








Microbiological tests for antibiotic residues are broad-spectrum tests capable of detecting a wide variety of antibiotics, including beta-lactams, tetracyclines, sulfonamides and aminoglycosides. The tests utilize bacterial spores suspended in agar media and results are developed as a color change, by either a pH or redox indicator.
Chr Hansen offers two product lines of microbiological tests:
BRT Inhibitor Tests - produced by AiM in Germany, a company deeply integrated into and knowledgeable about antibiotic residue testing as it springs from the dairy industry and milk testing organisations in Southern Germany. The BRT Inhibitor test is a rather fast microbiological test (approx 2½ hour) and the assortment is versatile with formats including tubes, 96-well plates and an economical "in between" format of 8-well strips. Also, the range includes positive and negative milk controls for best practice and safety of results.The BRT tests work well with milk from cow, goat and sheep.
The CMT test is a classical pH based microbiological test, well implemented for many years and a reference method in many dairies and control laboratories. The test is available as 25 or 100 tubes, delivered complete with 100 ul "no drop" pipettes, as well as 96-well plates for high throughput. A temperature indicator on each box ensures product integrity agaist high temperatures during shipping.