Browsing by Author "Kato, Charles Drago"

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    Assessment of alternative approaches of primary cervical cancer screening among women in low-income environments
    (Journal of Cancer Research and Experimental Oncology, 2021-01) Eilu, Emmanuel; Akinola, Saheed Adekunle; Tibyangye, Julius; Adeyemo, Rasheed Omotayo; Odoki, Martin; Adamu, Aliero Almustapha; Onkoba, Sarah Kemuma; Kemunto, Moindi Jeridah; Abyola, Ismail Adebayo; Kato, Charles Drago
    Alternative techniques for detecting cancer of the cervix uteri alongside its early precancerous lesions still remain necessary for low income environments since morbidity and mortality due to cervical cancer continues to be on the rise. We recruited one thousand and seventy-seven women aged 15-55 years from selected study hospitals in Eastern Uganda and examined them using Papanicolaou (Pap) smear, direct visual inspection with 5% acetic acid solution (VIA), and human papillomavirus (HPV) DNA testing. Study participants detected with high-grade lesions (HSIL) or cancer cells on Pap smear test, positive VIA test (acetowhite lesions, cervical ulcer or growth), and positive high-risk HPV DNA (relative light units (RLU) were immediately scheduled for colposcopy and cervical biopsy. Of the forty percent of the women confirmed with pap smear positive, 43 of the 63 women had invasive carcinoma (68.3%), while 89 out of 137 women with confirmed biopsy were diagnosed with high grade CIN (CIN2,3) (65%). DVI identified 46 of 63 carcinomas (73%) as well as 47 of 74 high grades CIN (CIN 2, 3) (64%). There was a variation in HPV DNA results due to the cutoff value considered in defining the final result. HPV DNA of high-risk HPV types was detected 39 (61.9%) out the 63 women diagnosed invasive cervical cancer, while 66 (73.3%) or 46 (51%) was detected in the biopsy of women diagnosed with high grade CIN (CIN 2,3). Similarity in identification of high-grade cervical abnormalities was registered by the testing methods. Both VIA and HPV genetic testing methods diagnosed similar numbers of high grade CIN 2,3 and invasive cancer cases as Pap smears. Nevertheless, individual test methods categorized study participants with no cervical disease as being positive.
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    Legacy and emerging organic pollutants in indoor and outdoor environments in africa: contamination levels, health risks, and analytical techniques
    (Elsevier, 2025-01-02) Muhwezi, Godfrey; Kyarimpa, Christine; Gumula, Ivan; Nagawa, Christine Betty; Omwoma, Solomon; Matovu, Henry; Matsiko, Julius; Odongo, Silver; Sifuna, Douglas; Špánik, Ivan; Kato, Charles Drago; Ssebugere, Patrick
    The World Health Organisation reported that over 20% of the global disease burden and deaths are caused by environmental factors such as air and dust pollution. Legacy organic pollutants (LOPs) and emerging organic pollutants (EOPs) are among the biggest contributors to this burden. Herein we reviewed literature published for the period 2000-2023 on selected LOPs and EOPs in indoor dust and outdoor air in Africa to understand the occurrence, associated human health risks and common analytical techniques used to identify and quantify these contaminants. The findings revealed generally lower contamination levels for most pollutants than that in most regions outside Africa except for PCBs in outdoor air and OCPs in indoor settled dust. Apart from a few studies for polychlorinated biphenyls (PCBs), most studies reported hazard index (HI) values less than 1 for outdoor air and indoor dust exposure, which suggested negligible non-carcinogenic risks in children and adults. Gas Chromatography and mass spectrometry were the most frequently used analytical techniques for both air and dust probably due to their sensitivity and selectivity in detecting chemical traces at the pg m-3 and ng g−1 levels. Although the current contamination levels are generally low, their synergistic and cumulative effects may in the long run affect the environment and human health. There is also a paucity of data on most contaminants, especially for PCNs, and PFASs in both outdoor air and dust. Coordinated efforts are needed to limit the trade, importation, and disposal of products containing LOPs and EOPs in Africa.