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Burkholderia cepacia complex

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https://www.readbyqxmd.com/read/28177793/biocontrol-of-i-burkholderia-cepacia-i-complex-bacteria-and-bacterial-phytopathogens-by-i-bdellovibrio-bacteriovorus-i
#1
Damian McNeely, Ryan M Chanyi, James S Dooley, John E Moore, Susan F Koval
<i>Bdellovibrio</i> and like organisms are predatory bacteria that have the unusual property of using the cytoplasmic constituents of other Gram-negative bacteria as nutrients. These predators may thus provide an alternative approach to the biocontrol of human and plant pathogens. Predators were isolated in enrichment cultures with soil and sewage on <i>Burkholderia cenocepacia</i> strains K56-2 and J2315 as prey cells. Three isolates (DM7C, DM8A and DM11A) were identified as <i>Bdellovibrio bacteriovorus</i> based on morphology, a periplasmic life cycle and 16S rRNA gene sequencing...
December 22, 2016: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28166854/an-outbreak-of-burkholderia-cepacia-complex-infections-associated-with-contaminated-liquid-docusate
#2
Lucila Marquez, Katie N Jones, Elaine M Whaley, Tjin H Koy, Paula A Revell, Ruston S Taylor, M Brooke Bernhardt, Jeffrey L Wagner, James J Dunn, John J LiPuma, Judith R Campbell
OBJECTIVE To investigate an outbreak of Burkholderia cepacia complex and describe the measures that revealed the source. SETTING A 629-bed, tertiary-care, pediatric hospital in Houston, Texas. PATIENTS Pediatric patients without cystic fibrosis (CF) hospitalized in the pediatric and cardiovascular intensive care units. METHODS We investigated an outbreak of B. cepacia complex from February through July 2016. Isolates were evaluated for molecular relatedness with repetitive extragenic palindromic polymerase chain reaction (rep-PCR); specific species identification and genotyping were performed at an independent laboratory...
February 7, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28164789/preliminary-data-on-antibacterial-activity-of-echinacea-purpurea-associated-bacterial-communities-against-burkholderia-cepacia-complex-strains-opportunistic-pathogens-of-cystic-fibrosis-patients
#3
Carolina Chiellini, Isabel Maida, Valentina Maggini, Emanuele Bosi, Stefano Mocali, Giovanni Emiliani, Elena Perrin, Fabio Firenzuoli, Alessio Mengoni, Renato Fani
Burkholderia cepacia complex bacteria (Bcc) represent a serious threat for immune-compromised patient affected by Cystic Fibrosis (CF) since they are resistant to many substances and to most antibiotics. For this reason, the research of new natural compounds able to inhibit the growth of Bcc strains has raised new interest during the last years. A source of such natural compounds is represented by medicinal plants and, in particular, by bacterial communities associated with these plants able to produce molecules with antimicrobial activity...
March 2017: Microbiological Research
https://www.readbyqxmd.com/read/28120710/the-role-of-universal-stress-proteins-in-bacterial-infections
#4
Andrew O Connor, Siobhán McClean
Universal stress proteins are ubiquitously expressed in bacteria, archaea and plants and other eukaryotes. A general property of USPs is their role in adaptation of bacteria to oxidative stress, high temperature, low pH and/or hypoxia. There is increasing evidence that these proteins facilitate the adaption of bacterial pathogens to the human host environment, thereby facilitating colonisation and pathogenicity. USPs in Mycobacterium tuberculosis are well studied and may play a role in latency of tuberculosis...
January 24, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28106859/burkholderia-cepacia-complex-regulation-of-virulence-gene-expression-a-review
#5
REVIEW
Sílvia A Sousa, Joana R Feliciano, Tiago Pita, Soraia I Guerreiro, Jorge H Leitão
Burkholderia cepacia complex (Bcc) bacteria emerged as opportunistic pathogens in cystic fibrosis and immunocompromised patients. Their eradication is very difficult due to the high level of intrinsic resistance to clinically relevant antibiotics. Bcc bacteria have large and complex genomes, composed of two to four replicons, with variable numbers of insertion sequences. The complexity of Bcc genomes confers a high genomic plasticity to these bacteria, allowing their adaptation and survival to diverse habitats, including the human host...
January 19, 2017: Genes
https://www.readbyqxmd.com/read/28046077/an-oxygen-sensing-two-component-system-in-the-burkholderia-cepacia-complex-regulates-biofilm-intracellular-invasion-and-pathogenicity
#6
Matthew M Schaefers, Tiffany L Liao, Nicole M Boisvert, Damien Roux, Deborah Yoder-Himes, Gregory P Priebe
Burkholderia dolosa is a member of the Burkholderia cepacia complex (BCC), which is a group of bacteria that cause chronic lung infection in patients with cystic fibrosis (CF) and can be associated with outbreaks carrying high morbidity and mortality. While investigating the genomic diversity of B. dolosa strains collected from an outbreak among CF patients, we previously identified fixL as a gene showing signs of strong positive selection. This gene has homology to fixL of the rhizobial FixL/FixJ two-component system...
January 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/27989956/pseudoalteromonas-haloplanktis-produces-methylamine-a-volatile-compound-active-against-burkholderia-cepacia-complex-strains
#7
Filomena Sannino, Ermenegilda Parrilli, Gennaro Antonio Apuzzo, Donatella de Pascale, Pietro Tedesco, Isabel Maida, Elena Perrin, Marco Fondi, Renato Fani, Gennaro Marino, Maria Luisa Tutino
The Antarctic marine bacterium Pseudoalteromonas haloplanktis TAC125 has been reported to produce several Volatile Organic Compounds (VOCs), which are able to inhibit the growth of Burkholderia cepacia complex (Bcc) strains, opportunistic pathogens responsible for the infection of immune-compromised patients. However, no specific antibacterial VOCs have been identified to date. The purpose of the present study was to identify specific VOCs that contribute to Bcc inhibition by the Antarctic strain. When grown on defined medium containing D-gluconate and L-glutamate as carbon, nitrogen and energy sources, P...
March 25, 2017: New Biotechnology
https://www.readbyqxmd.com/read/27987042/using-dendritic-cells-to-evaluate-how-burkholderia-cenocepacia-clonal-isolates-from-a-chronically-infected-cystic-fibrosis-patient-subvert-immune-functions
#8
M Guadalupe Cabral, Marília Pereira, Zélia Silva, Inês Iria, Carla Coutinho, Andreia Lopes, Isabel Sá-Correia, Paula A Videira
Infection with Burkholderia cepacia complex (Bcc) bacteria is a threat to cystic fibrosis (CF) patients, commonly leading to a fatal pneumonia, the cepacia syndrome. It causes a massive production of pro-inflammatory cytokines and leucocyte recruitment to airway epithelium without resolving infection and contributing to tissue lesion. To dissect how Bcc bacteria subvert the immune response, we developed a co-culture model with human dendritic cells (DCs) and B. cenocepacia clonal variants isolated from a chronically infected CF patient, who died with cepacia syndrome...
December 16, 2016: Medical Microbiology and Immunology
https://www.readbyqxmd.com/read/27895902/effect-of-%C3%AE-lactamase-inhibitors-on-in-vitro-activity-of-%C3%AE-lactam-antibiotics-against-burkholderia-cepacia-complex-species
#9
Annelien Everaert, Tom Coenye
BACKGROUND: Bacteria belonging to the Burkholderia cepacia complex (Bcc) are an important cause of chronic respiratory tract infections in cystic fibrosis patients. Intrinsic resistance to a wide range of antimicrobial agents, including a variety of β-lactam antibiotics, is frequently observed in Bcc strains. Resistance to β-lactams is most commonly mediated by efflux pumps, alterations in penicillin-binding proteins or the expression of β-lactamases. β-lactamase inhibitors are able to restore the in vitro activity of β-lactam molecules against a variety of Gram-negative species, but the effect of these inhibitors on the activity of β-lactam treatment against Bcc species is still poorly investigated...
2016: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/27889717/profile-of-neonatal-sepsis-due-to-burkholderia-capacia-complex
#10
Aparna Chandrasekaran, Nivedhana Subburaju, Muzamil Mustafa, Sulochana Putlibai
We report the result of retrospective record review of the clinical profile of 59 neonates who presented to a tertiary-care extramural neonatal unit with Burkholderia cepacia complex infection. Among the 3265 admissions over 45 months, incidence of Burkholderia sepsis was 18 per 1000 admissions. Case fatality rate was 17%. Most (95%) isolates were sensitive to cotrimoxazole.
December 15, 2016: Indian Pediatrics
https://www.readbyqxmd.com/read/27886433/the-burkholderia-cenocepacia-peptidoglycan-associated-lipoprotein-is-involved-in-epithelial-cell-attachment-and-elicitation-of-inflammation
#11
Ruth Dennehy, Maria Romano, Alessia Ruggiero, Yasmine F Mohamed, Simon L Dignam, Cristóbal Mujica Troncoso, Máire Callaghan, Miguel A Valvano, Rita Berisio, Siobhán McClean
The Burkholderia cepacia complex (Bcc) is a group of Gram-negative opportunistic pathogens causing infections in people with cystic fibrosis (CF). Bcc is highly antibiotic resistant, making conventional antibiotic treatment problematic. The identification of novel targets for anti-virulence therapies should improve therapeutic options for infected CF patients. We previously identified that the peptidoglycan-associated lipoprotein (Pal) was immunogenic in Bcc infected CF patients; however, its role in Bcc pathogenesis is unknown...
November 7, 2016: Cellular Microbiology
https://www.readbyqxmd.com/read/27879334/intrinsic-resistance-of-burkholderia-cepacia-complex-to-benzalkonium-chloride
#12
Youngbeom Ahn, Jeong Myeong Kim, Ohgew Kweon, Seong-Jae Kim, Richard C Jones, Kellie Woodling, Gonçalo Gamboa da Costa, John J LiPuma, David Hussong, Bernard S Marasa, Carl E Cerniglia
: Pharmaceutical products that are contaminated with Burkholderia cepacia complex (BCC) bacteria may pose serious consequences to vulnerable patients. Benzyldimethylalkylammonium chloride (BZK) cationic surfactants are extensively used in medical applications and have been implicated in the coselection of antimicrobial resistance. The ability of BCC to degrade BZK, tetradecyldimethylbenzylammonium chloride (C14BDMA-Cl), dodecyldimethylbenzylammonium chloride (C12BDMA-Cl), decyldimethylbenzylammonium chloride (C10BDMA-Cl), hexyldimethylbenzylammonium chloride, and benzyltrimethylammonium chloride was determined by incubation in 1/10-diluted tryptic soy broth (TSB) to determine if BCC bacteria have the ability to survive and inactivate these disinfectants...
November 22, 2016: MBio
https://www.readbyqxmd.com/read/27872073/exploring-the-role-of-the-%C3%AE-loop-in-the-evolution-of-ceftazidime-resistance-in-the-pena-%C3%AE-lactamase-from-burkholderia-multivorans-an-important-cystic-fibrosis-pathogen
#13
Krisztina M Papp-Wallace, Scott A Becka, Magdalena A Taracila, Elise T Zeiser, Julian A Gatta, John J LiPuma, Robert A Bonomo
The unwelcome evolution of resistance to the advanced generation cephalosporin antibiotic, ceftazidime is hindering the effective therapy of Burkholderia cepacia complex (BCC) infections. Regrettably, BCC organisms are highly resistant to most antibiotics, including polymyxins; ceftazidime and trimethoprim-sulfamethoxazole are the most effective treatment options. Unfortunately, resistance to ceftazidime is increasing and posing a health threat to populations susceptible to BCC infection. We found that up to 36% of 146 tested BCC clinical isolates were nonsusceptible to ceftazidime (MICs ≥ 8 μg/ml)...
February 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27856590/complete-genome-sequences-for-three-chromosomes-of-the-burkholderia-stabilis-type-strain-atcc-baa-67
#14
Julia V Bugrysheva, Blake Cherney, David Sue, Andrew B Conley, Lori A Rowe, Kristen M Knipe, Michael A Frace, Vladimir N Loparev, Julie R Avila, Kevin Anderson, David R Hodge, Segaran P Pillai, Linda M Weigel
We report here the complete annotated genome sequence of the Burkholderia stabilis type strain ATCC BAA-67. There were three circular chromosomes with a combined size of 8,527,947 bp and G+C composition of 66.4%. These characteristics closely resemble the genomes of other sequenced members of the Burkholderia cepacia complex.
November 17, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27825973/an-efficient-system-for-the-generation-of-marked-genetic-mutants-in-members-of-the-genus-burkholderia
#15
Sravanthi Shastri, Helena L Spiewak, Aderonke Sofoluwe, Vigdis A Eidsvaag, Atif H Asghar, Tyrone Pereira, Edward H Bull, Aaron T Butt, Mark S Thomas
To elucidate the function of a gene in bacteria it is vital that targeted gene inactivation (allelic replacement) can be achieved. Allelic replacement is often carried out by disruption of the gene of interest by insertion of an antibiotic-resistance marker followed by subsequent transfer of the mutant allele to the genome of the host organism in place of the wild-type gene. However, due to their intrinsic resistance to many antibiotics only selected antibiotic-resistance markers can be used in members of the genus Burkholderia, including the Burkholderia cepacia complex (Bcc)...
November 5, 2016: Plasmid
https://www.readbyqxmd.com/read/27804115/eradication-therapy-for-burkholderia-cepacia-complex-in-people-with-cystic-fibrosis
#16
REVIEW
Kate H Regan, Jayesh Bhatt
BACKGROUND: Chronic infection with Burkholderia cepacia complex species remains a significant problem for clinicians treating people with cystic fibrosis. Colonisation with Burkholderia cepacia complex species is linked to a more rapid decline in lung function and increases morbidity and mortality. There remain no objective guidelines for strategies to eradicate Burkholderia cepacia complex in cystic fibrosis lung disease, as these are inherently resistant to the majority of antibiotics and there has been very little research in this area...
2, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27789640/draft-genome-sequences-of-burkholderia-contaminans-ffi-28-a-strain-isolated-from-a-contaminated-pharmaceutical-solution
#17
Maria Sol Haim, Marta Mollerach, Gary Van Domselaar, Sergio A Teves, José Degrossi, Silvia T Cardona
Burkholderia contaminans is a species of the Burkholderia cepacia complex, a group of bacteria that can grow in pharmaceutical products and are capable of infecting the immunocompromised and people with cystic fibrosis. Here, we report draft genome sequences for Burkholderia contaminans FFI-28, a strain isolated from a contaminated pharmaceutical solution.
October 27, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27776248/protein-protein-interaction-and-molecular-dynamics-analysis-for-identification-of-novel-inhibitors-in-burkholderia-cepacia-gg4
#18
Money Gupta, Rashi Chauhan, Yamuna Prasad, Gulshan Wadhwa, Chakresh Kumar Jain
The lack of complete treatments and appearance of multiple drug-resistance strains of Burkholderia cepacia complex (Bcc) are causing an increased risk of lung infections in cystic fibrosis patients. Bcc infection is a big risk to human health and demands an urgent need to identify new therapeutics against these bacteria. Network biology has emerged as one of the prospective hope in identifying novel drug targets and hits. We have applied protein-protein interaction methodology to identify new drug-target candidates (orthologs) in Burkhloderia cepacia GG4, which is an important strain for studying the quorum-sensing phenomena...
October 8, 2016: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/27767197/multilocus-sequence-analysis-reveals-high-genetic-diversity-in-clinical-isolates-of-burkholderia-cepacia-complex-from-india
#19
Vikas Gautam, Prashant P Patil, Sunil Kumar, Samriti Midha, Mandeep Kaur, Satinder Kaur, Meenu Singh, Swapna Mali, Jayanthi Shastri, Anita Arora, Pallab Ray, Prabhu B Patil
Burkholderia cepacia complex (Bcc) is a complex group of bacteria causing opportunistic infections in immunocompromised and cystic fibrosis (CF) patients. Herein, we report multilocus sequence typing and analysis of the 57 clinical isolates of Bcc collected over the period of seven years (2005-2012) from several hospitals across India. A total of 21 sequence types (ST) including two STs from cystic fibrosis patient's isolates and twelve novel STs were identified in the population reflecting the extent of genetic diversity...
October 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27731634/screening-complex-biological-samples-with-peptide-microarrays-the-favorable-impact-of-probe-orientation-via-chemoselective-immobilization-strategies-on-clickable-polymeric-coatings
#20
Alessandro Gori, Laura Sola, Paola Gagni, Giulia Bruni, Marta Liprino, Claudio Peri, Giorgio Colombo, Marina Cretich, Marcella Chiari
The generation of robust analytical data using microarray platforms strictly relies on optimal ligand-target interaction at the sensor surface, which, in turn, is inherently bound to the correct immobilization scheme of the interrogated bioprobes. In the present work, we performed a rigorous comparative analysis of the impact of peptide ligands immobilization strategy in the screening of Burkholderia cepacia complex (BCC) infections in patients affected by cystic fibrosis (CF). We generated arrays of previously validated Burkholderia derived peptide probes that were selectively oriented on polymeric coatings by means of different click-type reactions including thiol maleimide, copper-catalyzed azide-alkyne cycloaddition (CuAAC), and strain-promoted azide-alkyne cycloaddition (SPAAC)...
November 16, 2016: Bioconjugate Chemistry
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