Utilização do Delvotest® SP-NT, Eclipse 50 e Twinsensor – BT 20 na detecção de resíduos de antimicrobianos em amostras de leite “in natura provenientes de quatro bacias leiteiras do Estado do Maranhão

Abstract

Milk is a high nutritional value food, widely consumed by humans and it’s one of the main food in children’s diet. A main point in the quality of milk is the absence of contaminants, such as antimicrobial residues. The accidental or indiscriminate use of antimicrobials in dairy products may lead to the occurrence of residue levels above the MRLs (Maximum Residue Limits) permitted by law, an issue both in the economic and public health. This study aimed to find residues of antibiotics in raw milk sample milk basin in the municipalities of Itapecuru Mirim, Bacabal, Imperatriz and the island of São Luís, using commercial kits for screening (Delvotest® SP-NT, Eclipse 50 and Twinsensor - BT 20), to compare the efficacy between the tests and to get information about the management practices adopted in the properties. We analyzed 96 samples of raw milk, taken directly from the brass, from January to November 2009, from 96 farms. From 96 samples analyzed, one (1.04%) was contaminated by β-lactam antibiotics, the testing Twinsensor - BT 20, three (3.12%) positive for residues of antimicrobials in Delvotest® SP-NT and Eclipse 50. There was no significant statistical difference between the size of the farms (dairy) and the presence of antibiotic residues in milk. The use of antimicrobials to treat diseases of livestock and the presence of antibiotic residues in milk was statistically significant (p = 0.0038) in Delvotest® SP-NT and Eclipse 50, and the gentamicin and oxytetracycline the active principles used frequently. The results indicate that the milk produced in four milk basin in Maranhão may pose a threat to public health and the sorting Delvotest® SP-NT and Eclipse 50 were efficient in detecting residues of antibiotics.