GHTM

Global Health and Tropical Medicine

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Home / Archives for Machado D

Thermal and magnetic properties of chitosan-iron oxide nanoparticles

  • Authors: Borges P, Coutinho JT, Ferreira IMM, Laia C, Machado D, Novo C, Pereira LCJ, Soares PIP
  • Publication Year: 2016
  • Journal: Carbohydrate Polymers
  • Link: https://www.sciencedirect.com/science/article/pii/S0144861716305008

Chitosan is a biopolymer widely used for biomedical applications such as drug delivery systems, wound healing, and tissue engineering. Chitosan can be used as coating for other types of materials such as iron oxide nanoparticles, improving its biocompatibility while extending its range of applications. In this work iron oxide nanoparticles (Fe3O4 NPs) produced by chemical […]
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Beyond extensively drug-resistant tuberculosis in Lisbon, Portugal: a case of linezolid resistance acquisition presenting as an iliopsoas abscess

  • Authors: Couto I, Machado D, Maltez F, Perdigão J, Pereira C, Portugal I, Silva C, Silva H, Viveiros M
  • Publication Year: 2016
  • Journal: International Journal of Antimicrobial Agents
  • Link: https://www.sciencedirect.com/science/article/pii/S0924857916302692?via%3Dihub

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An Experimental Model for the Rapid Screening of Compounds with Potential Use Against Mycobacteria

  • Authors: Azzali E, Coelho T, Costa SS, Couto I, da Silva PEA, Lopes E, Machado D, Pieroni M, Viveiros M
  • Publication Year: 2016
  • Journal: ASSAY and Drug Development Technologies
  • Link: https://www.liebertpub.com/doi/pdf/10.1089/adt.2016.752

Infections caused by Mycobacterium tuberculosis and other mycobacteria are major challenges for global public health. Particularly worrisome are infections caused by multidrug-resistant bacteria, which are increasingly difficult to treat because of the loss of efficacy of the current antibacterial agents, a problem that continues to escalate worldwide. There has been a limited interest and investment […]
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The variability and reproducibility of whole genome sequencing technology for detecting resistance to anti-tuberculous drugs

  • Authors: Campino S, Clark TG, Dheda K, Huggett JF, Machado D, McNerney R, O'Grady J, O'Sullivan DM, Phelan J, Ramos J, Viveiros M, Whale AS
  • Publication Year: 2016
  • Journal: Genome Medicine
  • Link: https://genomemedicine.biomedcentral.com/articles/10.1186/s13073-016-0385-x

The emergence of resistance to anti-tuberculosis drugs is a serious and growing threat to public health. Next-generation sequencing is rapidly gaining traction as a diagnostic tool for investigating drug resistance in Mycobacterium tuberculosis to aid treatment decisions. However, there are few little data regarding the precision of such sequencing for assigning resistance profiles.
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Contribution of efflux to the emergence of isoniazid and multidrug resistance in Mycobacterium tuberculosis.

  • Authors: Amaral L, Baptista P, Couto I, Machado D, Perdigão J, Portugal I, Rodrigues L, Veigas B, Viveiros M
  • Journal: PLoS One
  • Link: http://www.ncbi.nlm.nih.gov/pubmed/?term=Contribution+of+Efflux+to+the+Emergence+of+Isoniazid+and+Multidrug+Resistance+in+Mycobacterium+tuberculosis

Multidrug resistant (MDR) tuberculosis is caused by Mycobacterium tuberculosis resistant to isoniazid and rifampicin, the two most effective drugs used in tuberculosis therapy. Here, we investigated the mechanism by which resistance towards isoniazid develops and how overexpression of efflux pumps favors accumulation of mutations in isoniazid targets, thus establishing a MDR phenotype.
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About GHTM

GHTM is a R&D Unit that brings together researchers with a track record in Tropical Medicine and International & Global Health. It aims at strengthening Portugal's role as a leading partner in the development and implementation of a global health research agenda. Our evidence-based interventions contribute to the promotion of equity in health and to improve the health of populations.

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Funding

UID/04413/2025 - DOI: 10.54499/UID/04413/2025

UID/PRR/04413/2025 - DOI: 10.54499/UID/PRR/04413/2025

UID/PRR2/04413/2025 - DOI: 10.54499/UID/PRR2/04413/2025

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