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Improving outcomes in community-acquired pneumonia

imagePurpose of review: Community-acquired pneumonia (CAP) is a pervasive disease that is encountered in outpatient and inpatient settings. CAP is the leading cause of death from an infectious disease and accounts for significant worldwide morbidity and mortality. This update reviews current advances that can be used to promote improved outcomes in CAP. Recent findings: Early recognition of CAP and its severe presentations, with appropriate site of care decisions, leads to reduced patient mortality. In addition to traditional prognostic tools, certain serum biomarkers can assist in defining disease severity and guide treatment and management strategies. The use of macrolides as part of combination antibiotic therapy has shown beneficial mortality effects across the CAP disease spectrum, especially for those with severe illness. When treating community-associated, methicillin-resistant Staphylococcus aureus pneumonia, use of an antitoxin antibiotic is likely to be valuable. Adjunctive therapy with corticosteroids may prevent delayed clinical resolution in selected patients with severe CAP. Recent data expand on the interaction of CAP with comorbid disease, particularly cardiovascular disease, and its impact on mortality in CAP patients. Summary: Improved diagnostic tools, optimized treatment regimens, and enhanced understanding of CAP-induced perturbations in comorbid disease states hold promise to improve patient outcomes.

An update on bronchoscopic treatments for chronic obstructive pulmonary disease

imagePurpose of review: The last decade has seen a real drive to develop novel bronchoscopic tools for diagnosis and therapy in a number of disease areas, in particular in cancer diagnosis and the treatment of airways disease. Nowhere has this been more evident than in the field of chronic obstructive pulmonary disease/emphysema. Recent findings: The clinical trials with randomized endobronchial valves (EBVs) have demonstrated significant improvements in pulmonary function, quality of life and exercise capacity providing patients with heterogeneous disease with absence of collateral ventilation are selected. The responder rates are improved by valve adjustment or replacement where necessary. The results for endobronchial coils have been mixed with clinically meaningful results for pulmonary function and quality of life but at 1 year, the benefits in walk tests have been marginal. Vapour therapy appears promising and has the capacity for more targeted and staged therapy. Other therapies such as sealants which induce focal fibrosis, targeted vagal nerve ablation and cryoablation of bronchitis mucosa are also under development. Summary: Patients with severe heterogenous emphysema, evidence of hyperinflation and intact lobar fissures confirmed to have absent collateral ventilation may be considered for EBVs. Those with collateral ventilation or homogenous distribution of emphysema may be considered for endobronchial coils.

Airway stent: what is new and what should be discarded

imagePurpose of review: Patients with lung cancer often develop endobronchial disease, endobronchial tumor extension or airway compression. Various nonmalignant diseases can also lead to severe central airway obstruction. Since the early 1980s, technical advances of interventional bronchoscopic techniques have improved symptom-free survival and quality of life for patients with lung cancer. Apart from other techniques, various airway stents have been developed. Although interventional procedures are not definitive therapies, they often relieve the strangling sensation produced by airway occlusion. There have been various new developments and the authors review the available current literature on endobronchial stents Recent findings: For patients with respiratory symptoms because of malignant airway obstruction, stent placement provides symptom palliation and improved quality of life. Summary: Various options for central airway obstruction are in development and will change our daily work. In particular, coated stents have a large potential in minimizing stent complications.

Multidrug-resistant pathogens in patients with pneumonia coming from the community

imagePurpose of review: Identification of patients with multidrug-resistant (MDR) pathogens at initial diagnosis is essential for the appropriate selection of empiric treatment of patients with pneumonia coming from the community. The term Healthcare-Associated Pneumonia (HCAP) is controversial for this purpose. Our goal is to summarize and interpret the data addressing the association of MDR pathogens and community-onset pneumonia. Recent findings: Most recent clinical studies conclude that HCAP risk factor does not accurately identify resistant pathogens. Several risk factors related to MDR pathogens, including new ones that were not included in the original HCAP definition, have been described and different risk scores have been proposed. The present review focuses on the most recent literature assessing the importance of different risk factors for MDR pathogens in patients with pneumonia coming from the community. These included generally MDR risk factors, specific risk factors related to methicillin-resistant Staphylococcus aureus or Pseudomonas aeruginosa and clinical scoring systems develop to assess the MDR risk factors and its application in clinical practice. Summary: Different MDR risk factors and prediction scores have been recently developed. However, further research is needed in order to help clinicians in distinguishing between different MDR pathogens causing pneumonia.

Host-directed therapies for antimicrobial resistant respiratory tract infections

imagePurpose of review: Antimicrobial-resistant respiratory tract infections (AMR-RTIs) are increasing, presenting important management challenges worldwide. Current management of AMR-RTI patients focuses on pathogen-directed antimicrobial treatment. Overt lung inflammation, parenchymal damage, and ineffective immune activation perpetrate increased patient morbidity and mortality. Immunomodulatory and tissue-regenerative host-directed therapies (HDT) may improve treatment outcomes. HDTs under investigation for improving AMR-RTI treatment outcomes are reviewed. Recent findings: Various HDTs are being developed or evaluated for adjunctive AMR-RTI treatment. α-1 antitrypsin was shown to reduce Pseudomonas aeruginosa burden in the airways of cystic fibrosis patients. Cellular therapy by reinfusing autologous bone marrow-derived MSCs into MDR/XDR-TB patients shows promise, whereas adjunctive T cell-based therapies are considered. Cytotoxic therapy using etoposide, a topoisomerase II-inhibiting anticancer drug extends survival of patients with severe influenza H1N1 infection-induced hemophagocytic lymphohistiocytosis. Two other novel HDT candidates, DAS181 and resveratrol show antiinfluenza effects. Novel kinase inhibitors SB203580 (MAPK-2 antagonist) and LY294002 (phosphoinositide-3 kinases antagonist) exhibit promising anti-MERS-CoV activity. Palivizumab, an anti-RSV monoclonal antibody, effectively prevents RSV infection in high-risk paediatric populations. T-cell therapy is currently considered for adjunctive HDT of azole-resistant pulmonary aspergillosis. Summary: Novel HDTs may revolutionize future treatment regimens for AMR-RTIs. Well designed multisite clinical trials are now necessary to accelerate progress.

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