Charm Streptomycin Test (STREP)

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The ROSA STREP test enables dairies and food manufacturers to detect streptomycin and dihydrostreptomycin, antibiotics in the aminoglycoside family, in milk. The STREP test is run by farmers, veterinarians, truck drivers, milk receiving and milk testing laboratories.

Streptomycin residues in milk may lead to antibiotic resistance and can inhibit the growth of yogurt and cheese cultures.

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 results.

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.
  • Sensitive to 25 ppb.
  • Cross reacts with dihydrostreptomycin.
  • Uses same equipment as other ROSA tests.
  • Results can be read in the Charm EZ system.

Regulatory Info:

  • Detects streptomycin and dihydrostreptomycin at or below US safe levels. Has not been evaluated by the National Conference on Interstate Milk Shipments (NCIMS).
  • Detects streptomycin and dihydrostreptomycin at or below EU and CODEX requirements. Central Reference Laboratory (CRL) guidelines available upon request.
  • Detects streptomycin at or below Customs Union import requirements.
  • Russian Technical Regulation on Milk and Milk Products. Federal Law No.88 FL 88 of 12 June 2008.

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