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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/28902844/melioidosis-in-lower-provincial-cambodia-a-case-series-from-a-prospective-study-of-sepsis-in-takeo-province
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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/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
#10
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/28791214/cavitary-lung-lesions-melioidosis-and-pulmonary-embolism-causing-necrotizing-pneumonia
#11
N Mohammad, W S Wan Ghazali
Cavitary lung lesions of various etiologies may be encountered in patients with respiratory symptoms associated with fever. Non-malignant cavitary lesions may mimic malignant lung lesions on most of radiographic modalities including chest radiographs or thoracic computed tomography (CT). Primary lung malignancy can be detected in as high as one-fifths of CT thorax as cavitary lesions and the remaining aetiologies may be due to bacterial, parasitic, and invasive fungal infections, as well as Granulomatosis with polyangiitis (GPA), sarcoidosis, septic thrombo-embolism, and lung metastasis from extra-pulmonary primaries...
2017: IDCases
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
#12
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
#13
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
#14
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
#15
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/28763150/pneumonia-in-the-tropics
#16
REVIEW
Tow Keang Lim, Wen Ting Siow
Pneumonia in the tropics poses a heavy disease burden. The complex interplay of climate change, human migration influences and socio-economic factors lead to changing patterns of respiratory infections in tropical climate but also increasingly in temperate countries. Tropical and poorer countries, especially South East Asia, also bear the brunt of the global tuberculosis (TB) pandemic, accounting for almost one-third of the burden. But, as human migration patterns evolve, we expect to see more TB cases in higher income as well as temperate countries, and rise in infections like scrub typhus from ecotourism activities...
August 1, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28740137/deciphering-minimal-antigenic-epitopes-associated-with-burkholderia-pseudomallei-and-burkholderia-mallei-lipopolysaccharide-o-antigens
#17
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
#18
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
https://www.readbyqxmd.com/read/28728591/antimicrobial-susceptibility-pattern-of-clinical-isolates-of-burkholderia-pseudomallei-in-bangladesh
#19
Subarna Dutta, Sabah Haq, Mohammad Rokibul Hasan, Jalaluddin Ashraful Haq
BACKGROUND: Melioidosis an infectious disease, caused by a Gram negative bacterium called Burkholderia pseudomallei, is endemic in Bangladesh. This organism is sensitive to limited number of antimicrobial agents and need prolonged treatment. There is no comprehensive data on the antimicrobial susceptibility profile of B. pseudomallei isolated in Bangladesh over last several years. The present study aimed to determine the antimicrobial susceptibility pattern of B. pseudomallei isolated in a tertiary care hospital of Dhaka city from 2009 to 2015...
July 20, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28719324/susceptibility-of-clinical-isolates-of-burkholderia-pseudomallei-to-a-lipid-a-biosynthesis-inhibitor
#20
Sineenart Sengyee, Natnaree Saiprom, Suporn Paksanont, Direk Limmathurotsakul, Vanaporn Wuthiekanun, Narisara Chantratita
Burkholderia pseudomallei is the causative agent of melioidosis, a serious infection associated with high mortality and relapse. Current antimicrobial therapy using ceftazidime (CAZ) is often ineffective. Inhibitors of LpxC, the enzyme responsible for lipid A biosynthesis, have potential antimicrobial activity against several Gram-negative bacteria in vivo, but their activity against B. pseudomallei is unclear. Herein, we investigated the susceptibility of B. pseudomallei clinical isolates to LpxC-4, an LpxC inhibitor, and LpxC-4 in combination with CAZ...
July 2017: American Journal of Tropical Medicine and Hygiene
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