Publications by authors named "Sody Munsaka"

Background: Infectious disease agents pose significant threats to humans, wildlife, and livestock, with rodents carrying a third of these agents, many linked to human diseases. However, the range of pathogens in rodents and the hotspots for disease remain poorly understood.

Aim: This study evaluated the prevalence of viral, bacterial, and parasitic pathogens in rodents in riverine and non-riverine areas in selected districts in Zambia.

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  • Researchers have identified a rising trend of zoonotic diseases in Zambia, a key transport hub in Southern Africa, where numerous pathogens from bats, rodents, and non-human primates pose public health risks.
  • A review of studies from 1990 to 2022 found that viruses were the most reported pathogens, with notable threats including Ebola, Marburg, and Hantavirus, though many findings are based on short-term investigations.
  • The study highlights a significant lack of surveillance for these diseases in humans and emphasizes the urgent need for improved monitoring and preventive measures to mitigate emerging infectious risks in the region.
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Ticks are widespread arthropods that transmit microorganisms of veterinary and medical significance to vertebrates, including humans. , an ixodid tick frequently infesting and feeding on humans, may play a crucial role in transmitting infectious agents across species. Despite the known association of many ticks with phleboviruses, information on is lacking.

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Background: Antimicrobial resistance (AMR) of pathogens such as is among the top 10 threats to global health. However, clinical and molecular data are scarce in Zambia. We, therefore, evaluated the AMR profiles of nosocomial infections (NIs).

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Objective: Anaemia is associated with an increased risk of disease progression and all-cause mortality among HIV-infected individuals, regardless of the type of anaemia, but the magnitude of the risk is greater with more severe forms of anaemia. Although anaemia PLWH has been extensively studied, the focus has primarily been on its prevalence and association with disease progression in untreated or poorly controlled HIV cases. This study aimed to investigate the prevalence, and factors associated with moderate-to-severe anaemia among virally suppressed HIV patients at a tertiary hospital in Zambia.

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  • Mutations in SARS-CoV-2 have led to the emergence of new variants with potential effects like increased spread, severity, and vaccine resistance.
  • A cross-sectional study in Zambia analyzed 76 SARS-CoV-2 samples from November 2021 to February 2022, identifying 4,097 mutations, with 1,925 occurring in the spike protein.
  • The study found 83 unique amino acid mutations in the spike proteins of various Omicron sublineages, emphasizing the need for ongoing monitoring and pandemic readiness.
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Objectives: To develop two ethical checklists to evaluate (i) management of ethical concerns in research projects and (ii) awareness of ethical conduct of healthcare laboratory professionals.

Methods: Comprehensive discussion among the members of IFCC Task Force on Ethics based on pertinent literature.

Results: This Checklist for Clinical Research Projects should be useful to evaluate research proposals from an ethical perspective before submitting it to an IRB or its equivalent, thereby diminishing rejection rates and resulting in more time-effective projects.

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  • * Ongoing inflammation from HIV infection negatively affects the production and lifespan of red blood cells, increasing the risk of co-infections and leading to more severe anemia and higher mortality rates.
  • * The review emphasizes the importance of understanding the relationship between chronic inflammation, anemia, and cardiovascular issues in PLWH to develop effective treatment strategies.
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  • - The study investigates the genetic diversity of Neisseria gonorrhoeae strains collected from patients in Lusaka, Zambia, highlighting the rising public health threat of antimicrobial resistance (AMR) due to ineffective treatment options.
  • - Researchers sequenced 38 isolates from 122 gonorrhea patients and identified various sequence types (STs) and prevalent AMR genes using whole genome sequencing and bioinformatics tools.
  • - Findings reveal that common AMR genes include blaTeM-1B and tetM, with notable resistance predictions to multiple antibiotics, emphasizing the need for ongoing monitoring and improved strategies for gonorrhea control.
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  • The study investigated the awareness and acceptance of COVID-19 vaccines among 326 pharmacy students in Zambia, finding that while 98.8% were aware of the vaccines, only 24.5% were willing to accept vaccination.
  • Factors influencing vaccine acceptance included being male, single, and unemployed, with males significantly more likely to accept the vaccine compared to females, and unmarried individuals more likely than those who are married.
  • Major barriers to vaccine acceptance reported by students included concerns about side effects (78.5%) and skepticism regarding the vaccine's effectiveness (10.2%).
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  • The study examined the presence of Epstein-Barr virus (EBV) DNA in the cerebrospinal fluid (CSF) of 470 adults living with HIV in Zambia who showed neurological symptoms, finding that 28.9% tested positive for EBV DNA.
  • Key associations with EBV positivity included younger age, shorter HIV duration, and specific CSF findings like low glucose and high protein and white blood cell levels.
  • Despite the high EBV detection rate, the study concluded that EBV DNA load in CSF and blood had limited clinical significance and was not linked to patient mortality.
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Background: Whilst malaria is a prominent aetiology associated with acute kidney injury (AKI) in many parts of Africa, a shift in the traditional AKI aetiologies has been witnessed in sections of the continent. Additionally, limited access to dialysis worsens patient outcomes in these low-resource settings. This retrospective cross-sectional study aimed to determine the associated aetiologies, predictors of need for dialysis and malaria-associated AKI (MAKI), and outcomes of AKI and dialysis among children evaluated by the renal service in Lusaka, Zambia.

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  • Live-attenuated oral rotavirus vaccines like ROTARIX have reduced diarrhoea and infant mortality but show reduced effectiveness in low-income countries.
  • A study in Zambia with 135 mother-infant pairs assessed the impact of maternal and infant histo-blood group antigen (HBGA) profiles on the vaccine's effectiveness, focusing on seroconversion and IgA antibody levels.
  • Results indicated that while early infant HBGA profiles did not significantly affect vaccine responses, infant HBGA profiles were linked to increased immunogenicity at 12 months, highlighting the need for further research to improve vaccine efficacy for young children.
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As COVID-19 vaccines are becoming more available, there is also a growing need to understand the population receiving the doses, existing inequalities and the intention to getting the second vaccine dose among the populations that receive the vaccines. We evaluated gender inequalities and intention to uptake of the second dose of COVID-19 AstraZeneca vaccine among adult populations in selected urban facilities of Lusaka, Zambia. A cross-sectional study design was conducted between May and June 2021 among adults who received AstraZeneca vaccine from three selected urban facilities of Lusaka, Zambia.

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Introduction: the coronavirus disease 2019 (COVID-19) has negatively impacted the mental health of students across the globe. In Zambia, little is known about the psychological impacts of COVID-19 on healthcare students. This study assessed the psychological impact of COVID-19 on health professions students at the University of Zambia.

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Background: Hypertension is common in people living with HIV (PLWH) on antiretroviral therapy (ART). In the general population and in experimental animal models, the incidence of hypertension is greater in males than in females, especially during the premenopausal period. However, it is not known whether there are sex differences in hypertension associated with HIV and ART, and the factors contributing to incident hypertension among PLWH have not been well characterized.

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  • The study explored how mammarenaviruses, specifically the Luna virus (LUAV), are transmitted among rodents in Zambia using advanced sequencing techniques.
  • LUAV was found in 7.7% of the examined rodents, predominantly in semen, with significant presence in fetuses and a correlation with helminth infections in certain cases.
  • Factors such as age, sex, and types of helminths were linked to higher detection rates of LUAV, suggesting a need for further research into how these viruses and co-infections spread.
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Simply detecting Epstein-Barr virus deoxyribonucleic acid (EBV-DNA) is insufficient to diagnose EBV-associated diseases. The current literature around EBV-DNA detection from cerebrospinal fluid (CSF) in human immunodeficiency virus (HIV)-positive non-lymphoma patients was systematically reviewed and a meta-analysis reporting the estimated pooled prevalence in this population when PCR methods are employed, targeting different sequence segments within the EBV genome, was conducted. Using a combination of three key concepts-Epstein-Barr virus detection, central nervous system disease, and human cerebrospinal fluid-and their MeSH terms, the PubMed database was searched.

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  • The study investigates whether HIV-1 subtype C can be detected in brain tissue, specifically looking at viral load differences across various brain regions in a 38-year-old Zambian woman who died from HIV/AIDS.
  • Using advanced PCR techniques on brain tissue samples, the researchers found that 35.9% of tissue blocks contained HIV-1 viral DNA, with the highest concentrations in the basal ganglia and frontal lobe.
  • Significant differences in viral load were reported between certain brain regions, indicating a non-uniform distribution of HIV-1 in the brain.
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Background: High blood pressure (BP) is associated with high-salt consumption especially in sub-Saharan Africa. Although the pressor effect of salt is viewed as a chronic effect, some studies suggest that a salty meal may increase BP immediately in some individuals, and that this effect may cause endothelial dysfunction. Therefore, the aim of our research was to study the immediate pressor response to oral salt (IPROS) and its determinants, with the expectation that a simple methodology may be devised to diagnose it in the clinic or in low-resource environments.

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  • Neisseria gonorrhoeae, the bacteria causing gonorrhea, is increasingly resistant to available antibiotics, which limits treatment options and worsens the health impact of the infection, particularly in Zambia where data on resistance is limited.
  • A study involving 630 STI patients in Lusaka from 2019 to 2020 identified N. gonorrhoeae in 19.4% of cases, with a higher prevalence in males and individuals aged 25-34 years.
  • The findings revealed high resistance rates to penicillin (85.2%), tetracycline (68.9%), and ciprofloxacin (59.8%), although all isolates were still susceptible to ceftriaxone, highlighting the need for continued monitoring
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  • - The study compares the immune response of HIV-positive and HIV-negative tuberculosis (TB) patients by analyzing the expression levels of certain cytokines (IL-6, TNF-α, IFN-γ, IL-10) in whole blood after stimulation with heat-killed Mycobacterium tuberculosis.
  • - A total of 70 TB patients were enrolled, revealing that HIV-negative patients had significantly higher IL-6 levels than HIV-positive patients, particularly in those with CD4 counts below 500 cells/mm³.
  • - Positive correlations were found between TNF-α and IL-6 in both HIV groups, indicating a relationship in immune response despite differences in their cytokine profiles.
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Background: Lymphomas usually present with different occurrence patterns across different geographical locations, but their epidemiology in Zambia is yet to be extensively explored.

Objectives: To study the spectrum of lymphoma subtypes prevalent within the Zambian population.

Methods: Histopathological records with suspected lymphoma at the University Teaching Hospital (UTH) in Lusaka from the year 2014 to 2016, diagnosed based on the 2008 World Health Organization (WHO) criteria were reviewed.

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The malignant phenotype of tumour cells is fuelled by changes in the expression of various transcription factors, including some of the well-studied proteins such as p53 and Myc. Despite significant progress made, little is known about several other transcription factors, including ELF4, and how they help shape the oncogenic processes in cancer cells. To this end, we performed a bioinformatics analysis to facilitate a detailed understanding of how the expression variations of ELF4 in human cancers are related to disease outcomes and the cancer cell drug responses.

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  • Lean individuals living with HIV (PLWH) showed greater immune activation, as indicated by higher percentages of activated CD4+ and CD8+ T cells compared to HIV-negative controls.
  • The study found a negative correlation between certain types of immune activation (specifically senescent CD4+ and activated CD8+ T cells) and arterial stiffness, measured through different pulse wave velocity metrics.
  • Despite lower arterial stiffness measures in PLWH, they exhibited a higher carotid-femoral augmentation index, suggesting a complex relationship between immune activation and vascular health that requires further investigation.
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