909 results match your criteria: "Institute of Infectious Diseases and Molecular Medicine[Affiliation]"

Objectives: This study aimed to investigate genotypic characteristics and drug resistance profiles of complex (Mtbc) strains isolated from patients with suspected tuberculosis (TB) in Gabon.

Methods: We performed whole genome sequencing of 430 Mtbc strains cultured between 2012 and 2022. Phylogenetic strain classification, genomic resistance prediction, and cluster analysis were also performed.

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Objectives: This wound section of the PREvalence Study on Surgical COnditions (PRESSCO) determines the incidence and prevalence of wounds and burns in Sierra Leone. It further describes access to wound care and wound-related healthcare-seeking behaviour.

Methods: Between October 2019 and March 2020, a nationwide cross-sectional household survey was performed.

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Kisspeptin (KISS1) and its cognate receptor (KISS1R) are implicated in the progression of various cancers. A gallium-68 labelled kisspeptin-10 (KP10), the minimal biologically active structure, has potential as a pan-tumour radiopharmaceutical for the detection of cancers. Furthermore, a lutetium-177 labelled KP10 could find therapeutic application in treating oncological diseases.

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AIDS-related mycoses: advances, challenges, and future directions.

Trends Microbiol

January 2025

CMM AFRICA Medical Mycology Research Unit, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Cape Town, South Africa; Medical Research Centre for Medical Mycology, University of Exeter, Exeter, Department of Biosciences, Faculty of Health and Life Sciences, Exeter, UK.

Fungal infections are a major contributor to mortality for people with HIV/AIDS. Recently, researchers, clinicians, industry experts, and policymakers convened for the triennial AIDS-Related Mycoses Meeting to address critical gaps in the management of AIDS-related mycoses. Delegates highlighted several scientifically driven milestones that have significantly reduced fungal-related deaths, and the need to address outstanding challenges in diagnosis, treatment, and research.

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Behavioural and social drivers of human papillomavirus vaccination in eThekwini District of KwaZulu-Natal Province, South Africa.

PLoS One

December 2024

Faculty of Health Sciences, Department of Medicine & CIDRI-Africa, Institute of Infectious Diseases and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa.

Background: Cervical cancer is the second most common cancer in women in South Africa. Infection with high-risk types of human papillomavirus (HPV) is the cause of cervical cancer, which can be prevented by HPV vaccination. However, there is wide variation in HPV vaccination coverage among the urban districts of South Africa; with the lowest coverage being 40% in eThekwini, KwaZulu-Natal.

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Previous studies have shown that the majority of long-lived cells harboring persistent HIV-1 proviral genomes originates from viruses circulating in the year prior to antiretroviral therapy (ART) initiation, but a smaller proportion originates from viruses circulating much earlier in untreated infection. These observations suggest that discrete biological factors influence the entry and persistence of viruses into the persistent proviral pool, and there may be periods earlier in untreated infection with increased seeding. Therefore, we examined the timing of formation of the long-lived pool of infected cells that persists during ART in seven women (after a median of 5.

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Emergence of Omicron FN.1 a descendent of BQ.1.1 in Botswana.

Virus Evol

November 2024

Research Laboratory, Botswana Harvard Health Partnership, Gaborone, Private Bag BO 320, Botswana.

Botswana, like the rest of the world, has been significantly impacted by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). In December 2022, we detected a monophyletic cluster of genomes comprising a sublineage of the Omicron variant of concern (VOC) designated as B.1.

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Now that it has been realized that viruses are ubiquitous, questions have been raised on factors influencing their diversity and distribution. For phytoviruses, understanding the interplay between plant diversity and virus species richness and prevalence remains cardinal. As both the amplification and the dilution of viral species richness due to increasing host diversity have been theorized and observed, a deeper understanding of how plants and viruses interact in natural environments is needed to explore how host availability conditions viral diversity and distributions.

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Novel lineage of anelloviruses with large genomes identified in dolphins.

J Virol

December 2024

The Biodesign Center for Fundamental and Applied Microbiomics, Center for Evolution and Medicine, School of Life Sciences, Arizona State University, Tempe, Arizona, USA.

Unlabelled: Anellovirus infections are ubiquitous in mammals but lack any clear disease association, suggesting a commensal virus-host relationship. Although anelloviruses have been identified in numerous mammalian hosts, their presence in members of the family Delphinidae has yet to be reported. Here, using a metagenomic approach, we characterize complete anellovirus genomes ( = 69) from four Delphinidae host species: short-finned pilot whale (, = 19), killer whale (, = 9), false killer whale (, = 6), and pantropical spotted dolphin (, = 1).

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Purpose Of Review: Women in Africa bear the burden of the HIV epidemic, which has been associated with the high prevalence of bacterial vaginosis (BV) in the region. However, little progress has been made in finding an effective cure for BV. Drawing on advances in microbiome-directed therapies for gastrointestinal disorders, similar live-biotherapeutic based approaches for BV treatment are being evaluated.

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Article Synopsis
  • In sub-Saharan Africa, girls aged 15-19 represent 86% of HIV infections, underscoring the need to understand risk factors affecting them compared to adult women in South Africa.
  • A study of 305 adolescent girls and 114 adult women in two South African provinces revealed that while adults reported higher risk sexual behaviors, adolescents had a higher prevalence of STIs (62.8% vs 34.0% in the Western Cape).
  • Factors like earlier sexual debut and the use of intravaginal sexual enhancers among adolescents were significant, and behavioral risk factors such as the number of sexual partners and recent sexual activity were linked to STI presence in both age groups.
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Yellow fever breakthrough infections after yellow fever vaccination: a systematic review and meta-analysis.

Lancet Microbe

December 2024

Amsterdam UMC, Location University of Amsterdam, Center for Tropical Medicine and Travel Medicine, Department of Infectious Diseases, Amsterdam Public Health - Global Health, and Amsterdam Institute for Immunology and Infectious Diseases, Amsterdam, Netherlands. Electronic address:

Article Synopsis
  • This systematic review and meta-analysis investigated symptomatic yellow fever breakthrough infections in vaccinated individuals, focusing on cases occurring less than and more than ten years after vaccination.
  • The research reviewed 1975 records, ultimately identifying 37 relevant studies that documented 6951 yellow fever cases, with 537 involving vaccinated patients, primarily from Brazil.
  • A total of 33 confirmed or probable breakthrough cases were found, with two patients severely ill and resulting in death, highlighting a need for ongoing surveillance in vaccinated populations.
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Chronic Hepatitis B Virus (HBV) infection remains a significant public health concern, particularly in Africa, where the burden is substantial. HBV is an enveloped virus, classified into ten phylogenetically distinct genotypes (A-J). Tests to determine HBV genotypes are based on full-genome sequencing or reverse hybridization.

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The divergent outcome of IL-4Rα signalling on Foxp3 T regulatory cells in listeriosis and tuberculosis.

Front Immunol

November 2024

Division of Immunology, Institute of Infectious Diseases and Molecular Medicine (IDM), Department of Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.

Introduction: Forkhead box P3 (Foxp3) T regulatory cells are critical for maintaining self-tolerance, immune homeostasis, and regulating the immune system.

Methods: We investigated interleukin-4 receptor alpha (IL-4Rα) signalling on T regulatory cells (Tregs) during () infection using a mouse model on a BALB/c background, specifically with IL-4Rα knockdown in Tregs (Foxp3IL-4Rα).

Results: We showed an impairment of Treg responses, along with a decreased bacterial burden and diminished tissue pathology in the liver and spleen, which translated into better survival.

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Establishing suitable in vitro culture conditions for microorganisms is crucial for dissecting their biology and empowering potential applications. However, a significant number of bacterial and fungal species, including Pneumocystis jirovecii, remain unculturable, hampering research efforts. P.

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Article Synopsis
  • - New vaccines are needed to effectively combat the world's deadliest pathogen because the current BCG vaccine has limitations in efficacy.
  • - The study investigates HLA-E-restricted T cells in non-human primates and humans, finding that BCG vaccination does not significantly increase these T cells' frequency.
  • - Results indicate that HLA-E-restricted T cells are minimally boosted by BCG but can emerge after infection in unvaccinated primates, suggesting HLA-E could be a potential target for new TB vaccines.
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Introduction: The uptake trend of a new vaccine is unpredictable and may reflect the quality of introduction process and community acceptance. The objective of this study was to conduct a trend analysis of RTS,S malaria vaccine uptake in the seven pilot regions of Ghana from 2019 to 2022. The findings are envisaged to strengthen malaria vaccine introductions in the future.

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Introduction: Savannah Region witnessed a decline in measles-rubella (MR) vaccination coverage prior to the measles outbreak in 2022. This study aimed to assess contributory factors of the low routine MR vaccination coverage and proffer recommendations to improve vaccination uptake.

Methods: A cross-sectional study was conducted in two districts (Bole and Central Gonja) of Savannah Region from December 2022 to June 2023.

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Article Synopsis
  • Quinoline-urea-benzothiazole hybrid compounds showed promising anti-parasitic activities against the 3D7 chloroquine-sensitive strain with effective concentrations ranging from 0.33 to 0.97 μM.
  • Many hybrids performed comparably to chloroquine in inhibiting β-haematin formation, with two compounds showing slightly better efficacy than chloroquine.
  • Molecular docking studies indicated that some compounds had higher binding energies than known drugs like chloroquine and pentamidine, and stability was confirmed through 100 ns simulations, indicating potential for effective enzyme targeting.
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Use of electron microscopy to determine presence of coal dust in a neighborhood bordering an open-air coal terminal in Curtis Bay, Baltimore, Maryland, USA.

Sci Total Environ

December 2024

Community Science and Innovation for Environmental Justice (CSI EJ) Initiative, Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, United States; Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, United States; Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, United States; Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, United States. Electronic address:

Article Synopsis
  • Despite a decline in coal use in the US, over 90 million metric tons were exported in 2023, creating concerns about coal dust exposure among residents of Curtis Bay, Baltimore, who live near an open-air coal terminal.
  • A study aimed to address community concerns by analyzing settled dust samples from two locations near the terminal, using advanced techniques like scanning electron microscopy (SEM) to identify coal particles.
  • The analysis confirmed the presence of coal dust in both residential areas, with higher concentrations closer to the terminal, substantiating the residents' long-standing worries about coal dust accumulation in their environment.
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The impact of the RTS,S malaria vaccine on uncomplicated malaria: evidence from the phase IV study districts, Upper East Region, Ghana, 2020-2022.

Malar J

October 2024

Center of Tropical Medicine and Travel Medicine, Department of Infectious Diseases, Amsterdam University Medical Centers, Location AMC, University of Amsterdam, Amsterdam, The Netherlands.

Article Synopsis
  • The RTS,S malaria vaccine has been authorized for use in areas with moderate to high malaria transmission, specifically targeting children aged 12-59 months in Ghana.
  • A study conducted from 2020 to 2022 found that the vaccine reduced uncomplicated malaria cases by 33%, though the rate of malaria incidence averted showed a decline over time.
  • Researchers concluded that the vaccine effectively lowers malaria burden, but decreasing protective immunity as children age highlights the need for better vaccination uptake and malaria control strategies.
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Article Synopsis
  • Formyl peptide receptors (FPR), especially Fpr1 and Fpr2, are important in directing immune cell movement towards bacterial signals but their role in tuberculosis (TB) immunity has not been well studied.
  • Research showed that levels of Fpr1 and Fpr2 increased in the lungs and blood of mice, rabbits, and humans with TB, indicating they might play a significant role in the immune response against Mycobacterium tuberculosis (Mtb).
  • The study found that while Fpr2 deletion had no effect on TB outcomes, Fpr1-deficient mice had better control of bacterial growth, highlighting the unique functions of Fpr1 in immune response and the need for more research to fully understand its impact on TB
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Mycobacterium tuberculosis (Mtb) infection induces a marked influx of neutrophils into the lungs, which intensifies the severity of tuberculosis (TB). The metabolic state of neutrophils significantly influences their functional response during inflammation and interaction with bacterial pathogens. However, the effect of Mtb infection on neutrophil metabolism and its consequent role in TB pathogenesis remain unclear.

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