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Microbiology of pneumonia

Jeffrey Earl Gotts, Lauren F Chun, Jason Abbott, Xiaohui Fang, Naoki Takasaki, Stephen L Nishimura, Matthew L Springer, Suzaynn F Schick, Carolyn S Calfee, Michael A Matthay
Evidence is accumulating that exposure to cigarette smoke (CS) increases the risk of developing Acute Respiratory Distress Syndrome (ARDS). S. pneumoniae is the most common cause of bacterial pneumonia, which in turn is the leading cause of ARDS. Chronic smokers have increased rates of pneumococcal colonization and develop more severe pneumococcal pneumonia than nonsmokers, yet mechanistic connections between CS exposure, bacterial pneumonia, and ARDS pathogenesis remain relatively unexplored. We exposed mice to 3 weeks of moderate whole-body CS or air, followed by intranasal inoculation with an invasive serotype of S...
March 15, 2018: American Journal of Physiology. Lung Cellular and Molecular Physiology
Nicholas Agyepong, Usha Govinden, Alex Owusu-Ofori, Sabiha Yusuf Essack
Background: Multidrug-resistant Gram-negative bacteria have emerged as major clinical and therapeutic dilemma in hospitals in Ghana.To describe the prevalence and profile of infections attributable to multidrug-resistant Gram-negative bacteria among patients at the Komfo Anokye Teaching Hospital in the Ashanti region of Ghana. Methods: Bacterial cultures were randomly selected from the microbiology laboratory from February to August, 2015. Bacterial identification and minimum inhibitory concentrations were conducted using standard microbiological techniques and the Vitek-2 automated system...
2018: Antimicrobial Resistance and Infection Control
Agnieszka Chmielarczyk, Monika Pobiega, Grzegorz Ziółkowski, Monika Pomorska-Wesołowska, Dorota Romaniszyn, Lech Krawczyk, Jadwiga Wójkowska-Mach
BACKGROUND: The impact of multidrug-resistant organisms (MDROs), including non-fermentative bacilli (NFBs), is rising and underestimated, especially in intensive care units (ICUs). The growing prevalence of multidrug resistance (MDR) and extensive drug resistance (XDR) is challenging for clinicians, as the treatment options are limited. OBJECTIVES: The purpose of this study was to analyze the extent of the epidemiological problem of multidrugresistant, extensively drug-resistant and pandrug-resistant (PDR) non-fermentative bacilli isolated from pneumonia and bloodstream infections (BSIs) in patients hospitalized in southern Poland...
March 13, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
Demosthenes Makris, Efi Petinaki, Vasssiliki Tsolaki, Efstratios Manoulakas, Konstantinos Mantzarlis, Olimpia Apostolopoulou, Dimitrios Sfyras, Epaminondas Zakynthinos
Background: Retrospective studies have reported good clinical success rates using colistin as monotherapy to treat Acinetobacter baumannii ventilator-associated pneumonia (VAP), comparable to that obtained with colistin combined with other antibiotics. However, inadequate penetration into the pulmonary parenchyma for colistin has been shown in animal models. Aim: The aim of the study was to study prospectively the outcome, measured as clinical response and survival, of intravenously administered colistin versus colistin combined with high-dose ampicillin-sulbactam in Intensive Care Unit (ICU) patients with multiresistant A...
February 2018: Indian Journal of Critical Care Medicine
Gaye Ulubay, Ebru Ayvazoglu Soy, Irem Serifoglu, Fisun Sozen, Gokhan Moray, Mehmet Haberal
OBJECTIVES: Despite improved success with solid-organ transplant procedures, recipients remain at risk for infections, including pneumonia, due to their immunosuppressive regimens. In solid-organ transplant patients, clinical findings of pneumonia can be nonspecific, and diagnosis of pneumonia may be difficult as several conditions (drug lung, hypervolemia, infections, hemorrhage) can led to pulmonary infiltrates, mimicking pneumonia in these patients. The role of mean platelet volume, a predictor of inflammatory disease, with elevated values inversely correlated with inflammatory problems, in the diagnosis of pneumonia has not yet been investigated in solid-organ transplant patients...
March 2018: Experimental and Clinical Transplantation
Sibel Kara, Nazan Sen, Ebru Kursun, Hakan Yabanoğlu, Sedat Yıldırım, Şule Akçay, Mehmet Haberal
OBJECTIVES: Pulmonary infections are a significant cause of morbidity and mortality in solid-organ transplant recipients despite enhanced facilities for perioperative care. The aim of this study was to evaluate the demographic characteristics, clinical course, and outcomes of renal transplant recipients with pneumonia. MATERIALS AND METHODS: The medical records of all renal transplant recipients from January 2010 to December 2014 were retrospectively reviewed, and patients diagnosed with pneumonia according to Centers for Disease Control and Prevention criteria were evaluated...
March 2018: Experimental and Clinical Transplantation
Irem Serifoglu, Balam Er Dedekarginoglu, Ebru Hatice Ayvazoglu Soy, Gaye Ulubay, Mehmet Haberal
OBJECTIVES: Hemoptysis is a symptom that can be caused by airway disease, pulmonary parenchymal disease, or pulmonary vascular disease, or it can be idiopathic. Infection is the most common cause of hemoptysis, accounting for 60% to 70% of cases. Hemoptysis is also an initial symptom of diffuse alveolar hemorrhage syndrome, although it may be absent at presentation in one-third of patients. Diffuse alveolar hemorrhage is characterized by disruption of the alveolar-capillary basement membranes because of either injury or inflammation of the arterioles, venules, or capillaries, resulting in bleeding in alveolar spaces...
March 2018: Experimental and Clinical Transplantation
Ioannis Psallidas, Nikolaos I Kanellakis, Rahul Bhatnagar, Rahul Ravindran, Ahmed Yousuf, Anthony J Edey, Rachel M Mercer, John P Corcoran, Robert J Hallifax, Rachelle Asciak, Prashanth Shetty, Tao Dong, Hania E G Piotrowska, Colin Clelland, Nick A Maskell, Najib M Rahman
BACKGROUND: Pleural infection is a common complication of pneumonia associated with high mortality and poor clinical outcome. Treatment of pleural infection relies on the use of broad-spectrum antibiotics, since reliable pathogen identification occurs infrequently. We performed a feasibility interventional clinical study assessing the safety and significance of ultrasound (US)-guided pleural biopsy culture to increase microbiological yield. In an exploratory investigation, the 16S rRNA technique was applied to assess its utility on increasing speed and accuracy versus standard microbiological diagnosis...
March 7, 2018: Chest
X Huang, L Weng, L Yi, M Li, Y Y Feng, Y Tian, J G Xia, Q Y Zhan, B Du
Objective: To investigate the clinical manifestations and prognostic factors of hospital death in connective tissue disease patients with acute respiratory failure caused by pneumocystis pneumonia (PCP) admitted to two medical intensive care units(MICU). Methods: A retrospective review was conducted for all connective tissue disease (CTD) patients with acute respiratory failure from PCP in MICU of 2 academic medical centers between 2010 and 2015. The patients were divided into survivors and non-survivors. Demographic and clinical data, including laboratory, radiological and microbiological findings, as well as therapy, clinical course, mortality and prognostic factors of hospital mortality were included in the analysis...
March 12, 2018: Chinese Journal of Tuberculosis and Respiratory Diseases
Praneeth Moka, Pooja Goswami, Arti Kapil, Immaculata Xess, Vishnubhatla Sreenivas, Anoop Saraya
OBJECTIVES: The knowledge about pathogens and their antibiotic susceptibility patterns is essential to select an appropriate antibiotic. METHODS: We investigated the microbiological profile in pancreatic and extrapancreatic infections, and antibiotic sensitivity pattern in patients with acute pancreatitis. RESULTS: Of 556 patients with acute pancreatitis, only 189 developed bacterial infection; however, bacteremia was present in 42 patients (7...
April 2018: Pancreas
Ryan K Shields, M Hong Nguyen, Liang Chen, Ellen G Press, Barry N Kreiswirth, Cornelius J Clancy
Ceftazidime-avibactam was used to treat 77 patients with carbapenem-resistant Enterobacteriaceae (CRE) infections at our center. Thirty- and 90-day survival rates were 81% and 69%, respectively; rates were higher than predicted by SAPS II and SOFA scores at the onset of infection. Clinical success was achieved in 55% of patients, but varied by site of infection. Success rates were lowest for pneumonia (36%) and higher for bacteremia (75%) and urinary tract infections (88%). By multivariate analysis, pneumonia ( P =0...
March 5, 2018: Antimicrobial Agents and Chemotherapy
Talayeh Tavakoly, Samar Jamali, Ali Mojtahedi, Mohammadali Khan Mirzaei, Mohammad Shenagari
Klebsiella pneumoniae is a Gram-negative bacterium which causes several human infections. Treatment of infections related to K. pneumoniae has become problematic, because of increasing trend of extended spectrum β-lactamases producing (ESBLs) strains. The present study was aimed to detect the prevalence of ESBL-producing Klebsiella spp. and KPC-2, CMY-2 and OXA-48 β-lactamase encoding genes in clinical isolates of Klebsiella spp. isolated from hospitalized patients. In this cross-sectional study carried out from February to August 2014, 144 isolates of Klebsiella spp...
February 28, 2018: Cellular and Molecular Biology
Ying-Qi Zhang, Shui-Lan Zou, Hua Zhao, Ming-Ming Zhang, Cai-Li Han
BACKGROUND: The goal of this study was to investigate whether ceftriaxone combination therapy is associated with better clinical outcomes than respiratory fluoroquinolone monotherapy for adults with community-acquired pneumonia (CAP). We conducted a meta-analysis of published studies. METHODS: Using the PubMed, EMBASE, and Cochrane Library databases, we performed a literature search of available randomized controlled trials (RCTs) published as original articles before September 2017...
February 27, 2018: American Journal of Emergency Medicine
Vincenzo Pota, Maria Beatrice Passavanti, Pasquale Sansone, Maria Caterina Pace, Filomena Peluso, Alfonso Fiorelli, Caterina Aurilio
BACKGROUND: Descending necrotizing mediastinitis is a common and progressive polymicrobial infection involving the neck and chest with a high death rate (10 to 40%). From a microbiological point of view, descending necrotizing mediastinitis is sustained by Gram-positive bacteria (43-62%), anaerobes (46-78%), and, rarely, Gram-negative bacteria. Data collected during the Antibiotic Resistance-Istituto Superiore di Sanità project confirmed that Italy is positioned among the countries with the highest levels of resistance in most pathogenic species under surveillance...
March 3, 2018: Journal of Medical Case Reports
Elena Véliz, Alberto Fica
BACKGROUND: Ventilator-associated pneumonia (VAP) is an adverse event that increases morbidity, mortality and costs due to a prolonged stay and requirement of microbiological studies and antimicrobial therapy. There is not recent data of VAP costs in Chile. AIM: To evaluate additional costs in adult patients with VAP compared to controls in a general hospital in the Metropolitan Area. PATIENTS AND METHODS: Use of the PAHO paired casecontrol protocol for cost evaluation associated to nosocomial infections and estimation of cost in excess per VAP event...
October 2017: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
A V Gurov, Yu V Levina, A L Guseva, Z G Elchueva, S P Efimova, M V Gordienko
The objective of the present study was to elucidate the specific features of the clinical course of acute otitis media as well as the peculiarities of the vestibular function and the microbial paysage associated with this pathological condition under the present-day conditions. The study included 135 patients presenting with acute otitis media (AOM) at different stages of the disease. The discharge obtained from the tympanic cavity of all the patients was examined with the use of polymerase chain reaction in real time, audiological and vestibulogical methods...
2018: Vestnik Otorinolaringologii
Assiya El Kettani, Fakhreddine Maaloum, Idrissa Diawara, Khalid Katfy, Nadia Harrar, Khalid Zerouali, Houria Belabbes, Naima Elmdaghri
Background and Objectives: Acinetobacter baumannii bacteremia are grave because of the multi-resistance of the organism to antibiotics. This study aimed to determine the prevalence of A. baumannii isolated from blood cultures and to describe their antibiotic resistance patterns. Materials and Methods: A retrospective longitudinal study was conducted on blood cultures between 2010 and 2014 from all Ibn Rochd University Hospital intensive care units; it was based on the exploitation of microbiology laboratory database (duplicates were excluded)...
December 2017: Iranian Journal of Microbiology
Reyaz A Para, Bashir A Fomda, Rafi A Jan, Sonaullah Shah, Parvaiz A Koul
Background: There is a paucity of literature regarding the microbial etiology of community-acquired pneumonia (CAP) in India. The current study was aimed to study the microbial etiology of hospitalized adults with CAP. Methods: The study was conducted in a 700-bedded North Indian hospital. Consecutive adults admitted with CAP over a period of 2 years from 2013 to 2015 were recruited for the study, and apart from clinical evaluation underwent various microbiological studies in the form of blood culture, sputum culture, urinary antigen for pneumococcus and Legionella, serology for Mycoplasma and Chlamydia and real-time reverse transcriptase polymerase chain reaction for influenza viruses...
March 2018: Lung India: Official Organ of Indian Chest Society
Bevin Cohen, Jianfang Liu, Adam Ross Cohen, Elaine Larson
OBJECTIVE To quantify the association between having a prior bed occupant or roommate with a positive blood, respiratory, urine, or wound culture and subsequent infection with the same organism. DESIGN Case-control study. SETTING The study included 4 hospitals within an academically affiliated network in New York City, including a community hospital (221 beds), a pediatric acute-care hospital (283 beds), an adult tertiary-/quaternary-care hospital (647 beds), and a pediatric and adult tertiary-/quaternary-care hospital (914 beds)...
February 28, 2018: Infection Control and Hospital Epidemiology
Yeter Düzenli Kar, Zeynep Canan Özdemir, Özcan Bör
Aim: Febrile neutropenia is an important cause of mortality and morbidity in hematology-oncology patients undergoing chemotherapy. The objective of this study was to evaluate febrile neutropenic episodes in children with malignancy. Material and Methods: Sixty-eight children who received chemotherapy for malignancy between 2010 and 2015 were retrospectively reviewed. The demographic characteristics, laboratory data, infection foci, and frequency of microorganisms grown in culture were examined...
December 2017: Türk Pediatri Arşivi
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