Oxytetracycline residues in bovine muscles, liver and kidney tissues from selected slaughter facilities in South Western Uganda

Abstract

Background Due to high disease burden and poor animal health services in Uganda, administration of antimicrobials particularly oxytetracycline (OTC) is often done by farm owners and workers without any prescription. This results in misuse of OTC with consequent high chances of antibiotic residues and antimicrobial resistance hence posing public health threat. The degree of public health threat from OTC use is not well established due to limited published data on antibiotic residues and usage in livestock production in Uganda. This study comparatively determined OTC residue levels in 318 samples of bovine muscles, liver and kidney tissues from Kiruhura, Mbarara and Ntungamo districts of South Western Uganda during dry and wet seasons. Results The results revealed that the overall OTC residues positivity levels was 74.84% while the district wise rates were 56.88%, 84% and 84.52% for Kiruhura, Mbarara and Ntungamo, respectively. The mean OTC residue levels in bovine muscles, liver and kidney tissues were above the recommended maximum residue limits of 200, 600 and 1200 µg/kg, respectively as established by FAO/WHO. Of the collected samples, 72.41% (236/318) had OTC residues in concentrations above the recommended maximum residue limits. Wilcoxon signed rank test results showed that change in the seasons did not cause any significant changes in the liver OTC residue levels for all the districts, though this was significant for muscles from Kiruhura and Mbarara districts. Unacceptably high OTC levels were found in the muscles, liver and some kidney samples: Kiruhura muscles and liver samples had mean OTC concentrations of 1094 ± 378 µg/kg and 967 ± 198 µg/kg; Mbarara muscles, liver and kidney samples had mean OTC mean concentrations of 668 ± 163 µg/kg, 3778 ± 1140 µg/kg and 12,576 ± 1630 µg/kg, respectively while Ntungamo samples had mean OTC concentrations of 586 ± 123 µg/kg and 5194 ± 1463 µg/kg in muscle and liver tissues. Conclusions The results of this study indicated that there are unacceptably high OTC residue levels in bovine tissues consumed in South Western Uganda. This poses a public and veterinary health threat to consumers of these bovine tissues.

Determination of Tetracycline Residues in Kidney and Muscle of Beef Cattle Slaughtered in Dire Dawa and Harar Municipal Abattoirs, Eastern Ethiopia

“…18 S imilarly, it was in line with the finding reported from Uganda, which reported that the prevalence of positive samples ranged from 56.88% to 84.52%. 35 Similarly, the finding of the current study was in line with the finding of another study conducted in Iran, which reported 75% of meat samples positive for tetracycline. 36 The findings suggest that oxytetracycline was indiscriminately used in the study areas.…”

Effect of Changes in Veterinary Feed Directive Regulations on Violative Antibiotic Residues in the Tissue of Food Animals from the Inspector-Generated Sampling in the United States

“…For example, tetracycline residues have been found at the injection site as many as 35 days after intramuscular administration [ 30 ]. In addition, previous studies have reported that tetracycline residue levels were higher in muscles than in kidneys [ 31 , 32 , 33 , 34 ], regardless of regulations. Future experimental and epidemiologic field studies could generate knowledge on host- and farm-level factors associated with tissue levels of tetracycline residues in food animals in the U.S.…”

Thermoacoustic sensor-based system for detection of respiratory diseases in chicken (Gallus domesticus L.)

“…The global population is increasing steadily, and will necessitate a marked increase in food production so as to support the estimated 9.1 billion people expected to exist on planet earth by 2050 [1]. Poultry farming is an agricultural sector which plays, and will continue to contribute a signi cant role in realizing the envisaged food security [2,3]. Chicken (Gallus domesticus L.) is the most domesticated poultry bird in the world, with a global number of 33 billion in 2020 [4].…”