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https://www.readbyqxmd.com/read/29457249/gut-bacteria-of-cockroaches-are-a-potential-source-of-antibacterial-compound-s
#1
Noor Akbar, Ruqaiyyah Siddiqui, Mazhar Iqbal, K Sagathevan, Naveed Ahmed Khan
Here, we hypothesized that the microbial gut flora of animals/pests living in polluted environments, produce substances to thwart bacterial infections. The overall aim of this study was to source microbes inhabiting unusual environmental niches for potential antimicrobial activity. Two cockroach species, Gromphadorhina portentosa (Madagascar) and Blaptica dubia (Dubia) were selected. The gut bacteria from these species were isolated and grown in RPMI 1640 and conditioned media were prepared. Conditioned media were tested against a panel of Gram-positive (Methicillin resistant Staphylococcus aureus, Streptococcus pyogenes, Bacillus cereus) and Gram-negative (Escherichia coli K1, Salmonella enterica, Serratia marcescens, Pseudomonas aeruginosa, Klebsiella pneumoniae) bacteria, as well as the protist pathogen, Acanthamoeba castellanii...
February 19, 2018: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/29456942/bacterial-biofilms-in-chronic-rhinosinusitis-and-their-implications-for-clinical-management
#2
Abhilasha Karunasagar, Santosh S Garag, Suma B Appannavar, Raghavendra D Kulkarni, Ashok S Naik
To study the microbiological profile in patients with chronic rhino-sinusitis. To correlate disease severity with the presence of biofilms and host risk factors. To assess outcome of Sinus Surgery 2 weeks post operatively in terms of presence of bacteria and their ability to form biofilm. Prospective study. 50 cases of chronic rhino-sinusitis requiring Functional Endoscopic Sinus Surgery admitted in SDM Hospital, Dharwad, Karnataka were studied using intra-operative mucosal samples for microbiological analysis...
March 2018: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/29456197/clinical-usefulness-and-accuracy-of-polymerase-chain-reaction-in-the-detection-of-bacterial-meningitis-agents-in-pediatric-cerebrospinal-fluid
#3
M Nour, A Alaidarous
Bacterial meningitis poses enormous healthcare challenges due to a high mortality, morbidity and sequelae. Neisseria (N.) meningitidis, Haemophilus (H.) influenzae, Streptococcus (S.) pneumoniae and S. agalactiae remain among the most prevalent infectious agents that cause bacterial meningitis in children. The objective of this study was the simultaneous detection of these pathogens in suspected cerebrospinal fluid (CSF) by using multiplex polymerase chain reaction (mPCR) and compare PCR results with standard diagnostics currently used in clinical practice...
February 15, 2018: Current Research in Translational Medicine
https://www.readbyqxmd.com/read/29456071/evaluation-of-sensititre-broth-microdilution-plate-for-determining-the-susceptibility-of-carbapenem-resistant-klebsiella-pneumoniae-to-polymyxins
#4
Sandra S Richter, James Karichu, Joshua Otiso, Hillary Van Heule, George Keller, Eric Cober, Laura J Rojas, Andrea M Hujer, Kristine M Hujer, Steve Marshall, Frederico Perez, Susan D Rudin, T Nicholas Domitrovic, Keith S Kaye, Robert Salata, David van Duin, Robert A Bonomo
Colistin and polymyxin B MICs were determined for 106 carbapenem-resistant Klebsiella pneumoniae (CR-Kp) isolates using Sensititre Research Use Only GNX2F plates (Thermo Fisher) and compared to CLSI broth macrodilution (BMD) as the reference method. For colistin, EUCAST breakpoints were applied and testing of isolates with very major (VM) errors was repeated in duplicate by both methods to determine a majority result. Essential agreement (MIC ± one dilution) of GNX2F with the reference method was 97.1% for polymyxin B and 92...
January 9, 2018: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29455044/timing-of-surgical-site-infection-and-pulmonary-complications-after-laparotomy
#5
Ossian Gundel, Sofie Kirchhoff Gundersen, Rikke Maria Dahl, Lars Nannestad Jørgensen, Lars S Rasmussen, Jørn Wetterslev, Ditte Sæbye, Christian S Meyhoff
BACKGROUND: Surgical site infection (SSI) and other postoperative complications are associated with high costs, morbidity, secondary surgery, and mortality. Many studies have identified factors that may prevent SSI and pulmonary complications, but it is important to know when they in fact occur. The aim of this study was to investigate the diagnostic timing of surgical site infections and pulmonary complications after laparotomy. MATERIAL AND METHODS: This is a secondary analysis of the PROXI trial which was a randomized clinical trial conducted in 1400 patients undergoing elective or emergent laparotomy...
February 15, 2018: International Journal of Surgery
https://www.readbyqxmd.com/read/29455001/evolution-and-molecular-mechanism-of-pitas-in-iron-transport-of-streptococcus-species
#6
Kun Cao, Jing Zhang, Xin-Yu Miao, Qiu-Xia Wei, Xin-Lu Zhao, Qing-Yu He, Xuesong Sun
Iron is an essential element for almost all bacteria. The iron ATP-binding cassette (ABC) transporters located on the cell membrane affects bacterial virulence and infection. Although a variety of Fe3+ -transporters have been found in bacteria, their evolutionary processes are rarely studied. Pneumococcal iron ABC transporter (PitA), a highly conserved Fe3+ -transporter in most pathogenic bacteria, influences the capsule formation and virulence of bacteria. However, multiple sequence alignment revealed that PitA is expressed in four different variants in bacteria, and the structural complexity of these variants increases progressively...
February 10, 2018: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29454879/application-of-genetically-encoded-redox-biosensors-to-measure-dynamic-changes-in-the-glutathione-bacillithiol-and-mycothiol-redox-potentials-in-pathogenic-bacteria
#7
REVIEW
Quach Ngoc Tung, Nico Linzner, Vu Van Loi, Haike Antelmann
Gram-negative bacteria utilize glutathione (GSH) as their major LMW thiol. However, most Gram-positive bacteria do not encode enzymes for GSH biosynthesis and produce instead alternative LMW thiols, such as bacillithiol (BSH) and mycothiol (MSH). BSH is utilized by Firmicutes and MSH is the major LMW thiol of Actinomycetes. LMW thiols are required to maintain the reduced state of the cytoplasm, but are also involved in virulence mechanisms in human pathogens, such as Staphylococcus aureus, Mycobacterium tuberculosis, Streptococcus pneumoniae, Salmonella enterica subsp...
February 15, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29454509/group-c-strep-mediastinitis-a-case-report
#8
Joseph G Kotora, Eric J Schmieler, Christian S McEvoy, Stephen L Noble
This case is significant to the practice of emergency medicine because it represents the development of an uncommon and potentially fatal mediastinal infection from a commonly encountered and appropriately treated community respiratory pathogen. Most published reports on mediastinitis are those that are status-post cardiothoracic surgery. In our report, we discuss a case of a healthy, young individual who developed this morbid entity from extension of a simple respiratory infection where Group C Streptococcus has been isolated as the causative organism, which to our knowledge has not been previously reported...
February 3, 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29452500/preparation-of-an-optimized-ciprofloxacin-loaded-chitosan-nanomicelle-with-enhanced-antibacterial-activity
#9
Mahdieh Farhangi, Farzad Kobarfard, Arash Mahboubi, Alireza Vatanara, Seyed Alireza Mortazavi
OBJECTIVE: The objective of present study was to evaluate the effect of lipid structure on physicochemical properties of chitosan-fatty acid nanomicelles and prepare an optimum ciprofloxacin loaded formulation from these conjugates which could enhance the antibacterial effects of drug against some important pathogens like P. aeroginosa. SIGNIFICANCE: Nowadays, resistance in infectious diseases is a growing worldwide concern. Nanocarriers can increase the therapeutic index and consequently reduce the antibiotic resistance...
February 16, 2018: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/29451368/public-health-response-to-an-imported-case-of-canine-melioidosis
#10
C W Ryan, K Bishop, D D Blaney, S J Britton, F Cantone, C Egan, M G Elrod, C W Frye, A M Maxted, G Perkins
Melioidosis in humans presents variably as fulminant sepsis, pneumonia, skin infection and solid organ abscesses. It is caused by Burkholderia pseudomallei, which in the United States is classified as a select agent, with "potential to pose a severe threat to both human and animal health, to plant health or to animal and plant products" (Federal Select Agent Program, http://www.selectagents.gov/, accessed 22 September 2016). Burkholderia pseudomallei is found in soil and surface water in the tropics, especially South-East Asia and northern Australia, where melioidosis is endemic...
February 16, 2018: Zoonoses and Public Health
https://www.readbyqxmd.com/read/29450151/comparison-of-antimicrobial-activities-of-natural-essential-oils-and-synthetic-fragrances-against-selected-environmental-pathogens
#11
Paula L Vieira-Brock, Brent M Vaughan, David L Vollmer
Plant essential oils (EOs) are known to inhibit the growth of bacteria and fungi. Whether these antimicrobial effects are comparable to synthetic household products is less clear. Furthermore, limited research is available on the potential additive effect of blending EOs. In this investigation, a new EO blend containing orange, patchouli, peppermint, and clary sage was compared to its individual single oils and to three household products-air freshener, liquid soap, and body spray-for their ability to inhibit the growth of Staphylococcus aureus, Streptococcus pneumoniae, Pseudonomas aeruginosa, and Aspergillus brasiliensis in the disc-diffusion assay...
December 2017: Biochimie open
https://www.readbyqxmd.com/read/29449883/production-of-2r-3r-2-3-butanediol-using-engineered-pichia-pastoris-strain-construction-characterization-and-fermentation
#12
Zhiliang Yang, Zisheng Zhang
Background: 2,3-butanediol (2,3-BD) is a bulk platform chemical with various potential applications such as aviation fuel. 2,3-BD has three optical isomers: (2R, 3R)-, (2S, 3S)- and meso-2,3-BD. Optically pure 2,3-BD is a crucial precursor for the chiral synthesis and it can also be used as anti-freeze agent due to its low freezing point. 2,3-BD has been produced in both native and non-native hosts. Several pathogenic bacteria were reported to produce 2,3-BD in mixture of its optical isomers including Klebsiella pneumoniae and Klebsiella oxytoca ...
2018: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/29449425/young-and-middle-aged-adults-with-airflow-limitation-according-to-lower-limit-of-normal-but-not-fixed-ratio-have-high-morbidity-and-poor-survival-a-population-based-prospective-cohort-study
#13
Yunus Çolak, Shoaib Afzal, Børge G Nordestgaard, Jørgen Vestbo, Peter Lange
A presumed consequence of using a fixed ratio for the definition of airflow limitation (AFL) has been overdiagnosis among older and underdiagnosis among younger individuals. However, the prognosis of younger individuals with potentially underdiagnosed airflow limitation is poorly described. We hypothesised that potential underdiagnosis of AFL at younger age is associated with poor prognosis.We assigned 95 288 participants aged 20-100 years from the Copenhagen General Population Study into: individuals without AFL with forced expiratory volume in 1 s (FEV 1 )/forced vital capacity (FVC)≥0...
February 15, 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29448938/comparative-genomic-analysis-of-ten-clinical-streptococcus-pneumoniae-collected-from-a-malaysian-hospital-reveal-31-new-unique-drug-resistant-snps-using-whole-genome-sequencing
#14
Hassan Mahmood Jindal, Babu Ramanathan, Cheng Foh Le, Ranganath Gudimella, Rozaimi Razali, Rishya Manikam, Shamala Devi Sekaran
BACKGROUND: Streptococcus pneumoniae or pneumococcus is a leading cause of morbidity and mortality worldwide, specifically in relation to community-acquired pneumonia. Due to the overuse of antibiotics, S. pneumoniae has developed a high degree of resistance to a wide range of antibacterial drugs. METHODS: In this study, whole genome sequencing (WGS) was performed for 10 clinical strains of S. pneumoniae with different levels of sensitivity to standard antibiotics...
February 15, 2018: Journal of Biomedical Science
https://www.readbyqxmd.com/read/29447989/aetiology-of-lower-respiratory-tract-infection-in-adults-in-primary-care-a-prospective-study-in-11-european-countries
#15
Margareta Ieven, Samuel Coenen, Katherine Loens, Christine Lammens, Frank Coenjaerts, Anouk Vanderstraeten, Birgitta Henriques-Normark, Derrick Crook, Kris Huygen, Chris C Butler, Theo Jm Verheij, Paul Little, Kalina Zlateva, Anton van Loon, Eric Cj Claas, Herman Goossens
OBJECTIVES: To describe the role of bacteria (including bacterial resistance), viruses (including those recently described), and mixed bacterial-viral infections in adults presenting to primary care with lower respiratory tract infection (LRTI). METHODS: We enrolled 3104 adults with LRTI, 141 (4.5%) of whom had community-acquired pneumonia (CAP), and 2985 matched controls in a prospective study in 16 primary care networks in Europe, and followed patients up at 28-35 days...
February 12, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29447449/prognostic-and-pathogenic-role-of-angiopoietin-1-and-2-in-pneumonia
#16
Birgitt Gutbier, Anne-Kathrin Neuhauß, Katrin Reppe, Carolin Ehrler, Ansgar Santel, Jörg Kaufmann, Markus Scholz, Norbert Weissmann, Lars Morawietz, Timothy J Mitchell, Stefano Aliberti, Stefan Hippenstiel, Norbert Suttorp, Martin Witzenrath
RATIONALE: During pneumonia, pathogen-host interaction evokes inflammation and lung barrier dysfunction. Tie2-activation by Angiopoietin-1 reduces, while Tie2-blockade by Angiopoietin-2 increases inflammation and permeability during sepsis. The role of Angiopoietin-1/-2 in pneumonia remains unidentified. OBJECTIVES: To investigate the prognostic and pathogenetic impact of Angiopoietins in regulating pulmonary vascular barrier function and inflammation in bacterial pneumonia...
February 15, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29447024/microbiology-and-clinical-outcomes-of-puerperal-sepsis-a-prospective-cohort-study
#17
Rumbidzai Majangara, Muchabayiwa Francis Gidiri, Zvavahera Mike Chirenje
The objectives of this study were to determine the identity and antibacterial susceptibility profiles of bacteria colonising the female genital tract and blood stream and their association with clinical outcomes in women with puerperal sepsis. A prospective descriptive cohort study was conducted at two tertiary hospitals in Zimbabwe. Endocervical swabs and blood were collected for culture and susceptibility testing from 151 consecutive women who met the World Health Organisation criteria for puerperal sepsis...
February 15, 2018: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29444837/whole-genome-sequence-analysis-of-streptococcus-pneumoniae-strains-that-cause-hospital-acquired-pneumonia-infections
#18
Bin Chang, Masatomo Morita, Ken-Ichi Lee, Makoto Ohnishi
Streptococcus pneumoniae colonizes the nasopharyngeal mucus in healthy individuals and can cause otitis media, pneumonia, and invasive pneumococcal diseases. In this study, we analyzed the S. pneumoniae strains that caused 19 pneumonia episodes in long-term inpatients with severe underlying disease in a hospital during a period of 14 months (from January 2014 to February 2015). Serotyping and whole genome sequencing analyses revealed that 18 of the 19 pneumonia cases were caused by S. pneumoniae strains belonging to 3 genetically distinct groups: clonal complex (CC) 9999, sequence type (ST) 282, and ST166...
February 14, 2018: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29444701/a-case-series-on-common-cold-to-severe-bronchiolitis-and-pneumonia-in-children-following-human-metapneumovirus-infection-in-sri-lanka
#19
J A A S Jayaweera, F Noordeen, S Kothalaweala, F N N Pitchai, M L M Rayes
OBJECTIVES: The prevalence of hMPV infections in Sri Lanka has not been reported and here we report a case series of hMPV infection in children less than 5 years. Patients with ARTI were included from Teaching Hospital, Anuradhapura from March 2013 to August 2014. Indirect fluorescence assay was performed on nasopharyngeal aspirates for the identification of respiratory viruses [respiratory syncytial virus (RSV), parainfluenza virus 1, 2 and 3, influenza A and B and hMPV]. Moreover, reverse transcriptase-polymerase chain reaction was done to further confirm the hMPV infection...
February 14, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29444418/circuitry-rewiring-directly-couples-competence-to-predation-in-the-gut-dweller-streptococcus-salivarius
#20
Johann Mignolet, Laetitia Fontaine, Andrea Sass, Catherine Nannan, Jacques Mahillon, Tom Coenye, Pascal Hols
Small distortions in transcriptional networks might lead to drastic phenotypical changes, especially in cellular developmental programs such as competence for natural transformation. Here, we report a pervasive circuitry rewiring for competence and predation interplay in commensal streptococci. Canonically, in streptococci paradigms such as Streptococcus pneumoniae and Streptococcus mutans, the pheromone-based two-component system BlpRH is a central node that orchestrates the production of antimicrobial compounds (bacteriocins) and incorporates signal from the competence activation cascade...
February 13, 2018: Cell Reports
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