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Buruli Ulcer

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https://www.readbyqxmd.com/read/28500810/environmental-and-behavioral-drivers-of-buruli-ulcer-disease-in-selected-communities-along-the-densu-river-basin-of-ghana-a-case-control-study
#1
Samuel Yaw Aboagye, Prince Asare, Isaac Darko Otchere, Eric Koka, George Ekow Mensah, Dzidzo Yirenya-Tawiah, Dorothy Yeboah-Manu
AbstractThe exact route of transmission of Mycobacterium ulcerans (MU) (causative agent of Buruli ulcer [BU]), risk factors, and reservoir hosts are not clearly known, although it has been identified as an environmental pathogen. This study assessed potential environmental and behavioral risk factors that influence BU infections. We conducted a case-control study where cases were matched by their demographic characteristics and place of residence. A structured questionnaire was administered to solicit information on the environmental and behavioral factors of participants that may expose them to infection...
May 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28487559/global-and-local-environmental-changes-as-drivers-of-buruli-ulcer-emergence
#2
Marine Combe, Camilla Jensen Velvin, Aaron Morris, Andres Garchitorena, Kevin Carolan, Daniel Sanhueza, Benjamin Roche, Pierre Couppié, Jean-François Guégan, Rodolphe Elie Gozlan
No abstract text is available yet for this article.
May 10, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28481900/yaws-resurgence-in-bankim-cameroon-the-relative-effectiveness-of-different-means-of-detection-in-rural-communities
#3
Alphonse Um Boock, Paschal Kum Awah, Ferdinand Mou, Mark Nichter
BACKGROUND: Yaws is an infectious, debilitating and disfiguring disease of poverty that mainly affects children in rural communities in tropical areas. In Cameroon, mass-treatment campaigns carried out in the 1950s reduced yaws to such low levels that it was presumed the disease was eradicated. In 2010, an epidemiological study in Bankim Health District detected 29 cases of yaws. Five different means of detecting yaws in clinical and community settings were initiated in Bankim over the following five years...
May 8, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28450515/draft-genome-sequence-of-mycobacterium-ulcerans-s4018-isolated-from-a-patient-with-an-active-buruli-ulcer-in-benin-africa
#4
Stanimir Kambarev, Stéphane Corvec, Annick Chauty, Estelle Marion, Laurent Marsollier, Frédéric Pecorari
Currently, there are only two publicly available genomes of Mycobacterium ulcerans-the causative agent of the neglected, but devastating, tropical disease Buruli ulcer. Here, we report the draft genome sequence of isolate S4018, recovered from an active cutaneous lesion of a patient with Buruli ulcer in Benin, Africa.
April 27, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28442755/global-and-local-environmental-changes-as-drivers-of-buruli-ulcer-emergence
#5
REVIEW
Marine Combe, Camilla Jensen Velvin, Aaron Morris, Andres Garchitorena, Kevin Carolan, Daniel Sanhueza, Benjamin Roche, Pierre Couppié, Jean-François Guégan, Rodolphe Elie Gozlan
Many emerging infectious diseases are caused by generalist pathogens that infect and transmit via multiple host species with multiple dissemination routes, thus confounding the understanding of pathogen transmission pathways from wildlife reservoirs to humans. The emergence of these pathogens in human populations has frequently been associated with global changes, such as socio-economic, climate or biodiversity modifications, by allowing generalist pathogens to invade and persist in new ecological niches, infect new host species, and thus change the nature of transmission pathways...
April 26, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28442219/virulence-potential-of-staphylococcus-aureus-isolates-from-buruli-ulcer-patients
#6
Nana Ama Amissah, Monika A Chlebowicz, Anthony Ablordey, Caitlin S Tetteh, Isaac Prah, Tjip S van der Werf, Alex W Friedrich, Jan Maarten van Dijl, Ymkje Stienstra, John W Rossen
Buruli ulcer (BU) is a necrotizing infection of the skin and subcutaneous tissue caused by Mycobacterium ulcerans. BU wounds may also be colonized with other microorganisms including Staphylococcus aureus. This study aimed to characterize the virulence factors of S. aureus isolated from BU patients. Previously sequenced genomes of 21 S. aureus isolates from BU patients were screened for the presence of virulence genes. The results show that all S. aureus isolates harbored on their core genomes genes for known virulence factors like α-hemolysin, and the α- and β-phenol soluble modulins...
April 19, 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/28438917/disease-ecology-health-and-the-environment-a-framework-to-account-for-ecological-and-socio-economic-drivers-in-the-control-of-neglected-tropical-diseases
#7
A Garchitorena, S H Sokolow, B Roche, C N Ngonghala, M Jocque, A Lund, M Barry, E A Mordecai, G C Daily, J H Jones, J R Andrews, E Bendavid, S P Luby, A D LaBeaud, K Seetah, J F Guégan, M H Bonds, G A De Leo
Reducing the burden of neglected tropical diseases (NTDs) is one of the key strategic targets advanced by the Sustainable Development Goals. Despite the unprecedented effort deployed for NTD elimination in the past decade, their control, mainly through drug administration, remains particularly challenging: persistent poverty and repeated exposure to pathogens embedded in the environment limit the efficacy of strategies focused exclusively on human treatment or medical care. Here, we present a simple modelling framework to illustrate the relative role of ecological and socio-economic drivers of environmentally transmitted parasites and pathogens...
June 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28437439/landscape-and-environmental-influences-on-mycobacterium-ulcerans-distribution-among-aquatic-sites-in-ghana
#8
Shannon M Pileggi, Heather Jordan, Julie A Clennon, Ellen Whitney, M Eric Benbow, Richard Merritt, Mollie McIntosh, Ryan Kimbirauskas, Pamela Small, Daniel Boakye, Charles Quaye, Jiaguo Qi, Lindsay Campbell, Jenni Gronseth, Edwin Ampadu, William Opare, Lance A Waller
Buruli ulcer, caused by Mycobacterium ulcerans, is highly endemic in West Africa. While the mode of transmission is unknown, many studies associate Buruli ulcer with different types of water exposure. We present results from the largest study to date to test for M. ulcerans in aquatic sites and identify environmental attributes associated with its presence. Environmental samples from 98 aquatic sites in the Greater Accra, Ashanti, and Volta regions of Ghana were tested for the presence of M. ulcerans DNA by polymerase chain reaction...
2017: PloS One
https://www.readbyqxmd.com/read/28418294/exposure-risk-for-infection-and-lack-of-human-to-human-transmission-of-mycobacterium-ulcerans-disease-australia
#9
Daniel P O'Brien, James W Wynne, Andrew H Buultjens, Wojtek P Michalski, Timothy P Stinear, N Deborah Friedman, Andrew Hughes, Eugene Athan
We conducted epidemiologic and genetic analyses of family clusters of Mycobacterium ulcerans (Buruli ulcer) disease in southeastern Australia. We found that the incidence of M. ulcerans disease in family members was increased. However, the risk for exposure appeared short-term and not related to human-human transmission.
May 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28410412/mycobacterium-ulcerans-low-infectious-dose-and-mechanical-transmission-support-insect-bites-and-puncturing-injuries-in-the-spread-of-buruli-ulcer
#10
John R Wallace, Kirstie M Mangas, Jessica L Porter, Renee Marcsisin, Sacha J Pidot, Brian Howden, Till F Omansen, Weiguang Zeng, Jason K Axford, Paul D R Johnson, Timothy P Stinear
Addressing the transmission enigma of the neglected disease Buruli ulcer (BU) is a World Health Organization priority. In Australia, we have observed an association between mosquitoes harboring the causative agent, Mycobacterium ulcerans, and BU. Here we tested a contaminated skin model of BU transmission by dipping the tails from healthy mice in cultures of the causative agent, Mycobacterium ulcerans. Tails were exposed to mosquito (Aedes notoscriptus and Aedes aegypti) blood feeding or punctured with sterile needles...
April 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28392809/in-vitro-susceptibility-of-mycobacterium-ulcerans-isolates-to-selected-antimicrobials
#11
Enid Owusu, Mercy J Newman, Kwesi K Addo, Phyllis Addo
Background. The current definitive treatment of Buruli ulcer with antibiotics makes the issue of antimicrobial drug resistance an unavoidable one. This is as a result of drug misuse by health personnel and patients' noncompliance to treatment regimen. Monitoring of these factors and screening for new effective antimicrobials are crucial to effective management of Buruli ulcer disease. This study therefore investigated the inhibitory activity of some antibiotics against isolates of Mycobacterium ulcerans. Methods...
2017: Canadian Journal of Infectious Diseases & Medical Microbiology
https://www.readbyqxmd.com/read/28392785/an-optimized-method-for-extracting-bacterial-rna-from-mouse-skin-tissue-colonized-by-mycobacterium-ulcerans
#12
Marie Robbe-Saule, Jérémie Babonneau, Odile Sismeiro, Laurent Marsollier, Estelle Marion
Bacterial transcriptome analyses during host colonization are essential to decipher the complexity of the relationship between the bacterium and its host. RNA sequencing (RNA-seq) is a promising approach providing valuable information about bacterial adaptation, the host response and, in some cases, mutual tolerance underlying crosstalk, as recently observed in the context of Mycobacterium ulcerans infection. Buruli ulcer is caused by M. ulcerans. This neglected disease is the third most common mycobacterial disease worldwide...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28344056/chronic-cutaneous-mycobacterial-ulcers-due-to-mycobacterium-ulcerans-buruli-ulcer-the-first-indigenous-case-report-from-jordan-and-a-literature-review
#13
Jamal Wadi Al Ramahi, Hassan Annab, Mutaz Al Karmi, Basel Kirresh, Mahmoud Wreikat, Rami Batarseh, Muhannad Yacoub, Mais Kaderi
BACKGROUND: Buruli ulcer is the third most common mycobacterial infection worldwide. It is endemic in tropical, subtropical, and temperate climates. It causes devastating disease with morbidity and mortality. The treatment duration is long and the regimens considered are limited. Chronic cutaneous ulcers of mycobacterial etiology have been reported previously in Amman, but these were not associated with Mycobacterium ulcerans infection. METHODS: The case patient's initial diagnosis was based on chronological and morphological features, combined with appropriate diagnostic tests...
May 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28329001/experimental-demonstration-of-the-possible-role-of-acanthamoeba-polyphaga-in-the-infection-and-disease-progression-in-buruli-ulcer-bu-using-icr-mice
#14
Bright K Azumah, Phyllis G Addo, Alfred Dodoo, Gordon Awandare, Lydia Mosi, Daniel A Boakye, Michael D Wilson
The transmission of Buruli ulcer (BU), caused by Mycobacterium ulcerans (MU), remains puzzling although a number of hypothesis including through bites of infected aquatic insects have been proposed. We report the results of experiments using ICR mice that give credence to our hypothesis that Acanthamoeba species may play a role in BU transmission. We cocultured MU N2 and MU 1615 which expresses red fluorescent protein (RFP) and Acanthamoeba polyphaga (AP), and confirmed infected AP by Ziehl-Neelsen (ZN) staining...
2017: PloS One
https://www.readbyqxmd.com/read/28315039/ecology-and-feeding-habits-drive-infection-of-water-bugs-with-mycobacterium-ulcerans
#15
Solange Meyin A Ebong, Gabriel E García-Peña, Dominique Pluot-Sigwalt, Laurent Marsollier, Philippe Le Gall, Sara Eyangoh, Jean-François Guégan
Mycobacterium ulcerans (MU), the causative agent of Buruli ulcer, is present in a wide spectrum of environments, including terrestrial and aquatic ecosystems in tropical regions. The most promising studies on the epidemiological risk of this disease suggest that some ecological settings may favor infection of animals with MU including human. A species' needs and impacts on resources and the environment, i.e., its ecological niche, may influence its susceptibility to be infected by this microbial form. For example, some Naucoridae may dive in fresh waters to prey upon infected animals and thus may get infected with MU...
March 17, 2017: EcoHealth
https://www.readbyqxmd.com/read/28294596/the-macrolide-toxin-mycolactone-promotes-bim-dependent-apoptosis-in-buruli-ulcer-through-inhibition-of-mtor
#16
Raphael Bieri, Nicole Scherr, Marie-Thérèse Ruf, Jean-Pierre Dangy, Philipp Gersbach, Matthias Gehringer, Karl-Heinz Altmann, Gerd Pluschke
Mycolactone, the macrolide exotoxin produced by Mycobacterium ulcerans, is central to the pathogenesis of the chronic necrotizing skin disease Buruli ulcer (BU). Here we show that mycolactone acts as an inhibitor of the mechanistic Target of Rapamycin (mTOR) signaling pathway by interfering with the assembly of the two distinct mTOR protein complexes mTORC1 and mTORC2, which regulate different cellular processes. Inhibition of the assembly of the rictor containing mTORC2 complex by mycolactone prevents phosphorylation of the serine/threonine protein kinase Akt...
March 27, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28265515/genomic-analysis-of-st88-community-acquired-methicillin-resistant-staphylococcus-aureus-in-ghana
#17
Grace Kpeli, Andrew H Buultjens, Stefano Giulieri, Evelyn Owusu-Mireku, Samuel Y Aboagye, Sarah L Baines, Torsten Seemann, Dieter Bulach, Anders Gonçalves da Silva, Ian R Monk, Benjamin P Howden, Gerd Pluschke, Dorothy Yeboah-Manu, Timothy Stinear
BACKGROUND: The emergence and evolution of community-acquired methicillin resistant Staphylococcus aureus (CA-MRSA) strains in Africa is poorly understood. However, one particular MRSA lineage called ST88, appears to be rapidly establishing itself as an "African" CA-MRSA clone. In this study, we employed whole genome sequencing to provide more information on the genetic background of ST88 CA-MRSA isolates from Ghana and to describe in detail ST88 CA-MRSA isolates in comparison with other MRSA lineages worldwide...
2017: PeerJ
https://www.readbyqxmd.com/read/28245242/assessing-and-managing-wounds-of-buruli-ulcer-patients-at-the-primary-and-secondary-health-care-levels-in-ghana
#18
Naa Okaikor Addison, Stefanie Pfau, Eric Koka, Samuel Yaw Aboagye, Grace Kpeli, Gerd Pluschke, Dorothy Yeboah-Manu, Thomas Junghanss
BACKGROUND: Beyond Mycobacterium ulcerans-specific therapy, sound general wound management is required for successful management of Buruli ulcer (BU) patients which places them among the large and diverse group of patients in poor countries with a broken skin barrier. METHODS: Clinically BU suspicious patients were enrolled between October 2013 and August 2015 at a primary health care (PHC) center and a municipal hospital, secondary health care (SHC) center in Ghana...
February 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28242097/cutaneous-basidiobolomycosis-seven-cases-in-southern-benin
#19
F Atadokpédé, J Gnossikè, H Adégbidi, B Dégboé, Y Sissinto-Savi de Tovè, A Adéyé, C Koudoukpo, A Chauty, D Chabasse, J-P Saint-André, M-T Dieng, M-C Koeppel, H-G Yedomon, F do-Ango-Padonou
BACKGROUND: Cutaneous basidiobolomycosis is the most common form of entomophthoramycosis. Herein we report seven cases of cutaneous basidiobolomycosis. PATIENTS AND METHODS: A retrospective observational study was conducted at the Buruli ulcer treatment centre in Pobè and at the national teaching hospital in Cotonou from 2010 to 2015. RESULTS: Seven cases of cutaneous basidiobolomycosis were diagnosed. The mean patient age was 9.53 years...
February 24, 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/28241036/analysis-of-mycobacterium-ulcerans-specific-t-cell-cytokines-for-diagnosis-of-buruli-ulcer-disease-and-as-potential-indicator-for-disease-progression
#20
Norman Nausch, Daniel Antwi-Berko, Yusif Mubarik, Kabiru Mohammed Abass, Wellington Owusu, Ellis Owusu-Dabo, Linda Batsa Debrah, Alexander Yaw Debrah, Marc Jacobsen, Richard O Phillips
BACKGROUND: Buruli ulcer disease (BUD), caused by Mycobacterium (M.) ulcerans, is the third most common mycobacterial disease after tuberculosis and leprosy. BUD causes necrotic skin lesions and is a significant problem for health care in the affected countries. As for other mycobacterial infections, T cell mediated immune responses are important for protection and recovery during treatment, but detailed studies investigating these immune responses in BUD patients are scarce. In this study, we aimed to characterise M...
February 2017: PLoS Neglected Tropical Diseases
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