological agent in native valve endocarditis

Aerococcus viridans é um patógeno humano incomum e endocardite por este agente na literatura é rara. Relata-se o caso de paciente feminina, 56 anos,hospitalizada devido a quadro de picos febris que, após investigação, foi diagnosticada através dos critérios clínicos de Duke, com endocardite em valva nativa. Foi evidenciado através das hemoculturas o crescimento de A. viridans, sendo o primeiro casoreportado no Brasil. Há relatos desse agente também em infecções urinárias, bacteremia, meningite e artrite séptica. No presente caso, a paciente teve melhorresposta clínica após o início da ampicilina, confirmando alguns artigos que orientam o tratamento com penicilinas.

Aerococcus viridans is an uncommon human pathogen and reports of endocarditis caused by this agent arerare in the literature. This clinical case study describes a 56 year-old female patient admitted to hospital forspiking fevers. After investigation, this was diagnosed as native valve endocarditis, based on the Duke clinicalcriteria and confirmed through the growth of A. viridans in blood cultures, making this the first reported case in Brazil. There are also reports of thisagent in urinary tract infections, bacteremia, meningitis and septic arthritis. In this case, the patient had a better clinical response after starting on ampicillin, confirmed by some articles that recommend treatment withpenicillins.

A Case of Urosepsis Caused by Aerococcus viridans / 대한내과학회지

Aerococcus viridans is a rare pathogen in humans, with only six cases of A. viridans urinary tract infections reported worldwide. Nosocomial urinary tract infections with bacteremia caused by A. viridians are even rarer, with no prior reports of urosepsis caused by A. viridans occurring in the Republic of Korea. Here we report a case of urosepsis caused by A. viridans in a 79 year-old female nursing home resident. The patient was admitted to the hospital presenting a fever of 39degrees C, chills, and oliguria for two days prior to admission. Urine culture yielded a robust growth of 105 CFU/mL of A. viridians, with blood culture positive for the same organism. Following diagnosis, the patient was treated with ciprofloxacin intravenously for 2 weeks, resulting in clearance of the infection and a full recovery from urosepsis. Although A. viridans is rarely associated with human infections, this case shows that, under the right conditions, it can be responsible for severe infections like urosepsis.

Aerococcus urinae endocarditis: A report of two cases and review of literature

BACKGROUND: Aerococcus urinae is a rare pathogen of endocarditis with high rates of embolic events, valvular damage and mortality.CASE 1:A 24 y/o male, with mitral valve prolapse, presented with recurrent fever and body malaise for four months. ?-hemolytic streptococci was isolated in his blood 3 months prior, antibiotics for 10 days temporarily relieved his symptoms. He denied illicit drug use, recent dental, genitourinary manipulations. On admission, he was febrile with a 4/6 holosystolic murmur at the apex. He had leukocytosis and elevated acute phase reactants. Blood cultures: Aerococcus urinae. A TEE revealed: ruptured chordae and vegetation at the posterior mitral valve leaflet. Gentamicin for 14 days and Ceftriaxone for 28 days was completed. Mitral valve replacement was done and LV dimension returned to normal.CASE 2:A 51 y/o male presented with 9 days of fever, chills, and malaise. He was treated with norfloxacin with no relief of symptoms. On admission, he was febrile, with a grade 2/6 holosystolic murmur at the apex and left parasternal area. He had leukocytosis and blood culture grew Aerococcus urinae. Echocardiogram showed mitral stenosis, aortic stenosis and vegetations at the mitral valve and non coronary cusp. Pen-G plus Gentamicin for 14 days and upon discharge, amoxicillin for 2 weeks was completed.DISCUSSION: Risk factors associated with A. urinae endocarditis are >65 year s of age, male, urologic abnormalities, malignancy and diabetes. Diagnosis isusually made by culture as our cases and both were found to have vegetations by echocardiography. B-lactam and amino glycoside treatment is effective and although mortality is high, both patients improved and were discharged.CONCLUSION: A. urinae endocarditis does occur in a young population and to those without urologic abnormality.

Clinical analysis on infections after cardiac transplantation

BACKGROUND: The heart transplantation is now accepted as a definite therapeutic modality in patients with terminal heart failure. With use of immunosuppressive agent, the incident of rejection deceased but risk of infection increased. Infection has been the most common cause of death in heart transplant patient, especially during the first year. The purpose of this study is to evaluate the infection of 91 patients who had heart transplantation at our hospital. METHODS: Of the total 91 patients, there were 75 males and 16 females, and the mean age was 39.8+/-14.1 years ranged from 14 to 62 years. All patients were in NYHA functional class III or IV preoperatively. The most common underlying heart diseases were dilated cardiomyopathy(72/91). The mean follow-up duration was 36.4 months (range; 0.6 ~ 103 months) and 10 patients died during this period. RESULT: There were 35 patients with infections (early infections in 4 and late infections in 32). The most common infection was skin infection of herpes virus (15 cases). Pneumonia occurred in 8 patients and responded well to antibiotics. But multiple empyema developed in one patient with bacterial pneumonia despite of antibiotics, chest tube insertion was needed. There were 4 patients with tuberculosis, 2 with tuberculous pericardial effusion, 1 with pulmonary tuberculosis and 1 with miliary tuberculosis. Sepsis was noted in 3 patients, 2 with bacterial sepsis and 1 with candidial sepsis. They all died despite of antibiotic treatment. There were 2 cases with wound infections and 1 with perianal abscess, and 1 with aortitis with paraaortic abscess due to Aerococcus viridans. Two patients with cryptococcal meningitis were successfully treated with liposomal amphotericin B and oral fluconazole, one of them also had invasive aspergillosis. There were 6 cases with cytomegalovirus (CMV) disease. Three of them had CMV viremia , 2 had CMV disease ( retinitis and colitis) and 1 had viremia and disease. CONCLUSION: There were 35 patients (38.5%) with infections and among then, 21 patients (23%) had one or more episodes of major infection. Infection was a major cause of death (30%) after heart transplantation. Careful control of infection is vital in the care of transplant recipients because infections result in increased morbidity and mortality.