Investigation of a Pandoraea apista cluster common to adult and paediatric cystic fibrosis patients attending two hospitals in the same city.

CONCLUSION: Epidemiological analysis suggested that this cluster could not always be attributed to patient-to-patient transmission. The acquisition of ICE-related virulence factors may have had an impact on its prevalence. PMID: 31210630 [PubMed - as supplied by publisher]
Source: Journal of Medical Microbiology - Category: Microbiology Authors: Tags: J Med Microbiol Source Type: research

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Pseudomonas aeruginosa is an opportunistic pathogen and one of the leading causes of nosocomial infections. Moreover, the species can cause severe infections in cystic fibrosis patients, in burnt victims and caus...
Source: BMC Microbiology - Category: Microbiology Authors: Tags: Research article Source Type: research
Source: Journal of Cystic Fibrosis - Category: Respiratory Medicine Authors: Tags: E-Poster Sessions Source Type: research
Publication date: Available online 7 May 2019Source: Microbiological ResearchAuthor(s): Jobina Rajkumari, Subhomoi Borkotoky, Dhanasekhar Reddy, Saswat Kumar Mohanty, Ranjith Kumavath, Ayaluru Murali, Kitlangki Suchiang, Siddhardha BusiAbstractPseudomonas aeruginosa is one of the most common pathogens associated with nosocomial infections and a great concern to immunocompromised individuals especially in the cases of cystic fibrosis, AIDS and burn wounds. The pathogenicity of P. aeruginosa is largely directed by the quorum sensing (QS) system. Hence, QS may be considered an important therapeutic target to combat P. aerugin...
Source: Microbiological Research - Category: Infectious Diseases Source Type: research
Santosh K. Ghosh1*, Thomas S. McCormick1,2 and Aaron Weinberg1* 1Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, United States 2Dermatology, School of Medicine, Case Western Reserve University, Cleveland, OH, United States Human beta-defensins (hBDs, −1, 2, 3) are a family of epithelial cell derived antimicrobial peptides (AMPs) that protect mucosal membranes from microbial challenges. In addition to their antimicrobial activities, they possess other functions; e.g., cell activation, proliferation, regulation of cytokine/chemokine production, migration, diffe...
Source: Frontiers in Oncology - Category: Cancer & Oncology Source Type: research
Elvira Sondo1, Roberta Bertelli2, Emanuela Pesce1, Gian Marco Ghiggeri2 and Nicoletta Pedemonte1* 1UOC Genetica Medica, IRCCS Istituto Giannina Gaslini, Genova, Italy 2UOC Nefrologia, IRCCS Istituto Giannina Gaslini, Genova, Italy Neutrophils migrate to sites of infection where they phagocytose, degranulate, and/or, in the presence of appropriate stimuli, release decondensed chromatin strands (called neutrophil extracellular traps, NETs) for trapping and possibly killing microorganisms. NET formation is characterized by marked morphological cell changes, in particular within the nucleus. Lytic NET formation can ...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
Poshmaal Dhar1 and Julie McAuley2* 1Faculty of Health, School of Medicine, Deakin University, Geelong, VIC, Australia 2Department of Microbiology and Immunology, Peter Doherty Institute, University of Melbourne, Melbourne, VIC, Australia The family of cell surface (cs-) mucins are constitutively expressed at the cell surface by nearly all epithelial cells, beneath the gel-mucin layer. All cs-mucin family members have structural features that enable them to act as a releasable decoy barrier to mucosal pathogens, by providing ligands for pathogen binding and the ability to shed the bound extracellular domain. Due ...
Source: Frontiers in cellular and infection microbiology - Category: Microbiology Source Type: research
In this study, the full-length PcrV was divided into four domains with the guidance of its structure, and the Nter domain (Met1-Lys127) and H12 domain (Leu251-Ile294) were found to be immunodominant. Subsequently, Nter and H12 were combined with a flexible linker to generate an artificial PcrV derivative (PcrVNH). PcrVNH was successfully produced in E. coli and behaved as a homogenous monomer. Moreover, immunization with PcrVNH elicited a multifactorial immune response and conferred broad protection in an acute PA pneumonia model and was equally effective to full-length PcrV. In addition, passive immunization with anti-Pcr...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
In this study, we identify a hawk-dove game like interspecific relationship between the two Gram-negative opportunistic pathogens Pseudomonas aeruginosa and Klebsiella pneumoniae, which naturally coexist in insect gut and can cocolonize human tissues. Specifically, although P. aeruginosa had significant competitive advantage over cocultured K. pneumoniae on solid medium with rich nutrient factors, K. pneumoniae could resist the suppression of P. aeruginosa by enhancing the expression of membrane transporters induced by the extracellular metabolites of P. aeruginosa. By contrast, under the condition that K. pneumoniae had a...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
Raquel Ferrer-Espada1,2, Xiaojing Liu1,2, Xueping Sharon Goh1,2 and Tianhong Dai1,2* 1Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States 2Vaccine &Immunotherapy Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States Polymicrobial biofilms, in which mixed microbial species are present, play a significant role in persistent infections. Furthermore, polymicrobial biofilms promote antibiotic resistance by allowing interspecies transfer of antibiotic resistance genes. In the present study, we investigated the effec...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
Abstract Pseudomonas aeruginosa is an opportunistic pathogen that causes nosocomial infections most commonly in immunocompromised, cystic fibrosis (CF) and burns patients. The pilin and Pseudomonas lectins 1 (PA-IL) and 2 (PA-IIL) are known glycan-binding proteins of P. aeruginosa that are involved in adherence to host cells, particularly CF host airways. Recently, new P. aeruginosa surface proteins were identified by reverse vaccinology and tested in vivo as potential vaccine antigens. Three of these, namely PSE17-1, PSE41-5 and PSE54, were screened for glycan binding using glycan arrays displaying...
Source: Biochemical and Biophysical Research communications - Category: Biochemistry Authors: Tags: Biochem Biophys Res Commun Source Type: research
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