Browsing by Author "Ngingo, Baraka"

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    Dengue Virus Infection and Associated Risk Factors in Africa: A Systematic Review and Meta Analysis
    (MDPI, 2021) Mwanyika, Gaspary O.; Mboera, Leonard E. G.; Rugarabamu, Sima; Ngingo, Baraka; Sindato, Calvin; Lutwama, Julius J.; Paweska, Janusz T.; Misinzo, Gerald
    Dengue contributes a significant burden on global public health and economies. In Africa, the burden of dengue virus (DENV) infection is not well described. This review was undertaken to determine the prevalence of dengue and associated risk factors. A literature search was done on PubMed/MEDLINE,Scopus,Embase, andGoogleScholar databases to identify articles published be tween 1960 and 2020. Meta-analysis was performed using a random-effect model at a 95% confidence interval, followed by subgroup meta-analysis to determine the overall prevalence. Between 1960 and 2020, 45 outbreaks were identified, of which 17 and 16 occurred in East and West Africa, respectively. Dengue virus serotype 1 (DENV-1) and DENV-2 were the dominant serotypes contributing to 60% of the epidemics. Of 2211 cases reported between 2009 and 2020; 1954 (88.4%) were reported during outbreaks. Overall, the prevalence of dengue was 29% (95% CI: 20–39%) and 3% (95% CI: 1–5%) during the outbreak and non-outbreak periods, respectively. Old age (6/21 studies), lack of mosquito control (6/21), urban residence (4/21), climate change (3/21), and recent history of travel (3/21) were the leading risk factors. This review reports a high burden of dengue and increased risk of severe disease in Africa. Our findings provide useful information for clinical practice and health policy decisions to implement effective interventions
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    Evaluation of Antibacterial Activity of Tanzanian Gooseberry (Physalis peruviana) Leaf Extract against Multi-Drug Resistance Escherichia coli and Salmonella typhi
    (MJRD, 2024-12-05) Ngingo, Baraka; Magesa, Felista; Shebughe, Ramadhani; Rugumisa, Bernadether; Lwilla, Johnson; Mzena, Theopista; Ruhembe, Carolyne
    This study was conducted to evaluate in-vitro antibacterial activities of methanolic leaf extract of Physalis peruviana growing in Dodoma, Tanzania, against multidrug-resistant bacteria (Escherichia coli and Salmonella typhi) using agar well diffusion and standard microdilution methods. Moreover, leaf extract was screened qualitatively for the presence of phytoconstituents using standard methods. Methanolicleaf extract of P. peruviana (from 0.2 mg/mL to 0.4 mg/mL concentrations) showed antibacterial activity against tested E. coli and S. typhi with zones of inhibition ranging from 19 to 21 mm and 17.7 to 22 mm, respectively. The micro-dilution method revealed the minimum inhibitory concentration of methanolic leaf extract of P. peruviana to be 10 µg/µL and 5 µg/µL for E. coli and S. typhi, respectively. Qualitative phytochemical analysis of methanolic leaf extract of P. peruviana identified the presence of tannins, cardiac glycosides, alkaloids, terpenoids, steroids, flavonoids, and phenols. Methanolic leaf extract of P. peruviana has antibacterial activity against multidrug-resistant bacteria (E. coli and S. typhi). This plant may be a promising new source of future antibiotics that potentially combat the existing problem of antimicrobial resistance.