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https://www.readbyqxmd.com/read/28510994/improved-detection-of-burkholderia-pseudomallei-from-non-blood-clinical-specimens-using-enrichment-culture-and-pcr-narrowing-diagnostic-gap-in-resource-constrained-settings
#1
Chaitanya Tellapragada, Tushar Shaw, Annet D'Souza, Vandana Kalwaje Eshwara, Chiranjay Mukhopadhyay
OBJECTIVES: To evaluate the diagnostic utility of enrichment culture and PCR for improved case detection rates of non-bacteremic form of melioidosis in limited resource settings. METHODS: Clinical specimens (n=525) obtained from patients presenting at a tertiary care hospital of south India with clinical symptoms suggestive of community-acquired pneumonia, lower respiratory tract infections, superficial or internal abscesses, chronic skin ulcers and bone or joint infections were tested for the presence of Burkholderia pseudomallei using conventional culture (CC), enrichment culture (EC) and PCR...
May 16, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28507073/antibodies-against-in-vivo-expressed-antigens-are-sufficient-to-protect-against-lethal-aerosol-infection-with-burkholderia-mallei-and-burkholderia-pseudomallei
#2
Shawn M Zimmerman, Jeremy S Dyke, Tomislav P Jelesijevic, Frank Michel, Eric R Lafontaine, Robert J Hogan
Burkholderia mallei, a facultative intracellular bacterium and Tier 1 biothreat, causes the fatal zoonotic disease glanders. The organism possesses multiple genes encoding autotransporter proteins, which represent important virulence factors and targets for developing countermeasures in pathogenic Gram-negative bacteria. In the present study, we investigated one of these autotransporters, BatA, and demonstrate that it displays lipolytic activity, aids in intracellular survival, is expressed in vivo, elicits production of antibodies during infection, and contributes to pathogenicity in a mouse aerosol challenge model...
May 15, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28502643/are-brucellosis-q-fever-and-melioidosis-potential-causes-of-febrile-illness-in-madagascar
#3
Ides Boone, Klaus Henning, Angela Hilbert, Heinrich Neubauer, Vera von Kalckreuth, Denise Myriam Dekker, Norbert Georg Schwarz, Gi Deok Pak, Andreas Krüger, Ralf Matthias Hagen, Hagen Frickmann, Jean Noël Heriniaina, Raphael Rakotozandrindrainy, Jean Philibert Rakotondrainiarivelo, Tsiry Razafindrabe, Benedikt Hogan, Jürgen May, Florian Marks, Sven Poppert, Sascha Al Dahouk
Brucellosis, Q fever and melioidosis are zoonoses, which can lead to pyrexia. These diseases are often under-ascertained and underreported because of their unspecific clinical signs and symptoms, insufficient awareness by physicians and public health officers and limited diagnostic capabilities, especially in low-resource countries. Therefore, the presence of Brucella spp., Coxiella burnetii and Burkholderia pseudomallei was investigated in Malagasy patients exhibiting febrile illness. In addition, we analyzed zebu cattle and their ticks as potential reservoirs for Brucella and C...
May 11, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28493905/melioidosis-clinical-impact-and-public-health-threat-in-the-tropics
#4
REVIEW
Ramar Perumal Samy, Bradley G Stiles, Gautam Sethi, Lina H K Lim
This review briefly summarizes the geographical distribution and clinical impact of melioidosis, especially in the tropics. Burkholderia pseudomallei (a gram-negative bacterium) is the major causative agent for melioidosis, which is prevalent in Singapore, Malaysia, Thailand, Vietnam, and Northern Australia. Melioidosis patients are increasingly being recognized in other parts of the world. The bacteria are intrinsically resistant to many antimicrobial agents, but prolonged treatment, especially with combinations of antibiotics, may be effective...
May 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28481716/dna-vaccination-resurfaces-in-the-struggle-against-melioidosis
#5
Sophie A Aschenbroich
No abstract text is available yet for this article.
May 8, 2017: Virulence
https://www.readbyqxmd.com/read/28475641/a-nonsense-mutation-in-tlr5-is-associated-with-survival-and-reduced-il-10-and-tnf-%C3%AE-levels-in-human-melioidosis
#6
Panjaporn Chaichana, Narisara Chantratita, Florian Brod, Sirikamon Koosakulnirand, Kemajittra Jenjaroen, Suchintana Chumseng, Manutsanun Sumonwiriya, Mary N Burtnick, Paul J Brett, Prapit Teparrukkul, Direk Limmathurotsakul, Nicholas P J Day, Susanna J Dunachie, T Eoin West
BACKGROUND: Melioidosis, caused by the flagellated bacterium Burkholderia pseudomallei, is a life-threatening and increasingly recognized emerging disease. Toll-like receptor (TLR) 5 is a germline-encoded pattern recognition receptor to bacterial flagellin. We evaluated the association of a nonsense TLR5 genetic variant that truncates the receptor with clinical outcomes and with immune responses in melioidosis. METHODOLOGY/PRINCIPLE FINDINGS: We genotyped TLR5 c...
May 5, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28473933/melioidosis-with-portal-vein-thrombosis
#7
Thanyaporn Direksunthorn
Melioidosis, caused by Burkholderia pseudomallei, is a common infectious disease in tropical regions. The author reports a case of melioidosis with a rare manifestation of portal vein thrombosis and cavernous transformation of the portal vein. Melioidosis should be considered a differential diagnosis in patients with underlying risk factors who present with multiple liver abscesses; moreover, portal vein thrombosis can be a potential complication. Computed tomography is the modality of choice to demonstrate venous thrombosis in various organs...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28454708/functional-characterisation-of-burkholderia-pseudomallei-biotin-protein-ligase-a-toolkit-for-anti-melioidosis-drug-development
#8
Thomas E H Bond, Alanna E Sorenson, Patrick M Schaeffer
Burkholderia pseudomallei (Bp) is the causative agent of melioidosis. The bacterium is responsible for 20% of community-acquired sepsis cases and 40% of sepsis-related mortalities in northeast Thailand, and is intrinsically resistant to aminoglycosides, macrolides, rifamycins, cephalosporins, and nonureidopenicillins. There is no vaccine and its diagnosis is problematic. Biotin protein ligase (BirA) which is essential for fatty acid synthesis has been proposed as a drug target in bacteria. Very few bacterial BirA have been characterized, and a better understanding of these enzymes is necessary to further assess their value as drug targets...
June 2017: Microbiological Research
https://www.readbyqxmd.com/read/28453531/structural-diversity-of-burkholderia-pseudomallei-lipopolysaccharides-affects-innate-immune-signaling
#9
Michael H Norris, Herbert P Schweizer, Apichai Tuanyok
Burkholderia pseudomallei (Bp) causes the disease melioidosis. The main cause of mortality in this disease is septic shock triggered by the host responding to lipopolysaccharide (LPS) components of the Gram-negative outer membrane. Bp LPS is thought to be a weak inducer of the host immune system. LPS from several strains of Bp were purified and their ability to induce the inflammatory mediators TNF-α and iNOS in murine macrophages at low concentrations was investigated. Innate and adaptive immunity qPCR arrays were used to profile expression patterns of 84 gene targets in response to the different LPS types...
April 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28451778/central-nervous-system-melioidosis-in-the-pediatric-age-group-review
#10
REVIEW
G Lakshmi Prasad, Pushpa Kini, Divya S
PURPOSE: Melioidosis is a potentially fatal infectious disease caused by Burkholderia pseudomallei. Neurologic involvement in pediatric age group is very rare, and only a handful of cases have been reported in literature. We sought to provide a systematic review of pediatric neurologic melioidosis. METHODS: Literature review was performed to analyze reported cases of pediatric neurologic melioidosis (≤16 years) by searching online database (PubMed/MEDLINE). RESULTS: Twenty-seven cases were analyzed...
April 27, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28438936/demonstrating-the-protective-efficacy-of-the-novel-fluoroquinolone-finafloxacin-against-an-inhalational-exposure-to-burkholderia-pseudomallei
#11
Kay B Barnes, Karleigh A Hamblin, Mark I Richards, Thomas R Laws, Andreas Vente, Helen S Atkins, Sarah V Harding
Burkholderia pseudomallei is the causative agent of melioidosis, a serious disease endemic in South East Asia and Northern Australia. Antibiotic treatment is lengthy and relapse often occurs. Finafloxacin is a novel fluoroquinolone with increased antibacterial activity in acidic conditions in contrast to other fluoroquinolones which demonstrate reduced activity at lower pH. Therefore finafloxacin may have improved efficacy against B. pseudomallei, which can survive within host cells where the local pH is acidic...
April 24, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28435890/gene-expression-profile-of-human-cytokines-in-response-to-burkholderia-pseudomallei-infection
#12
Shivankari Krishnananthasivam, Harindra Darshana Sathkumara, Enoka Corea, Mohan Natesan, Aruna Dharshan De Silva
Melioidosis is an underreported infectious disease, caused by the Gram-negative bacterium Burkholderia pseudomallei. Understanding the disease susceptibility and pathogenesis is crucial for developing newer diagnostic and therapeutic strategies for this life-threatening infection. In this study, we aimed to analyze the gene expression levels of important cytokines in melioidosis patients and establish useful correlates with disease biomarkers compared to cases of sepsis infection caused by other pathogens and healthy individuals...
March 2017: MSphere
https://www.readbyqxmd.com/read/28422970/the-gut-microbiota-as-a-modulator-of-innate-immunity-during-melioidosis
#13
Jacqueline M Lankelma, Emma Birnie, Tassili A F Weehuizen, Brendon P Scicluna, Clara Belzer, Riekelt H Houtkooper, Joris J T H Roelofs, Alex F de Vos, Tom van der Poll, Andries E Budding, W Joost Wiersinga
BACKGROUND: Melioidosis, caused by the Gram-negative bacterium Burkholderia pseudomallei, is an emerging cause of pneumonia-derived sepsis in the tropics. The gut microbiota supports local mucosal immunity and is increasingly recognized as a protective mediator in host defenses against systemic infection. Here, we aimed to characterize the composition and function of the intestinal microbiota during experimental melioidosis. METHODOLOGY/PRINCIPAL FINDINGS: C57BL/6 mice were infected intranasally with B...
April 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28418830/increased-neurotropic-threat-from-burkholderia-pseudomallei-strains-with-a-b-mallei-like-variation-in-the-bima-motility-gene-australia
#14
Jodie L Morris, Anne Fane, Derek S Sarovich, Erin P Price, Catherine M Rush, Brenda L Govan, Elizabeth Parker, Mark Mayo, Bart J Currie, Natkunam Ketheesan
Neurologic melioidosis is a serious, potentially fatal form of Burkholderia pseudomallei infection. Recently, we reported that a subset of clinical isolates of B. pseudomallei from Australia have heightened virulence and potential for dissemination to the central nervous system. In this study, we demonstrate that this subset has a B. mallei-like sequence variation of the actin-based motility gene, bimA. Compared with B. pseudomallei isolates having typical bimA alleles, isolates that contain the B. mallei-like variation demonstrate increased persistence in phagocytic cells and increased virulence with rapid systemic dissemination and replication within multiple tissues, including the brain and spinal cord, in an experimental model...
May 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28417070/acute-bacteremic-pneumonia-due-to-melioidosis-developing-in-the-intensive-care-setting
#15
Huda Zainal Abidin, Alwi Muhd Besari, Chandran Nadarajan, Wan Fadzlina Wan Shukeri, Mohd Zulfakar Mazlan, Soon Eu Chong, Zeti Norfidiyati Salmuna Ayub
In Malaysia, melioidosis is commonly encountered as this infection is known as part of the endemic area for the disease. Managing cases of positive Burkholderia pseudomallei infection can involve multidisciplinary unit mainly, microbiologist, infectious disease team and intensive care as it may be quite difficult to distinguish melioidosis from a number of other diseases on the clinical setting alone. Laboratory diagnosis plays a vital role in determining the direction of management. Investigations such as culture, polymerase chain reaction (PCR) and serology should be evaluated once the disease is suspected...
2017: IDCases
https://www.readbyqxmd.com/read/28414823/comparing-in-vitro-and-in-vivo-virulence-phenotypes-of-burkholderia-pseudomallei-type-g-strains
#16
Eric R G Lewis, Paul B Kilgore, Tiffany M Mott, Gonzalo A Pradenas, Alfredo G Torres
Burkholderia pseudomallei (Bpm) is a saprophytic rod-shaped gram-negative bacterium and the causative agent of melioidosis. This disease has previously been described as endemic in areas such as northern Australia and Southeast Asia, but, more recently, a better understanding of the epidemiology of melioidosis indicated that the disease is distributed worldwide, including regions of the Americas and Africa. A 16S-23S rDNA internal transcribed spacer (ITS) typing system has been developed for Bpm and has revealed that ITS types C, E, and hybrid CE are mainly associated with Australia and Southeast Asia while type G strains are more associated with cases of melioidosis in the Western Hemisphere...
2017: PloS One
https://www.readbyqxmd.com/read/28414016/accidental-occupational-exposure-to-burkholderia-pseudomallei-in-south-korea-did-not-result-in-melioidosis
#17
Jae-Bum Jun, Taehoon Lee, Joseph Jeong, Jeong-Hoon Chun, Yong-Woo Shin, Jiwon Jung
No abstract text is available yet for this article.
April 17, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28400528/within-host-evolution-of-burkholderia-pseudomallei-during-chronic-infection-of-seven-australasian-cystic-fibrosis-patients
#18
Linda T Viberg, Derek S Sarovich, Timothy J Kidd, James B Geake, Scott C Bell, Bart J Currie, Erin P Price
Cystic fibrosis (CF) is a genetic disorder characterized by progressive lung function decline. CF patients are at an increased risk of respiratory infections, including those by the environmental bacterium Burkholderia pseudomallei, the causative agent of melioidosis. Here, we compared the genomes of B. pseudomallei isolates collected between ~4 and 55 months apart from seven chronically infected CF patients. Overall, the B. pseudomallei strains showed evolutionary patterns similar to those of other chronic infections, including emergence of antibiotic resistance, genome reduction, and deleterious mutations in genes involved in virulence, metabolism, environmental survival, and cell wall components...
April 11, 2017: MBio
https://www.readbyqxmd.com/read/28398677/preparing-for-biological-threats-addressing-the-needs-of-pregnant-women
#19
REVIEW
Amelia K Watson, Sascha Ellington, Christina Nelson, Tracee Treadwell, Denise J Jamieson, Dana M Meaney-Delman
Intentional release of infectious agents and biological weapons to cause illness and death has the potential to greatly impact pregnant women and their fetuses. We review what is known about the maternal and fetal effects of seven biological threats: Bacillus anthracis (anthrax); variola virus (smallpox); Clostridium botulinum toxin (botulism); Burkholderia mallei (glanders) and Burkholderia pseudomallei (melioidosis); Yersinia pestis (plague); Francisella tularensis (tularemia); and Rickettsia prowazekii (typhus)...
March 15, 2017: Birth Defects Res
https://www.readbyqxmd.com/read/28396541/antibiotic-resistance-markers-in-strain-bp1651-of-burkholderia-pseudomallei-identified-by-genome-sequence-analysis
#20
Julia V Bugrysheva, David Sue, Jay E Gee, Mindy G Elrod, Alex R Hoffmaster, Linnell B Randall, Sunisa Chirakul, Apichai Tuanyok, Herbert P Schweizer, Linda M Weigel
Burkholderia pseudomallei Bp1651 is resistant to several classes of antibiotics that are usually effective for treatment of melioidosis including β-lactams such as penicillins (amoxicillin/clavulanic acid), cephalosporins (ceftazidime), carbapenems (imipenem and meropenem), as well as tetracyclines and sulfonamides. We sequenced, assembled, and annotated the Bp1651 genome, and analyzed the sequence using comparative genomic analyses with susceptible strains, keyword searches of the annotation, publicly available antimicrobial resistance prediction tools, and published reports...
April 10, 2017: Antimicrobial Agents and Chemotherapy
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