Detection of antibiotic residues in milk is an area of increasing focus to the dairy industry. Dairies are becoming more aware of the dangers of antibiotic residues, consumers are pressing for purer dairy products, and there is a spreading demand from legislators for an implementation of antibiotic detection systems worldwide.
In order to help the dairy industry prevent the negative effects of antibiotic residues in milk, Chr. Hansen now introduces a complete range of antibiotic test kits:
These tests are very fast - incubation time of only 15 and 5 minutes, respectively, and are highly sensitive and detect the ß-lactam group of antibiotics.
These tests are based on inhibition of B. stearothermophilus growth, and they take 3 hours to perform but are able to detect ß-lactams, tetracyclines and sulphonamides simultaneously.
Antibiotic residue testing can be performed at different steps of the milk production process as demonstrated in the illustration.below.
Rapid tests should be used for screening the milk for antibiotic residues. This can be done either at farm level or before the milk is pumped from the tanks of the collecting truck into the silos. The rapid test detects ß-lactams whicht are responsible for more than 95% of the cases where milk is contaminated.
Microbial tests should be performed at the farm level or before the milk is pumped from the silos into the production plant. The microbial test detects the 2 types of antibiotics applied by veterinarians for mastitis treatment - ß-lactams and tetracyclines - and sulfonamides.
Microbial tests can also be used at official laboratories as reference tests for food inspection.
Rapid and microbial antibiotic residues testing should be considered to be complementary actions. A proper protocol of routine analysis in dairies should be designed in order to combine the results of the rapid tests with the wider spectrum of analysis of the microbial tests. Positive results obtained by a rapid test kit should be verified by a microbial test.
More information about Chr. Hansen antibiotic test kits and broshure "Antibiotic test kits" ask PĮ "Baltvita".