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necrotizing pneumonia

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https://www.readbyqxmd.com/read/28791214/cavitary-lung-lesions-melioidosis-and-pulmonary-embolism-causing-necrotizing-pneumonia
#1
N Mohammad, W S Wan Ghazali
Cavitary lung lesions of various etiologies may be encountered in patients with respiratory symptoms associated with fever. Non-malignant cavitary lesions may mimic malignant lung lesions on most of radiographic modalities including chest radiographs or thoracic computed tomography (CT). Primary lung malignancy can be detected in as high as one-fifths of CT thorax as cavitary lesions and the remaining aetiologies may be due to bacterial, parasitic, and invasive fungal infections, as well as Granulomatosis with polyangiitis (GPA), sarcoidosis, septic thrombo-embolism, and lung metastasis from extra-pulmonary primaries...
2017: IDCases
https://www.readbyqxmd.com/read/28783418/diagnosis-and-management-of-panton-valentine-leukocidin-toxin-associated-staphylococcus-aureus-infection-an-update
#2
Yamuna Devi Bakthavatchalam, Laura E B Nabarro, Ravikar Ralph, Balaji Veeraraghavan
The incidence of invasive Staphylococcus aureus (SA) infection has increased in the past decade and is associated with poor outcomes and high mortality rates. Of all the virulence factors, Panton-Valentine Leukocidin (PVL) has received the greatest attention. PVL producing SA strains are more likely to produce severe skin and soft tissue infections (SSTIs) and necrotizing pneumonia. This review focuses on the current evidence on PVL-SA virulence, epidemiology, clinical disease and treatment with relevance to healthcare in India...
August 7, 2017: Virulence
https://www.readbyqxmd.com/read/28776532/etiology-and-outcome-of-moderate-to-massive-hemoptysis-experience-from-a-tertiary-care-center-of-north-india
#3
Ashish Bhalla, Ashok Kumar Pannu, Vikas Suri
BACKGROUND: The aim of this study was to evaluate the etiology of hemoptysis in patients presenting to emergency department of Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India. METHOD: Prospectively 110 patients presenting to the emergency department with history of hemoptysis were screened for a period of one and half years. Out of these, 64 patients having true hemoptysis were enrolled in the study. The patients were clinically evaluated with detailed history...
July 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28770121/necrotizing-pneumonia-an-emerging-problem-in-children
#4
REVIEW
I Brent Masters, Alan F Isles, Keith Grimwood
BACKGROUND: In children, necrotizing pneumonia (NP) is an uncommon, severe complication of pneumonia. It is characterized by destruction of the underlying lung parenchyma resulting in multiple small, thin-walled cavities and is often accompanied by empyema and bronchopleural fistulae. REVIEW: NP in children was first reported in children in 1994, and since then there has been a gradual increase in cases, which is partially explained by greater physician awareness and use of contrast computed tomography (CT) scans, and by temporal changes in circulating respiratory pathogens and antibiotic prescribing...
2017: Pneumonia
https://www.readbyqxmd.com/read/28768088/non-dysbaric-arterial-gas-embolism-associated-with-chronic-necrotizing-pneumonia-bullae-and-coughing-a-case-report
#5
Peter J Ceponis, William Fox, Tina D Tailor, Lynne M Hurwitz, Timothy J Amrhein, Richard Je Moon
Arterial gas embolism (AGE) can be clinically devastating, and is most often associated with exposure to changes in ambient pressure, medical procedure or congenital malformation. Here we report a case of AGE in a 78-year-old male without these traditional risk factors. Rather, the patient's history included chronic obstructive pulmonary disease, necrotizing pneumonia, bullous disease and coughing. He was safely treated with hyperbaric oxygen (HBO₂) therapy for AGE, with initial clinical improvement, but ultimately died from his underlying condition...
January 2017: Undersea & Hyperbaric Medicine: Journal of the Undersea and Hyperbaric Medical Society, Inc
https://www.readbyqxmd.com/read/28733286/the-regulator-ldhr-and-the-d-lactate-dehydrogenase-ldha-of-burkholderia-multivorans-play-a-role-in-carbon-overflow-and-in-planktonic-cellular-aggregates-formation
#6
Inês N Silva, Marcelo J Ramires, Lisa A Azevedo, Ana R Guerreiro, Andreia C Tavares, Jörg D Becker, Leonilde M Moreira
LysR-type transcriptional regulators (LTTR) are the most commonly found regulators in Burkholderia cepacia complex, comprising opportunistic pathogens causing chronic respiratory infections in cystic fibrosis (CF) patients. Despite LTTRs being global regulators of pathogenicity in several bacteria, few have been characterized in Burkholderia Here, we showed that gene ldhR of B. multivorans encoding a LTTR is co-transcribed with ldhA encoding a d-lactate dehydrogenase, and evaluate their implication in virulence traits like exopolysaccharide (EPS) synthesis and biofilm formation...
July 21, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28728546/successful-rescue-combination-of-extracorporeal-membrane-oxygenation-high-frequency-oscillatory-ventilation-and-prone-positioning-for-the-management-of-severe-methicillin-resistant-staphylococcus-aureus-pneumonia-complicated-by-pneumothorax-a-case-report-and
#7
Hangyong He, Hao Wang, Xuyan Li, Xiao Tang, Rui Wang, Bing Sun, Zhaohui Tong
BACKGROUND: To describe the experience of combination therapy with extracorporeal membrane oxygenation(ECMO), high-frequency oscillatory ventilation(HFOV) and prone positioning in treating severe respiratory failure caused by community acquired methicillin resistant Staphylococcus aureus(CA-MRSA). CASE PRESENTATION: A 30-year-old female presented with fever and dyspnea for 3 days. She was diagnosed CA-MRSA pneumonia complicated by severe respiratory failure, pneumothorax and neutropenia...
July 20, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28684133/histopathology-of-fungal-diseases-of-the-lung
#8
REVIEW
Anja C Roden, Audrey N Schuetz
Fungal pneumonias can be a diagnostic problem. However, their recognition is important as they can pose a significant health risk, especially in the immunocompromised host. While many of these infections are accompanied by necrotizing or non-necrotizing granulomas, some might be characterized by cellular interstitial pneumonia, intra-alveolar frothy material or only minimal inflammatory change. Much of the tissue reaction is dependent on the immune status of the patient and the type of fungal organism. While many of the fungi can be identified in tissue, especially if using histochemical stains such as Grocott's Methenamine Silver (GMS) stain and/or Periodic Acid Schiff (PAS) stain, in some cases, these stains are negative and the organisms can only be identified in cultures or using special techniques such as PCR or fungal serology...
June 14, 2017: Seminars in Diagnostic Pathology
https://www.readbyqxmd.com/read/28673280/incidence-clinical-features-and-implications-on-outcomes-of-neonatal-late-onset-sepsis-with-concurrent-infectious-focus
#9
I-Hsyuan Wu, Ming-Horng Tsai, Mei-Yin Lai, Lee-Fen Hsu, Ming-Chou Chiang, Reyin Lien, Ren-Huei Fu, Hsuan-Rong Huang, Shih-Ming Chu, Jen-Fu Hsu
BACKGROUND: Neonatal bloodstream infection (BSI) is the most important cause of morbidity and mortality in the neonatal intensive care unit (NICU). Although most neonatal BSIs are primary bacteremia, some are associated with a focus of infection. This distinction is not well characterized. METHODS: All patients with neonatal late-onset sepsis (LOS) between January 2006 and December 2013 were enrolled. LOS was categorized as a BSI with a concurrent focus of infection if LOS occurred before or within 24 h after the diagnosis of a specific infectious entity, and as "primary bacteremia" if no concurrent focus of infection was identified...
July 3, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28642745/structure-of-o-antigen-and-hybrid-biosynthetic-locus-in-burkholderia-cenocepacia-clonal-variants-recovered-from-a-cystic-fibrosis-patient
#10
A A Hassan, Rita F Maldonado, Sandra C Dos Santos, Flaviana Di Lorenzo, Alba Silipo, Carla P Coutinho, Vaughn S Cooper, Antonio Molinaro, Miguel A Valvano, Isabel Sá-Correia
Burkholderia cenocepacia is an opportunistic pathogen associated with chronic lung infections and increased risk of death in patients with cystic fibrosis (CF). In this work, we investigated the lipopolysaccharide (LPS) of clinical variants of B. cenocepacia that were collected from a CF patient over a period of 3.5 years, from the onset of infection until death by necrotizing pneumonia (cepacia syndrome). We report the chemical structure of the LPS molecule of various sequential isolates and the identification of a novel hybrid O-antigen (OAg) biosynthetic cluster...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28632946/emerging-biomarkers-of-illness-severity-urinary-metabolites-associated-with-sepsis-and-necrotizing-methicillin-resistant-staphylococcus-aureus-pneumonia
#11
Lilliam Ambroggio, Todd A Florin, Samir S Shah, Richard Ruddy, Larisa Yeomans, Julie Trexel, Kathleen A Stringer
Our objective was to illustrate the potential of metabolomics to identify novel biomarkers of illness severity in a child with fatal necrotizing pneumonia caused by methicillin-resistant Staphylococcus aureus (MRSA). We present a case report with two control groups and a metabolomics analysis: an infant with fatal MRSA pneumonia, four children with influenza pneumonia (pneumonia control group), and seven healthy children with no known infections (healthy control group). Urine samples were collected from all children...
June 20, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28626910/intravenous-and-intracavitary-use-of-contrast-enhanced-ultrasound-in-the-evaluation-and-management-of-complicated-pediatric-pneumonia
#12
Annamaria Deganello, Vasileios Rafailidis, Maria E Sellars, Aikaterini Ntoulia, Kleanthi Kalogerakou, Gary Ruiz, David O Cosgrove, Paul S Sidhu
Pediatric pneumonia can be complicated by necrotizing pneumonia or a parapneumonic effusion either in the form of an empyema or a clear effusion. Ultrasonography (US) and computed tomography represent well-established modalities for evaluation of complicated pediatric pneumonia. Contrast-enhanced ultrasound (CEUS) was recently introduced and is gaining increasing acceptance in pediatric imaging. In this case series, we present our initial experience with both intravenous and intracavitary use of CEUS in children with complicated pneumonia...
June 19, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28601872/il-37-causes-excessive-inflammation-and-tissue-damage-in-murine-pneumococcal-pneumonia
#13
Anja E Schauer, Tilman E Klassert, Carolin von Lachner, Diana Riebold, Anne Schneeweiß, Magdalena Stock, Mario M Müller, Sven Hammerschmidt, Philip Bufler, Ulrike Seifert, Kristina Dietert, Charles A Dinarello, Marcel F Nold, Achim D Gruber, Claudia A Nold-Petry, Hortense Slevogt
Streptococcus pneumoniae infections can lead to severe complications with excessive immune activation and tissue damage. Interleukin-37 (IL-37) has gained importance as a suppressor of innate and acquired immunity, and its effects have been therapeutic as they prevent tissue damage in autoimmune and inflammatory diseases. By using RAW macrophages, stably transfected with human IL-37, we showed a 70% decrease in the cytokine levels of IL-6, TNF-α, and IL-1β, and a 2.2-fold reduction of the intracellular killing capacity of internalized pneumococci in response to pneumococcal infection...
2017: Journal of Innate Immunity
https://www.readbyqxmd.com/read/28596927/necrotizing-pseudomonas-aeruginosa-community-acquired-pneumonia-a-case-report-and-review-of-the-literature
#14
Satish Maharaj, Carmen Isache, Karan Seegobin, Simone Chang, Grant Nelson
Lung cavities are not typically associated with community-acquired pneumonia (CAP). CAP due to P. aeruginosa is rare and even less commonly causes necrotizing pneumonia. We report a case of P. aeruginosa CAP that progressed to necrotizing pneumonia and was eventually fatal. Procalcitonin (PCT) has been well investigated in guiding antibiotic therapy (especially CAP) in adults. In this case, PCT at presentation and sequentially was negative. We discuss this caveat and present hypotheses as to the sensitivity and specificity of PCT and C-reactive protein (CRP) in these patients...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28588618/ventilator-management-of-bronchopleural-fistula-secondary-to-methicillin-resistant-staphylococcus-aureus-necrotizing-pneumonia-in-a-pregnant-patient-with-systemic-lupus-erythematosus
#15
Ahmed F Alohali, Saleh Abu-Daff, Kamardeen Alao, Mohammed Almaani
Managing mechanical ventilation in patient with bronchopleural fistula with coexisting acute respiratory distress syndrome is a challenging situation for the intensivist. We are reporting a case of a pregnant patient with systemic lupus erythematosus on immunosuppressive medications who developed methicillin-resistant Staphylococcus aureus necrotizing pneumonia complicated by bronchopleural fistula and acute respiratory distress syndrome.
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/28584102/crystal-structures-of-the-burkholderia-multivorans-hopanoid-transporter-hpnn
#16
Nitin Kumar, Chih-Chia Su, Tsung-Han Chou, Abhijith Radhakrishnan, Jared A Delmar, Kanagalaghatta R Rajashankar, Edward W Yu
Strains of the Burkholderia cepacia complex (Bcc) are Gram-negative opportunisitic bacteria that are capable of causing serious diseases, mainly in immunocompromised individuals. Bcc pathogens are intrinsically resistant to multiple antibiotics, including β-lactams, aminoglycosides, fluoroquinolones, and polymyxins. They are major pathogens in patients with cystic fibrosis (CF) and can cause severe necrotizing pneumonia, which is often fatal. Hopanoid biosynthesis is one of the major mechanisms involved in multiple antimicrobial resistance of Bcc pathogens...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28572329/complete-genome-sequence-of-a-community-associated-methicillin-resistant-staphylococcus-aureus-hypervirulent-strain-usa300-c2406-isolated-from-a-patient-with-a-lethal-case-of-necrotizing-pneumonia
#17
Jo-Ann McClure, Kunyan Zhang
USA300 is a predominant community-associated methicillin-resistant Staphylococcus aureus strain causing significant morbidity and mortality. We present here the full annotated genome of a USA300 hypervirulent clinical strain, USA300-C2406, isolated from a patient with a lethal case of necrotizing pneumonia, to gain a better understanding of USA300 hypervirulence.
June 1, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28545570/the-feasibility-of-contrast-enhanced-ultrasonography-ceus-in-the-diagnosis-of-non-cardiac-thoracic-disorders-of-dogs-and-cats
#18
N Linta, M Baron Toaldo, G Bettini, A Cordella, M Quinci, P Pey, V Galli, M Cipone, A Diana
BACKGROUND: This study describes the feasibility of Contrast Enhanced Ultrasonography (CEUS) in the diagnostic work-up of non-cardiac thoracic disorders of small animals. The second aim is to assess the usefulness of CEUS as a direct guide for sample procedures. RESULTS: Forty animals, 28 dogs and 12 cats, were included in the study. Thoracic disorders included 23 pulmonary lesions [primary carcinoma (14), lymphoma (1), sarcoma (1), histiocytic sarcoma (1), abscess (1) and pneumonia (5)] and 17 mediastinal lesions [lymphoma (8), thymoma (3), mesothelioma (1), melanoma (1), carcinomatous lymphadenopathy (1), mixsosarcoma (1), lipoma (1), and abscess (1)]...
May 25, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28536739/histological-diagnoses-of-military-personnel-undergoing-lung-biopsy-after-deployment-to-southwest-asia
#19
Cristian S Madar, Michael R Lewin-Smith, Teri J Franks, Russell A Harley, John S Klaric, Michael J Morris
INTRODUCTION: The current understanding of associations between lung disease and military deployment to Southwest Asia, including Iraq and Afghanistan, is both controversial and limited. We sought to clarify the relation between military deployment and biopsy-proven lung disease. METHODS: Retrospective data were analyzed for military personnel with non-neoplastic lung biopsies evaluated at the Armed Forces Institute of Pathology or Joint Pathology Center (January 2005 to December 2012)...
August 2017: Lung
https://www.readbyqxmd.com/read/28503304/clinico-pathologic-presentation-of-hypersensitivity-pneumonitis-in-egyptian-patients-a-multidisciplinary-study
#20
Dalia Abd El-Kareem, Yosri M Akl, Gina A Nakhla, Ali A Elhindawi, Mahmoud A Eltorky
BACKGROUND: Hypersensitivity pneumonitis (HP) is a common diffuse parenchymal lung disease in Egypt which can be difficult to recognize due to the dynamic symptoms & associated environmental factors. METHODS: Forty-three Egyptian patients were enrolled in this study, presenting with dyspnea and cough, predominant ground-glass opacity (GGO) in high-resolution computed tomography (HRCT) where lung biopsy was needed to establish the diagnosis. RESULTS: The age range was 15 to 60 years...
2017: Multidisciplinary Respiratory Medicine
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