Qualidade do leite cru produzido no agreste de Pernambuco

Abstract

Quality and food safety have received increasing attention of the world population, especially in relation to chemical and microbiological hazards in foods. The presence of antibiotic residues at levels above the maximum residue limit (MRL) renders the milk unsuitable for use in industry and human consumption, since no technological treatment can degrade these substances, without compromising the nutritional value of milk. This study aimed to evaluate the chemical composition, somatic cell count (SCC), total bacterial count (TBC) and the presence of antibiotic residues in raw milk produced in rural Pernambuco. 184 samples were collected, between winter 2012 and summer 2013, the producers supplying raw milk to dairy Federal Inspection Service (SIF), State Inspection Service (SIE) and No Inspection Service (SSI). For detection of antibiotic residues used liquid chromatography coupled to mass spectrometry (LC-MS/MS). The results of physicochemical and CCS in general, were in accordance with Instruction 62 (IN 62, MAP). As for CBT, there was significant difference between the inspection services: over 80% of the results for SIF were in accordance with the IN 62, while for SIE and SSI less than 50% achieved the same result. Qualitative analysis of multiresidues, none had violation for antibiotics analyzed. The quantitative analysis of a sample -lactams, the producers supplying the dairy SIE in the summer of 2013, showed superior results to the MRLs for cloxacillin (464 ppb). So the milk produced in the arid zone of Pernambuco caters generally to the values established by legislation for chemical composition, SCC and antibiotic residues. However, for SIE and SSI CBT results were largely in excess of the limits established by law.