Table 3 Oxytetracycline residue concentrations (µg/kg) in muscles, liver and kidney samples from Kiruhura, Mbarara and Ntungamo districts of South Western Uganda during the dry and wet seasons
Season | District | OTC residues | Muscle | Liver | Kidney |
|---|---|---|---|---|---|
Dry season | Kiruhura | Mean ± SD | 1094 ± 378 | 967 ± 198 | NA* |
Range | 33–1505 | 129–2616 | NA | ||
Percentage positive samples above MRLs | 67.86% | 58.62% | NA | ||
Mbarara | Mean ± SD | 668 ± 163 | 3778 ± 1140 | 12,576 ± 1630 | |
Range | 55–2273 | 21–26,226 | 6587–18,565 | ||
Percentage positive samples above MRLs | 75.00% | 85.71% | 100% | ||
Ntungamo | Mean ± SD | 586 ± 123 | 5194 ± 1463 | 969 ± 187 | |
Range | 21–3189 | 25–56,590 | 738–1201 | ||
Percentage positive samples above MRLs | 76.19% | 76.19% | 0.00% | ||
Wet season | Kiruhura | Mean ± SD | 381 ± 159 | 926 ± 291 | NA |
Range | 21–1237 | 112–4365 | NA | ||
Percentage positive samples above MRLs | 46.15% | 53.85% | NA | ||
Mbarara | Mean ± SD | 1585 ± 447 | 1367 ± 379 | 1366 ± 341 | |
Range | 10–6304 | 49–3616 | 77–7073 | ||
Percentage positive samples above MRLs | 87.50% | 87.50% | 82.61% | ||
Ntungamo | Mean ± SD | 679 ± 175 | 744 ± 302 | NA | |
Range | 29–1394 | 47–3799 | NA | ||
Percentage positive samples above MRLs | 95.00% | 90.00% | NA | ||
FAO/WHO limit (FAO/WHO 2014) | 200 | 600 | 1200 | ||