Determinación de antibióticos en leche cruda bovina

Abstract

Abstract: The use of antibiotics in the livestock sector represents a risk to public health and a challenge for the dairy industry due to the presence of residues in milk intended for human consumption. This qualitative-descriptive study aimed to evaluate the presence and persistence of antibiotic residues in raw bovine milk from the UTPL agricultural station. Three groups of commonly used antimicrobials were analyzed: beta-lactams, tetracyclines, and sulfonamides. Young and adult cattle were inoculated with these veterinary drugs for preventive purposes. The pharmacokinetics and elimination time of each antibiotic were evaluated using rapid immunochromatographic tests (Bioeasy 3-in-1 BST Kit). The results showed significant variations. In the case of beta-lactams, residues were present until day 4. In tetracyclines, the pharmacokinetic finding was absent within the first 2 hours of inoculation, presence within 4 hours, and complete elimination within 5 days. Sulfonamides showed a shorter withdrawal period of only 2 days.