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Viral pneumonia and bacterial pneumonia

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https://www.readbyqxmd.com/read/28298903/apoptosis-toll-like-rig-i-like-and-nod-like-receptors-are-pathways-jointly-induced-by-diverse-respiratory-bacterial-and-viral-pathogens
#1
Isidoro Martínez, Juan C Oliveros, Isabel Cuesta, Jorge de la Barrera, Vicente Ausina, Cristina Casals, Alba de Lorenzo, Ernesto García, Belén García-Fojeda, Junkal Garmendia, Mar González-Nicolau, Alicia Lacoma, Margarita Menéndez, David Moranta, Amelia Nieto, Juan Ortín, Alicia Pérez-González, Cristina Prat, Elisa Ramos-Sevillano, Verónica Regueiro, Ariel Rodriguez-Frandsen, Dolores Solís, José Yuste, José A Bengoechea, José A Melero
Lower respiratory tract infections are among the top five leading causes of human death. Fighting these infections is therefore a world health priority. Searching for induced alterations in host gene expression shared by several relevant respiratory pathogens represents an alternative to identify new targets for wide-range host-oriented therapeutics. With this aim, alveolar macrophages were independently infected with three unrelated bacterial (Streptococcus pneumoniae, Klebsiella pneumoniae, and Staphylococcus aureus) and two dissimilar viral (respiratory syncytial virus and influenza A virus) respiratory pathogens, all of them highly relevant for human health...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28290951/pneumonia-at-marine-corps-recruit-depots-current-trends-in-ambulatory-encounters-and-inpatient-discharges
#2
Kristen Rossi, Gosia Nowak, Asha Jindal Riegodedios
BACKGROUND: Acute respiratory infections are recognized as a significant source of morbidity for military populations, particularly for recruits. This analysis aims to describe the pneumonia burden at Marine Corps Recruit Depots (MCRD) in Parris Island and San Diego during 2007-2014, as these two depots maintain noteworthy comparisons in vaccine and prophylaxis policies. First, both depots reinstated the adenovirus vaccine in October 2011. Second, San Diego provides the pneumococcal polysaccharide vaccine to all recruits within the first 2 days of arrival, although Parris Island does not routinely vaccinate for Streptococcus pneumoniae...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28282407/potential-disease-agents-in-domestic-goats-and-relevance-to-bighorn-sheep-ovis-canadensis-management
#3
Mark L Drew, Glen C Weiser
Domestic goats are raised for meat, milk and hair production, in herds for rangeland weed control, and as pack animals. Domestic sheep, goats and wild bighorn sheep are all susceptible to a multifactorial pneumonia. We sampled 43 herd goats from 7 herds and 48 pack goats from 11 herds for viral and bacterial serology, parasitology, and Pasteurellaceae microbiology. The goats in this study were in generally good health, although most goats did harbor various pathogens and parasites including several bacteria, specifically Pasteurellaceae, which have been associated with pneumonia in free-ranging bighorn sheep...
2017: PloS One
https://www.readbyqxmd.com/read/28281094/clinical-features-and-inflammatory-markers-in-pediatric-pneumonia-a-prospective-study
#4
Are Stuwitz Berg, Christopher Stephen Inchley, Hans Olav Fjaerli, Truls Michael Leegaard, Morten Lindbaek, Britt Nakstad
In this prospective, observational study on previously healthy children <18 years, we aimed to study the diagnostic ability of clinical features and inflammatory markers to (i) predict pathologic chest radiography in suspected pneumonia and (ii) differentiate etiology in radiological proven pneumonia. In 394 cases of suspected pneumonia, 265 (67%) had radiographs consistent with pneumonia; 34/265 had proof of bacterial etiology. Of the cases, 86.5% had received pneumococcal conjugate vaccine. In suspected pneumonia, positive chest radiography was significantly associated with increasing C-reactive protein (CRP) values, higher age, and SpO2 ≤92% in multivariate logistic regression, OR 1...
March 9, 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28279802/prevention-of-influenza-virus-induced-bacterial-superinfection-by-standardized-echinacea-purpurea-via-regulation-of-surface-receptor-expression-in-human-bronchial-epithelial-cells
#5
Vimalanathan Selvarani, Schoop Roland, Suter Andy, Hudson James
Viral infections may predispose the airways to secondary bacterial infections that can lead to unfavorable progression of principally self-limiting illnesses. Such complicated respiratory infections include pneumonia, bronchitis, sinusitis, acute otitis media, and sepsis, which cause high morbidity and lethality. Some of the pathogenic consequences of viral infections, like the expression of bacterial adhesion receptors and the disturbance of physical barrier integrity due to inflammation, may create permissive conditions for co-infections...
March 6, 2017: Virus Research
https://www.readbyqxmd.com/read/28261167/discovery-and-characterization-of-diazenylaryl-sulfonic-acids-as-inhibitors-of-viral-and-bacterial-neuraminidases
#6
Anja Hoffmann, Martina Richter, Susanne von Grafenstein, Elisabeth Walther, Zhongli Xu, Lilia Schumann, Ulrike Grienke, Christina E Mair, Christian Kramer, Judith M Rollinger, Klaus R Liedl, Michaela Schmidtke, Johannes Kirchmair
Viral neuraminidases are an established drug target to combat influenza. Severe complications observed in influenza patients are primarily caused by secondary infections with e.g., Streptococcus pneumoniae. These bacteria engage in a lethal synergism with influenza A viruses (IAVs) and also express neuraminidases. Therefore, inhibitors with dual activity on viral and bacterial neuraminidases are expected to be advantageous for the treatment of influenza infections. Here we report on the discovery and characterization of diazenylaryl sulfonic acids as dual inhibitors of viral and Streptococcus pneumoniae neuraminidase...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28260460/sirolimus-induced-combined-posterior-reversible-encephalopathy-syndrome-and-lymphocytic-pneumonitis-in-a-renal-transplant-recipient-case-report-and-review-of-the-literature
#7
Osama Gheith, Magdalena Cerna, Medhat A Halim, Narayanam Nampoory, Torki Al-Otaibi, Prasad Nair, Tarek Said, Hassanein Abo Atteya, Kenneth Katchy
The mammalian target of rapamycin inhibitor sirolimus was introduced into clinical transplant practice in 1999. Dose-related myelosuppression and hyper lipidemia are the most common adverse effects. Pulmonary toxicity has been reported since 2004 and can cause interstitial pneumonitis, organizing pneumonia, and alveolar hemorrhage. Moreover, it can occasionally induce posterior reversible encephalopathy syndrome, as documented in scarce reports. To our knowledge; this is the 1st report of combined posterior reversible encephalopathy syndrome and lymphocytic pneumonitis to be induced by sirolimus...
February 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28252630/-pharmacoepidemiological-study-of-the-course-of-influenza-and-other-acute-respiratory-viral-infections-in-risk-groups
#8
V A Bulgakova, A A Poromov, A I Grekova, N Yu Pshenichnaya, E P Selkova, N I Lvov, I A Leneva, I V Shestakova, V V Maleev
AIM: To identify risk factors (RFs) for the development of bacterial complications and the prolonged course of influenza and other acute respiratory viral infections (ARVIs) among inpatients treated in Russian healthcare facilities in the post-pandemic period; to determine the clinical presentation of the disease (flu-like syndrome) in risk-group people and to evaluate the efficacy of antiviral therapy with arbidol (umifenovir). MATERIAL AND METHODS: The investigators retrospectively analyzed randomly selected medical records of inpatients with influenza and other ARVI in 88 hospitals from 50 regions of the Russian Federation: those of 3532 and 1755 patients in the 2010-2011 and 2014-2015 seasons, respectively, by applying parametric and nonparametric statistical methods...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28218726/biomarkers-in-pediatric-community-acquired-pneumonia
#9
REVIEW
Nicola Principi, Susanna Esposito
Community-acquired pneumonia (CAP) is an infectious disease caused by bacteria, viruses, or a combination of these infectious agents. The severity of the clinical manifestations of CAP varies significantly. Consequently, both the differentiation of viral from bacterial CAP cases and the accurate assessment and prediction of disease severity are critical for effectively managing individuals with CAP. To solve questionable cases, several biomarkers indicating the etiology and severity of CAP have been studied...
February 19, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28217919/serious-infection-rates-among-children-with-systemic-lupus-erythematosus-enrolled-in-medicaid
#10
Linda T Hiraki, Candace H Feldman, Francisco M Marty, Wolfgang C Winkelmayer, Hongshu Guan, Karen H Costenbader
OBJECTIVE: To investigate the nationwide prevalence and incidence of serious infections among children with systemic lupus erythematosus (SLE) enrolled in Medicaid, the U.S. health insurance program for low-income patients. METHODS: From Medicaid claims (2000-2006) we identified children 5 to <18 years old with SLE (≥3 ICD-9 codes of 710.0, each >30 days apart) and lupus nephritis (LN; ≥2 ICD-9 codes for kidney disease on/after SLE codes). From hospital discharge diagnoses, we identified infection subtypes (bacterial, fungal, viral)...
February 19, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28198193/association-between-dehydration-and-fever-during-the-first-week-of-life
#11
Ariane Boutin, Ana Carceller, Marie Pier Desjardins, Marisol Sanchez, Jocelyn Gravel
BACKGROUND: Trying to differentiate serious bacterial infection (SBI) from a self-limiting illness in febrile infants seen in the pediatric emergency department (PED) is a significant challenge. The aim of the study was to determine the prevalence of dehydration and its relationship to SBI in febrile full-term newborns under 1 week of age seen in a PED. METHODS: A retrospective observational study was carried out on all children younger than 8 days of age with fever who presented to a single, tertiary care, PED from January 2009 to April 2014...
February 1, 2017: Clinical Pediatrics
https://www.readbyqxmd.com/read/28182741/etiology-of-severe-pneumonia-in-ecuadorian-children
#12
Sivani Jonnalagadda, Oswaldo Rodríguez, Bertha Estrella, Lora L Sabin, Fernando Sempértegui, Davidson H Hamer
BACKGROUND: In Latin America, community-acquired pneumonia remains a major cause of morbidity and mortality among children. Few studies have examined the etiology of pneumonia in Ecuador. METHODS: This observational study was part of a randomized, double blind, placebo-controlled clinical trial conducted among children aged 2-59 months with severe pneumonia in Quito, Ecuador. Nasopharyngeal and blood samples were tested for bacterial and viral etiology by polymerase chain reaction...
2017: PloS One
https://www.readbyqxmd.com/read/28182108/assessment-of-the-usefulness-of-multiplex-real-time-pcr-tests-in-the-diagnostic-and-therapeutic-process-of-pneumonia-in-hospitalized-children-a-single-center-experience
#13
Ewelina Gowin, Alicja Bartkowska-Śniatkowska, Katarzyna Jończyk-Potoczna, Joanna Wysocka-Leszczyńska, Waldemar Bobkowski, Piotr Fichna, Paulina Sobkowiak, Katarzyna Mazur-Melewska, Anna Bręborowicz, Jacek Wysocki, Danuta Januszkiewicz-Lewandowska
The aim of the study was assessment of the usefulness of multiplex real-time PCR tests in the diagnostic and therapeutic process in children hospitalized due to pneumonia and burdened with comorbidities. Methods. The study group included 97 children hospitalized due to pneumonia at the Karol Jonscher Teaching Hospital in Poznań, in whom multiplex real-time PCR tests (FTD respiratory pathogens 33; fast-track diagnostics) were used. Results. Positive test results of the test were achieved in 74 patients (76...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28181039/irf3-inhibits-neutrophil-recruitment-in-mice-infected-with-pseudomonas-aeruginosa
#14
Zhenghao Piao, Haiying Yuan, Cuili Wang, Liyun Shi
Pseudomonas aeruginosa is the major cause of morbidity and mortality in patients with ventilator-associated pneumonia. Interferon regulatory factor 3 (IRF3) is a transcription factor that plays an important role in the immune response to viral infection via the IRF3/IFN-β signaling pathway. Controversial data exist regarding the role of IRF3 in immune cell recruitment during bacterial infections. IRF3 has been shown to promote neutrophil recruitment and bacterial clearance in mice infected with P. aeruginosa by inducing the production of specific chemokines and cytokines...
February 8, 2017: Inflammation
https://www.readbyqxmd.com/read/28168862/increased-systemic-cytokine-chemokine-expression-in-asthmatic-and-non-asthmatic-patients-with-bacterial-viral-or-mixed-lung-infection
#15
Maria J Giuffrida, Nereida Valero, Jesus Mosquera, Anyelo Duran, Francisco Arocha, Betulio Chacín, Luz Marina Espina, Jenifer Gotera, John Bermudez, Alibeth Mavarez, Melchor Alvarez-Mon
This study was aimed to determine the profiles of serum cytokines (IL-1β, TNF-α, IL-4, IL-5) and chemokines (MCP-1: monocyte chemoattract protein-1 and RANTES: regulated on activation normal T cell expressed and secreted) in individuals with an asthmatic versus a non-asthmatic background with bacterial, viral or mixed acute respiratory infection. Asthmatic (n=14) and non- asthmatic (n=29) patients with acute viral, bacterial or mixed (bacterial and viruses) respiratory infection were studied. Patients were also analyzed as individuals with pneumonia or bronchitis...
February 7, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28160239/impact-of-site-of-care-on-infection-rates-among-patients-with-primary-immunodeficiency-diseases-receiving-intravenous-immunoglobulin-therapy
#16
Richard L Wasserman, Diane Ito, Yan Xiong, Xiaolan Ye, Patrick Bonnet, Josephine Li-McLeod
PURPOSE: Patients with primary immunodeficiency diseases (PIDD) are at increased risk of infection and may require lifelong immunoglobulin G (IgG) replacement. Infection incidence rates were determined for patients with PIDD receiving intravenously administered IgG (IGIV) in a home or hospital outpatient infusion center (HOIC). METHODS: Data were extracted from a large, US-based, employer-sponsored administrative database. Patients were eligible for analysis if they had ≥1 inpatient or emergency room claim or ≥2 outpatient claims with a PIDD diagnosis between January 2002 and March 2013, 12 months of continuous health plan enrollment prior to index date (i...
February 2017: Journal of Clinical Immunology
https://www.readbyqxmd.com/read/28159179/legionnaire-s-disease-and-its-mimics-a-clinical-perspective
#17
REVIEW
Burke A Cunha, Cheston B Cunha
Whenever the cardinal manifestations of a disorder occur in similar disorders, there is potential for a disease mimic. Legionnaire's disease has protean manifestations and has the potential to mimic or be mimicked by other community acquired pneumonias (CAPs). In CAPs caused by other than Legionella species, the more characteristic features in common with legionnaire's disease the more difficult the diagnostic conundrum. In hospitalized adults with CAP, legionnaire's disease may mimic influenza or other viral pneumonias...
March 2017: Infectious Disease Clinics of North America
https://www.readbyqxmd.com/read/28159173/legionnaire-s-disease-and-influenza
#18
REVIEW
Eleni E Magira, Sryros Zakynthinos
Legionella pneumophila and influenza types A and B viruses can cause either community-acquired pneumonia with respiratory failure, or Legionella infection could attribute to influenza infection with potentially fatal prognosis. Copathogenesis between pandemic influenza and bacteria is characterized by complex interactions between coinfecting pathogens and the host. Understanding the underlying reason of the emersion of the secondary bacterial infection during an influenza infection is challenging. The dual infection has an impact on viral control and may delay viral clearance...
March 2017: Infectious Disease Clinics of North America
https://www.readbyqxmd.com/read/28159155/postviral-complications-bacterial-pneumonia
#19
REVIEW
Jason E Prasso, Jane C Deng
Secondary bacterial pneumonia after viral respiratory infection remains a significant source of morbidity and mortality. Susceptibility is mediated by a variety of viral and bacterial factors, and complex interactions with the host immune system. Prevention and treatment strategies are limited to influenza vaccination and antibiotics/antivirals respectively. Novel approaches to identifying the individuals with influenza who are at increased risk for secondary bacterial pneumonias are urgently needed. Given the threat of further pandemics and the heightened prevalence of these viruses, more research into the immunologic mechanisms of this disease is warranted with the hope of discovering new potential therapies...
March 2017: Clinics in Chest Medicine
https://www.readbyqxmd.com/read/28157451/the-role-of-nod-like-receptors-in-pulmonary-infection
#20
Kristin M Wiese, Bria M Coates, Karen M Ridge
Pneumonia is caused by both viral and bacterial pathogens and is responsible for a significant health burden in the Unites States. The innate immune system is the human body's first line of defense against these pathogens. The recognition of invading pathogens via pattern recognition receptors (PRRs) leads to proinflammatory cytokine and chemokine production followed by recruitment and activation of effector immune cells. The nonspecific inflammatory nature of the innate immune response can result in immunopathology that is detrimental to the host...
February 3, 2017: American Journal of Respiratory Cell and Molecular Biology
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