Browsing by Author "Kiganda, Ivan"

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    Fatty acid composition and cholesterol distribution in edible tissues of long-horned Ankole cattle
    (Journal of Food Composition and Analysis, 2025-12-02) Wanyama, Joseph; Kwetegyeka, Justus; Twinomuhwezi, Hannington; Omara, Timothy; Kiganda, Ivan
    Ankole cattle is a vital genetic resource and an economic asset in East and Central Africa, usually reared for their beef and milk. For the first time, the total lipid content, fatty acid composition and cholesterol concentration in beef of Ugandan long-horned Ankole cattle were determined using gas chromatography-mass spectrometry and high performance liquid chromatography. Significant variations in the total lipid content, fatty acid composition and cholesterol concentration were observed among the different samples, with the liver and kidneys possessing the highest values (P < 0.05). The fatty acid composition followed the order: monounsaturated fatty acids> saturated fatty acids > polysaturated fatty acids. Nutritional indices indicated that the kidney, liver, and heart had better fatty acid compositions. In contrast, the rib, large intestine, and chuck had higher atherogenic and thrombogenic indices, which may be associated with increased risks of cardiovascular diseases when consumed.
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    Tetracycline residues in milk and beef from the Ugandan cattle corridor
    (Journal of Environmental Science and Health, Part B, 2026-02-05) Mwesigye, Justus; Kwetegyeka, Justus; Gumula, Ivan; Omara, Timothy; Kiganda, Ivan
    Veterinary antibiotic residues in foods of animal origin (FOAO) are of public health concern because they can contribute to antimicrobial resistance, disruption of gut microbiota, hypersensitivity reactions and developmental effects following chronic exposure. This study investigated the occurrence of six veterinary tetracyclines (oxytetracycline, tetracycline, doxycycline, chlortetracycline, demeclocycline and methacycline) in FOAO from the Ugandan Cattle Corridor districts of Nakaseke and Nakasongola. Raw milk, muscle tissue, liver and kidneys were analyzed for tetracyclines using high performance liquid chromatography and liquid chromatography-tandem mass spectrometry. District-wise analysis revealed a moderate prevalence of tetracycline residues in milk (5.3–42.1%) and beef (7.7–69.2%), with oxytetracycline being the most detected. Of these, 5.3–69.2% of the samples had oxytetracycline, methacycline and tetracycline concentrations exceeding their maximum residue limits established by the European Union Commission Regulation No. 37/2010. These results provide baseline data on the presence of tetracycline residues in marketed FOAO from the Ugandan Cattle Corridor. It emphasizes the need for strengthened antimicrobial stewardship, enforcement of veterinary drug withdrawal periods, and routine national antimicrobial residues monitoring in FOAO.