245 results match your criteria: "Institute of Tropical Medicine Pedro Kouri[Affiliation]"

Central and Peripheral Nervous System Manifestations Associated with Dengue Illness.

Viruses

August 2024

Institute of Tropical Medicine "Pedro Kouri", WHO/PAHO Collaborating Center for the Study of Dengue and Its Control, Autopista Novia del Mediodia, km 6 1/2, La Lisa 17100, Cuba.

Dengue illness, caused by the dengue viruses, continues to be a major global health concern, with increasing incidence and the emergence of severe manifestations such as neurological complications. An overview of the current understanding of dengue epidemiology, clinical manifestations, and research priorities is presented here. Dengue transmission has escalated in recent years, exacerbated by factors such as vector expansion, climate change, and socioeconomic challenges.

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Background: Aedes aegypti, the primary vector of dengue, chikungunya, and Zika viruses, poses a significant public health threat worldwide. Traditional control methods using insecticides are increasingly challenged by resistance and environmental concerns. The sterile insect technique (SIT) offers an eco-friendly alternative that has been successfully applied to other insect pests.

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Syndemics theory has been applied to study interactions between biomedical and social factors leading to the clustering of diseases. Because syndemics theory focuses on interactions that enhance risk, the concept of vulnerability is central to this approach. We conducted a scoping review to better understand how this theoretical framework helped to define, operationalize, and tackle issues of vulnerability during the COVID-19 pandemic.

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Article Synopsis
  • The study investigates the potential of natural endoperoxides, like artemisinin and ascaridole, as effective treatments for leishmaniasis, a neglected tropical disease hindered by a lack of vaccines and drug resistance.
  • By reviewing over 110 research articles, the authors found that endoperoxides exploit the weak antioxidant defenses of Leishmania parasites, leading to oxidative stress and cell damage.
  • The findings suggest that these compounds could enhance the current anti-leishmanial drug options by creating imbalances in the parasites' biochemical functions, resulting in their death.
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Fungal microbiota in newborn infants with and without respiratory distress syndrome.

PLoS One

April 2024

Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública, Madrid, Spain.

Article Synopsis
  • Pneumocytis jirovecii infection has been linked to respiratory issues in preterm newborns, highlighting the need to study airway mycobiota in this population.
  • A study analyzed nasal samples from 26 preterm infants (with and without respiratory distress) and 13 term infants, revealing that 89.7% of newborns had the ascomycota phylum, with Cladosporium being the most common fungus.
  • The research is the first of its kind in this area, indicating potential links between fungal presence and prematurity, but emphasizes the need for further studies due to the small sample size.
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The mosquito-borne disease, Yellow fever (YF), has been largely controlled via mass delivery of an effective vaccine and mosquito control interventions. However, there are warning signs that YF is re-emerging in both Sub-Saharan Africa and South America. Imported from Africa in slave ships, YF was responsible for devastating outbreaks in the Caribbean.

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Eugenol-Rich Essential Oil from : In Vitro and In Vivo Potentialities against .

Pharmaceuticals (Basel)

December 2023

Research Network Natural Products against Neglected Diseases (ResNetNPND), 48149 Munster, Germany.

L. is one the most recognized species with diverse biological activities. In this study, in vitro activity and in vivo efficacy of essential oil from (EO-Pd) was evaluated.

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The ability of scorpion venom to modulate the concentration of cytokines related to its antitumoral effect is unknown. F3II cells were treated with ¼ IC, ½ IC and the IC of scorpion venom. Tumor growth kinetics in F3II-bearing mice were evaluated after 24 days of oral administration of venom doses.

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Mosquitoes are one of the main vectors of many important diseases and their degree of resistance to chemical insecticides has increased. Nowadays, it has become crucial to identify novel plant larvicides with an eco-friendly impact. The components of essential oils from Jacq.

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Article Synopsis
  • In 2020, the WHO launched a road map targeting the control and eradication of 20 neglected tropical diseases, focusing on conditions like leishmaniasis and Chagas disease.
  • The WHO has also been working on a Global Action Plan to combat Antimicrobial Resistance since 2015, highlighting the need for innovative treatment strategies in poor regions.
  • Natural peptide molecules (AMPs and CPPs) are emerging as promising alternatives to traditional therapies, as they show potential to enhance treatment effectiveness and reduce issues of toxicity and resistance in managing neglected zoonoses.
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A Possible Case of Centronuclear Myopathy: A Case Report.

Medicina (Kaunas)

June 2023

Department of Experimental Medicine, Division of Molecular Biology, Biotechnology and Histology, University of Campania, 80138 Naples, Italy.

Congenital myopathies (CMs) are a group of diseases that primarily affect the muscle fiber, especially the contractile apparatus and the different components that condition its normal functioning. They present as muscle weakness and hypotonia at birth or during the first year of life. Centronuclear CM is characterized by a high incidence of nuclei located centrally and internally in muscle fibers.

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COVID-19 has affected all aspects of human life so far. From the outset of the pandemic, preventing the spread of COVID-19 through the observance of health protocols, especially the use of sanitizers and disinfectants was given more attention. Despite the effectiveness of disinfection chemicals in controlling and preventing COVID-19, there are critical concerns about their adverse effects on human health.

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Yellow fever and chikungunya outbreaks-and a few dengue cases-have been reported in the Democratic Republic of the Congo (DRC) in recent years. However, little is known about the ecology and behavior of the adult disease vector species, and , in DRC. Preliminary studies showed important differences in behavior in DRC and Latin-American sites.

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First report of natural Wolbachia infections in mosquitoes from Cuba.

Acta Trop

June 2023

Department of Vector Control, Center for Research, Diagnostic, and Reference, Institute of Tropical Medicine Pedro Kourí, PAHO-WHO Collaborating Center for Dengue and its Control, Autopista Novia del Mediodía km 6 ½, La Lisa 11 400, Havana, Havana, Cuba.

Mosquitoes are extensively responsible for the transmission of pathogens. Novel strategies using Wolbachia could transform that scenario, since these bacteria manipulate mosquito reproduction, and can confer a pathogen transmission-blocking phenotype in culicids. Here, we screened the Wolbachia surface protein region by PCR in eight Cuban mosquito species.

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Mollusks have been widely investigated for antimicrobial peptides because their humoral defense against pathogens is mainly based on these small biomolecules. In this report, we describe the identification of three novel antimicrobial peptides from the marine mollusk . A pool of peptides was analyzed with nanoLC-ESI-MS-MS technology, and three potential antimicrobial peptides (Nv-p1, Nv-p2 and Nv-p3) were identified with bioinformatical predictions and selected for chemical synthesis and evaluation of their biological activity.

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Introduction: Infection with hepatitis delta virus (HDV) is one of the most severe hepatitis B virus (HBV) complications, with a more rapid progression to cirrhosis and an increased risk of hepatic decompensation and death. Data on HDV infection in Cuba are limited. The aims of our study were to determine the HDV prevalence in HBsAg carriers and to characterize the HDV strains circulating.

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Early diagnostic indicators of dengue versus other febrile illnesses in Asia and Latin America (IDAMS study): a multicentre, prospective, observational study.

Lancet Glob Health

March 2023

Section Clinical Tropical Medicine, Department of Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany; Heidelberg Institute of Global Health, Heidelberg University Hospital, Heidelberg, Germany; Center for Global Health, Colorado School of Public Health, Aurora, CO, USA; Paediatric Infectious Diseases, Colorado School of Medicine, Aurora, CO, USA. Electronic address:

Background: Improvements in the early diagnosis of dengue are urgently needed, especially in resource-limited settings where the distinction between dengue and other febrile illnesses is crucial for patient management.

Methods: In this prospective, observational study (IDAMS), we included patients aged 5 years and older with undifferentiated fever at presentation from 26 outpatient facilities in eight countries (Bangladesh, Brazil, Cambodia, El Salvador, Indonesia, Malaysia, Venezuela, and Viet Nam). We used multivariable logistic regression to investigate the association between clinical symptoms and laboratory tests with dengue versus other febrile illnesses between day 2 and day 5 after onset of fever (ie, illness days).

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Aedes albopictus (Skuse, 1894) is one of the major vectors for arboviruses such as dengue, Zika, and chikungunya. Originally from Southeast Asia, this species has spread to Africa, Europe, and the Americas, including Cuba. This spread has been favored by its great adaptability to variable temperatures and to the resistance of its eggs to desiccation.

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Aedes albopictus (Skuse) dispersion in Havana City, Cuba, 1995-2018.

Acta Trop

April 2023

Emerging Infectious Diseases Unit, Department of Public Health, Institute of Tropical Medicine, Antwerp, Belgium. Electronic address:

Various arboviruses are transmitted to humans by mosquitoes, particularly Aedes aegypti and Aedes albopictus, two invasive and frequently sympatric species. The objective of this study was to evaluate the dispersion and the behavior of Ae. albopictus in relation to houses and its association with other mosquitoes in the province of Havana, Cuba.

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Article Synopsis
  • The study evaluated the efficiency of analyzing two versus three stool samples for detecting intestinal parasitic infections (IPIs) in children from Cuba, focusing on resource and time savings.
  • Three stool samples were collected and analyzed using various microscopy techniques, revealing that while the wet mount was the most effective method overall, the Willis flotation method helped in identifying some helminth eggs.
  • Results showed that for most protozoan parasites, analyzing two samples provided sufficient data for prevalence estimation, suggesting that additional sample analysis yields little extra value while increasing workload.
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