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Burkholderia pseudomallei

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https://www.readbyqxmd.com/read/28910350/phylogeographic-genomic-and-meropenem-susceptibility-analysis-of-burkholderia-ubonensis
#1
Erin P Price, Derek S Sarovich, Jessica R Webb, Carina M Hall, Sierra A Jaramillo, Jason W Sahl, Mirjam Kaestli, Mark Mayo, Glenda Harrington, Anthony L Baker, Lindsay C Sidak-Loftis, Erik W Settles, Madeline Lummis, James M Schupp, John D Gillece, Apichai Tuanyok, Jeffrey Warner, Joseph D Busch, Paul Keim, Bart J Currie, David M Wagner
The bacterium Burkholderia ubonensis is commonly co-isolated from environmental specimens harbouring the melioidosis pathogen, Burkholderia pseudomallei. B. ubonensis has been reported in northern Australia and Thailand but not North America, suggesting similar geographic distribution to B. pseudomallei. Unlike most other Burkholderia cepacia complex (Bcc) species, B. ubonensis is considered non-pathogenic, although its virulence potential has not been tested. Antibiotic resistance in B. ubonensis, particularly towards drugs used to treat the most severe B...
September 14, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28903988/the-use-of-reverse-vaccinology-in-the-design-and-construction-of-nano-glycoconjugate-vaccines-against-burkholderia-pseudomallei
#2
Laura A Muruato, Daniel Tapia, Christopher L Hatcher, Mridul Kalita, Paul J Brett, Anthony E Gregory, James E Samuel, Richard W Titball, Alfredo G Torres
Burkholderia pseudomallei (Bpm) is a Gram negative, facultative intracellular pathogen that causes the disease melioidosis in humans and other mammals. Respiratory infection with B. pseudomallei leads to a fulminant and often fatal disease. It has previously been shown that glycoconjugate vaccines can provide significant protection against lethal challenge; however, the limited number of known Burkholderia antigens has slowed progress towards vaccine development. The objective of this study was to identify novel antigens and evaluate their protective capacity when incorporated into a nano-glycoconjugate vaccine platform...
September 13, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28902845/clinical-and-epidemiologic-characteristics-of-dengue-and-other-etiologic-agents-among-patients-with-acute-febrile-illness-puerto-rico-2012-2015
#3
Kay M Tomashek, Olga D Lorenzi, Doris A Andújar-Pérez, Brenda C Torres-Velásquez, Elizabeth A Hunsperger, Jorge Luis Munoz-Jordan, Janice Perez-Padilla, Aidsa Rivera, Gladys E Gonzalez-Zeno, Tyler M Sharp, Renee L Galloway, Mindy Glass Elrod, Demetrius L Mathis, M Steven Oberste, W Allan Nix, Elizabeth Henderson, Jennifer McQuiston, Joseph Singleton, Cecilia Kato, Carlos García Gubern, William Santiago-Rivera, Jesús Cruz-Correa, Robert Muns-Sosa, Juan D Ortiz-Rivera, Gerson Jiménez, Ivonne E Galarza, Kalanthe Horiuchi, Harold S Margolis, Luisa I Alvarado
Identifying etiologies of acute febrile illnesses (AFI) is challenging due to non-specific presentation and limited availability of diagnostics. Prospective AFI studies provide a methodology to describe the syndrome by age and etiology, findings that can be used to develop case definitions and multiplexed diagnostics to optimize management. We conducted a 3-year prospective AFI study in Puerto Rico. Patients with fever ≤7 days were offered enrollment, and clinical data and specimens were collected at enrollment and upon discharge or follow-up...
September 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28902844/melioidosis-in-lower-provincial-cambodia-a-case-series-from-a-prospective-study-of-sepsis-in-takeo-province
#4
Kevin L Schully, Catherine M Berjohn, Angela M Prouty, Amitha Fitkariwala, Tin Som, Darith Sieng, Michael J Gregory, Andrew Vaughn, Sim Kheng, Vantha Te, Christopher A Duplessis, James V Lawler, Danielle V Clark
Melioidosis is a severe infectious disease caused by the gram-negative soil bacterium Burkholderia pseudomallei. Melioidosis is well known to be a major cause of morbidity and mortality in Southeast Asia, particularly in Thailand. However, melioidosis remains underreported in surrounding areas such as Cambodia. We report a case series of melioidosis in seven patients from Takeo Province, Cambodia. The patients, aged 24-65 years, were enrolled from May 2014 to May 2015 during a one year prospective study of sepsis at Takeo Provincial Hospital...
September 13, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28890761/hypothetical-protein-bpsl3393-of-burkholderia-pseudomallei-is-involved-in-ethanolamine-catabolism
#5
Ooi Gim Luan, Hokchai Yam, Razip Samian, Mustafa Fadzil Farid Wajidi, Nor Muhammad Mahadi, Suriani Mohamad, Nazalan Najimudin
Burkholderia pseudomallei is a soil-dwelling bacterium that causes a globally emerging disease called melioidosis. Approximately one third of the in silico annotated genes in its genome are classified as hypothetical genes. This group of genes is difficult to be functionally characterised partly due to the absence of noticeable phenotypes under conventional laboratory settings. A bioinformatic survey of hypothetical genes revealed a gene designated as BPSL3393 that putatively encodes a small protein of 11 kDA with a CoA binding domain...
July 2017: Tropical Life Sciences Research
https://www.readbyqxmd.com/read/28874476/mechanisms-of-resistance-to-folate-pathway-inhibitors-in-burkholderia-pseudomallei-deviation-from-the-norm
#6
Nicole L Podnecky, Katherine A Rhodes, Takehiko Mima, Heather R Drew, Sunisa Chirakul, Vanaporn Wuthiekanun, James M Schupp, Derek S Sarovich, Bart J Currie, Paul Keim, Herbert P Schweizer
The trimethoprim and sulfamethoxazole combination, co-trimoxazole, plays a vital role in the treatment of Burkholderia pseudomallei infections. Previous studies demonstrated that the B. pseudomallei BpeEF-OprC efflux pump confers widespread trimethoprim resistance in clinical and environmental isolates, but this is not accompanied by significant resistance to co-trimoxazole. Using the excluded select-agent strain B. pseudomallei Bp82, we now show that in vitro acquired trimethoprim versus co-trimoxazole resistance is mainly mediated by constitutive BpeEF-OprC expression due to bpeT mutations or by BpeEF-OprC overexpression due to bpeS mutations...
September 5, 2017: MBio
https://www.readbyqxmd.com/read/28861207/clinical-outcomes-in-musculoskeletal-involvement-of-burkholderia-pseudomallei-infection
#7
Mohamad Gouse, Viswanath Jayasankar, Shalom Patole, Balaji Veeraraghavan, Manasseh Nithyananth
BACKGROUND: Musculoskeletal involvement in melioidosis is often seen in conjunction with a disseminated illness. Recent reports suggest that operative management of musculoskeletal melioidosis has favourable results. The purpose of this study was to review the patient profile and clinical outcomes of Burkholderia pseudomallei infection in the musculoskeletal system. METHODS: Hospital records of 163 patients who were diagnosed to have B. pseudomallei infection between January 2009 and December 2014 were reviewed...
September 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/28856457/mitogen-activated-protein-kinases-mapks-are-modulated-during-in-vitro-and-in-vivo-infection-with-the-intracellular-bacterium-burkholderia-pseudomallei
#8
R V D'Elia, R J Saint, S L Newstead, G C Clark, H S Atkins
Burkholderia pseudomallei is a Gram-negative intracellular bacterium that causes the disease melioidosis. The disease can be fatal if left untreated or when antibiotic therapy is delayed and total clearance of the pathogen from the host is often not accomplished with current therapies. Thus, new therapeutic approaches for the treatment of infections caused by B. pseudomallei are required. To better understand host responses to B. pseudomallei infection, the activation of key proteins involved in the TLR inflammatory cascade was measured by western blotting...
August 30, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28852470/investigation-of-host-pathogen-interaction-between-burkholderia-pseudomallei-and-autophagy-related-protein-lc3-using-hydrophobic-chromatography-based-technique
#9
Pattamaporn Joompa, Saranyoo Ponnikorn, Sittiruk Roytrakul, Sumalee Tungpradabkul
BACKGROUND: Burkholderia pseudomallei is an intracellular bacteria causing Melioidosis, the disease widely disseminates in Southeast Asia and Northern Australia. B. pseudomallei has ability to invade various types of host cell and to interfere with host defense mechanisms, such as nitric oxide (NO). Due to the cross-talk among alternative killing mechanisms in host immune response against invading microbes, autophagy is the molecular mechanism belonging to intracellular elimination of eukaryotic cells that has been widely discussed...
2017: Cell & Bioscience
https://www.readbyqxmd.com/read/28827633/host-adaptation-of-burkholderia-pseudomallei-alters-metabolism-and-virulence-a-global-proteome-analysis
#10
Vanitha Mariappan, Kumutha Malar Vellasamy, Jamuna Vadivelu
Little is known about the evolution, adaptation and pathogenesis of Burkholderia pseudomallei within host during acute melioidosis infection. Melioidosis is a potential life threatening disease contracted through inhalation, ingestion, inoculation or direct entry of the organism into the blood stream via wounds or skin abrasions from contaminated soil and water. Environmental B. pseudomallei strain (Bp MARAN ), isolated during a melioidosis outbreak in Pahang, Malaysia was injected intra-peritoneally into a mouse and passaged strain was recovered from spleen (Bpmouse-adapted)...
August 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28827286/anti-cancer-drug-hmba-acts-as-an-adjuvant-during-intracellular-bacterial-infections-by-inducing-type-i-ifn-through-sting
#11
Akshamal Mihiranga Gamage, Kok-Onn Lee, Yunn-Hwen Gan
The anti-proliferative agent hexamethylene bisacetamide (HMBA) belongs to a class of hybrid bipolar compounds developed more than 30 y ago for their ability to induce terminal differentiation of transformed cells. Recently, HMBA has also been shown to trigger HIV transcription from latently infected cells, via a CDK9/HMBA inducible protein-1 dependent process. However, the effect of HMBA on the immune response has not been explored. We observed that pretreatment of human peripheral blood mononuclear cells with HMBA led to a markedly increased production of IL-12 and IFN-γ, but not of TNF-α, IL-6, and IL-8 upon subsequent infection with Burkholderia pseudomallei and Salmonella enterica HMBA treatment was also associated with better intracellular bacterial control...
August 21, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28820897/persistent-infection-due-to-a-small-colony-variant-of-burkholderia-pseudomallei-leads-to-pd-1-upregulation-on-circulating-immune-cells-and-mononuclear-infiltration-in-viscera-of-experimental-balb-c-mice
#12
Jia-Xiang See, Samudi Chandramathi, Mahmood Ameen Abdulla, Jamuna Vadivelu, Esaki M Shankar
BACKGROUND: Melioidosis is a neglected tropical disease endemic across South East Asia and Northern Australia. The etiological agent, Burkholderia pseudomallei (B.pseudomallei), is a Gram-negative, rod-shaped, motile bacterium residing in the soil and muddy water across endemic regions of the tropical world. The bacterium is known to cause persistent infections by remaining latent within host cells for prolonged duration. Reactivation of the recrudescent disease often occurs in elders whose immunity wanes...
August 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28791299/differential-microrna-analyses-of-burkholderia-pseudomallei-and-francisella-tularensis-exposed-hpbmcs-reveal-potential-biomarkers
#13
Regina Z Cer, J Enrique Herrera-Galeano, Kenneth G Frey, Kevin L Schully, Truong V Luu, John Pesce, Vishwesh P Mokashi, Andrea M Keane-Myers, Kimberly A Bishop-Lilly
Increasing evidence that microRNAs (miRNAs) play important roles in the immune response against infectious agents suggests that miRNA might be exploitable as signatures of exposure to specific infectious agents. In order to identify potential early miRNA biomarkers of bacterial infections, human peripheral blood mononuclear cells (hPBMCs) were exposed to two select agents, Burkholderia pseudomallei K96243 and Francisella tularensis SHU S4, as well as to the nonpathogenic control Escherichia coli DH5α. RNA samples were harvested at three early time points, 30, 60, and 120 minutes postexposure, then sequenced...
2017: International Journal of Genomics
https://www.readbyqxmd.com/read/28790983/nitrate-sensing-and-metabolism-inhibit-biofilm-formation-in-the-opportunistic-pathogen-burkholderia-pseudomallei-by-reducing-the-intracellular-concentration-of-c-di-gmp
#14
Mihnea R Mangalea, Brooke A Plumley, Bradley R Borlee
The opportunistic pathogen Burkholderia pseudomallei is a saprophytic bacterium and the causative agent of melioidosis, an emerging infectious disease associated with high morbidity and mortality. Although melioidosis is most prevalent during the rainy season in endemic areas, domestic gardens and farms can also serve as a reservoir for B. pseudomallei during the dry season, in part due to irrigation and fertilizer use. In the environment, B. pseudomallei forms biofilms and persists in soil near plant root zones...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28780059/a-simple-laboratory-algorithm-for-diagnosis-of-melioidosis-in-resource-constrained-areas-a-study-from-north-central-vietnam
#15
T T Trinh, T S Hoang, D A Tran, V T Trinh, A Göhler, T T Nguyen, S N Hoang, R Krumkamp, L T N Nguyen, J May, P M Doan, C D Do, T A Que, I Steinmetz
OBJECTIVE: Melioidosis may be endemic in many tropical developing countries but diagnosis of the disease is currently unreliable in resource-limited areas. Here we aimed to validate a simple and cheap laboratory algorithm for the identification of Burkholderia pseudomallei from clinical specimens in parts of Vietnam where the disease has not been reported before. METHODS: In June 2015, we conducted training courses at five general hospitals in north central provinces in order to raise awareness of the disease and to introduce a simple and cheap laboratory identification algorithm for B...
August 2, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28770177/bipc-a-predicted-burkholderia-pseudomallei-type-3-secretion-system-translocator-protein-with-actin-binding-activity
#16
Charles W Vander Broek, Nurhamimah Zainal Abidin, Joanne M Stevens
Burkholderia pseudomallei is an intracellular bacterial pathogen and the causative agent of melioidosis, a severe disease of humans and animals. Like other clinically important Gram-negative bacteria, fundamental to B. pseudomallei pathogenesis is the Bsa Type III Secretion System. The Bsa system injects bacterial effector proteins into the cytoplasm of target host cells subverting cellular pathways for the benefit of the bacteria. It is required for invasion of non-phagocytic host cells, escape from the endocytic compartment into the host cell cytoplasm, and for virulence in murine models of melioidosis...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28764662/a-case-report-of-co-infection-of-melioidosis-and-cutaneous-leishmaniasis
#17
Isuru Chamika Indeewara Kahandawaarachchi, Gayani Samadara Premawansa, Wipula Warnasuriya, Malka Dassanayake, Enoka Corea
BACKGROUND: Leishmaniasis and melioidosis are frequently reported from the North Central Province of Sri Lanka. However, only one case of co-infection of the two diseases has been reported to date over the world. This is a case report of a patient who had co-infection with cutaneous leishmaniasis and melioidosis and was successfully treated and recovered from the illness. CASE PRESENTATION: A 61 year old female patient with diabetes mellitus presented with fever for one month's duration and was found to have hepatosplenomegaly and an ulcer over the left arm...
August 1, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28760929/entry-intracellular-survival-and-multinucleated-giant-cell-forming-activity-of-burkholderia-pseudomallei-in-human-primary-phagocytic-and-non-phagocytic-cells
#18
Liam Whiteley, Teresa Meffert, Maria Haug, Christopher Weidenmaier, Verena Hopf, Katharina Bitschar, Birgit Schittek, Christian Kohler, Ivo Steinmetz, T Eoin West, Sandra Schwarz
The human pathogen Burkholderia pseudomallei and the related species Burkholderia thailandensis are facultative intracellular bacteria characterized by the ability to escape into the cytosol of the host cell and to stimulate the formation of multinucleated giant cells (MNGCs). MNGC formation is induced via an unknown mechanism by the bacterial type VI secretion system 5 (T6SS-5), which is an essential virulence factor in both species. Despite the vital role of the intracellular life cycle in the pathogenesis of the bacteria, the range of host cell types permissive for initiation and completion of the intracellular cycle is poorly defined...
July 31, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28740137/deciphering-minimal-antigenic-epitopes-associated-with-burkholderia-pseudomallei-and-burkholderia-mallei-lipopolysaccharide-o-antigens
#19
Marielle Tamigney Kenfack, Marcelina Mazur, Teerapat Nualnoi, Teresa L Shaffer, Abba Ngassimou, Yves Blériot, Jérôme Marrot, Roberta Marchetti, Kitisak Sintiprungrat, Narisara Chantratita, Alba Silipo, Antonio Molinaro, David P AuCoin, Mary N Burtnick, Paul J Brett, Charles Gauthier
Burkholderia pseudomallei (Bp) and Burkholderia mallei (Bm), the etiologic agents of melioidosis and glanders, respectively, cause severe disease in both humans and animals. Studies have highlighted the importance of Bp and Bm lipopolysaccharides (LPS) as vaccine candidates. Here we describe the synthesis of seven oligosaccharides as the minimal structures featuring all of the reported acetylation/methylation patterns associated with Bp and Bm LPS O-antigens (OAgs). Our approach is based on the conversion of an L-rhamnose into a 6-deoxy-L-talose residue at a late stage of the synthetic sequence...
July 24, 2017: Nature Communications
https://www.readbyqxmd.com/read/28729203/epidemiological-cut-off-value-of-clinical-isolates-of-burkholderia-pseudomallei-from-northern-queensland-to-meropenem-ceftazidime-trimethoprim-sulfamethoxazole-and-doxycycline-by-the-microbroth-dilution-method
#20
Samuel Maloney, Cathy Engler, Robert Norton
OBJECTIVES: Melioidosis is caused by the bacterium Burkholderia pseudomallei. The most common antibiotics used to treat melioidosis in Australia are meropenem, ceftazidime, trimethoprim/sulfamethoxazole (SXT) and doxycycline. The European Committee on Antimicrobial Susceptibility Testing (EUCAST) and Clinical and Laboratory Standards Institute (CLSI) do not provide standards for assessing the susceptibility of B. pseudomallei for these agents. The International Standards Organisation (ISO) microbroth dilution method is accepted both by the CLSI and EUCAST as the gold standard of antimicrobial susceptibility testing...
September 2017: Journal of Global Antimicrobial Resistance
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