Mycobacterium chimaera infection following cardiac surgery in the United Kingdom: clinical features and outcome of the first 30 cases.

OBJECTIVES: Mycobacterium chimaera infection following cardiac surgery, due to contaminated cardiopulmonary bypass heater-cooler units, has been reported worldwide. However, the spectrum of clinical disease remains poorly understood. To address this, we report the clinical and laboratory features, treatment and outcome of the first 30 UK cases. METHODS: Case note review was performed for cases identified retrospectively through outbreak investigations and prospectively through ongoing surveillance. Case definition was Mycobacterium chimaera detected in any clinical specimen, history of cardiothoracic surgery with cardiopulmonary bypass, and compatible clinical presentation. RESULTS: Thirty patients were identified (28 with prosthetic material) exhibiting a spectrum of disease including prosthetic valve endocarditis (14/30), sternal wound infection (2/30), aortic graft infection (4/30) and disseminated (non-cardiac) disease (10/30). Patients presented a median of 14 months post surgery (maximum 5 years) most commonly complaining of fever and weight loss. Investigations frequently revealed lymphopenia, thrombocytopenia, liver cholestasis and non-necrotizing granulomatous inflammation. Diagnostic sensitivity for a single mycobacterial blood culture was 68% but increased if multiple samples were sent. In all, 27 patients started macrolide-based combination treatment and 14 had further surgery. To date, 18 patients have died (60%) a median of 30 months (interquartile range 20-39 months) after initial surgery. Survival analysis identified younger age, mitral valve surgery, mechanical valve replacement, higher serum sodium concentration and lower C-reactive protein as factors associated with better survival. CONCLUSIONS: Mycobacterium chimaera infection following cardiac surgery is associated with a wide spectrum of disease. The diagnosis should be considered in all patients who develop an unexplained illness following cardiac surgery.

Quality of life Evaluation in patients receiving Steroids (the QuESt tool): initial development in children and young people with acute lymphoblastic leukaemia.

BACKGROUND: The powerful cytotoxic and immunomodulatory effects of corticosteroids are an important element of the success that has been achieved in the treatment of acute lymphoblastic leukaemia (ALL). In addition to physical side effects, corticosteroids can adversely influence behaviour, cognitive function and mood leading to significantly impaired quality of life (QoL). A number of tools exist for assessing QoL, but none of these specifically examines changes attributable to steroids. METHODS: Children and young adults aged 8-24 years and parents of children receiving maintenance therapy for ALL from four UK centres were invited to participate. The study comprised three stages carried out over 2 years: (1) focus groups and interviews where participants were asked to describe their experiences of dexamethasone; (2) analysis of questionnaires sent to healthcare professionals and patients to evaluate the importance and relevance of the questions; and (3) cognitive interviewing. RESULTS: Interpretative phenomenological analysis of focus group and interview transcripts identified that dexamethasone adversely influenced behaviour, appetite, body image, mood and family relationships. 157 electronic survey responses were analysed leading to further item development. Cognitive interviewing confirmed face validity and internal consistency. QuESt comprises 28 questions within four domains and has three age-specific versions. CONCLUSIONS: QuESt is the first treatment-specific QoL measure for children and young adults receiving corticosteroids. It can be completed in 10-15 min by children aged ≥8 years. Further validity and reliability testing will be undertaken. Although the initial application is for ALL, QuESt may also be a valuable tool for understanding the impact of corticosteroids in other paediatric conditions.

Achilles tendinopathy following Kaletra (lopinavir/ritonavir) use.

A multitude of rheumatologic manifestations have been associated with HIV infection and protease inhibitors use. We describe two cases that display a temporal relationship between initiating Kaletra and developing Achilles tendinopathy. Immediate and dramatic resolution of symptoms occurred on switching from Kaletra to an alternative agent. Clinicians may want to consider a trial of an alternative agent in individuals on Kaletra who experience Achilles tendinopathy. Adverse events must be formally reported so that our understanding of antiretrovirals may continually evolve and aid decisions about antiretroviral prescribing.