Charm Tetracycline Test (TET)

Not intended for sale in the US.

The Charm ROSA TET test enables dairies to detect tetracycline residues in milk, so they can meet both regulatory and cultured product manufacturing requirements.

The Charm ROSA TET test detects three tetracycline drugs at or below the EU and CODEX MRL. With sample dilution, the ROSA TET also meets US tolerance levels. This test is run by farmers, veterinarians, truck drivers, milk receiving, and milk testing laboratories.

This 8-minute Rapid One Step Assay is performed with a lateral flow strip in the Charm EZ system or ROSA Pearl-X Reader. After adding sample, incubate and read qualitative results. The EZ system can be set up to run in a vehicle or to transmit data to a LIMS system. With the Charm ROSA TET test, dairy farmers can increase the amount of milk they send to market. They can test individual cows and safely clear each cow days earlier than without testing.

Lower operating costs and improve transportation efficiency by clearing good milk quickly with the Charm ROSA (Rapid One Step Assay) lateral flow strips which detect aflatoxin M1 and the most common antibiotics used to treat dairy cows. ROSA tests use patented technology to target drug sensitivities to safe and regulated levels, which prevents unnecessary rejection of milk caused by overly sensitive screening tests. The tests are easy to perform and are manufactured to test for US safe levels, EU MRL/ CODEX/ Customs Union maximum residue limits and multiple other country-specific requirements. Charm ROSA tests have been granted approval by regulatory authorities around the world.

Test results from ROSA strips may be read and officially recorded using the Charm EZ system, or the ROSA Pearl-X Reader, or may be interpreted visually in an unofficial capacity, making it ideal for farm use.


  • Results in 8 minutes
  • Detects three tetracycline drugs
  • Uses same equipment as ROSA tests
  • Can be used in the Charm EZ system

Regulatory Info

  • Detects three tetracycline drugs at or below US safe level with dilution confirmation step. Has not been evaluated by National Conference on Interstate Milk Shipments (NCIMS).
  • Detects three tetracycline drugs at or below European and CODEX MRL. Central Reference Laboratory (CRL) guidelines available upon request.


The TET Test is easily read on:

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