An evaluation of the Delvo X-press beta-L test for detecting beta-lactams in ex-farm raw milks
Scannella, D.; Neaves, P.; Keedy, K.; Bell, C.
International Dairy Journal 7(1): 93-96
The detection of antimicrobial residues in ex-farm, bulk, raw, cows' milk by the Delvo X-Press beta-lactam test and by the Delvotest P was compared. Of 500 samples, 499 gave the same results by the two procedures. One sample classified as Delvotest P-negative gave a borderline positive result with the Delvo X-Press test but a negative result upon re-test. Fifty samples giving positive results by the Delvotest P procedure were also positive by the Delvo X-Press test; all contained penicillinase-sensitive beta-lactams. The results of this study indicate that the Delvo X-Press test could accurately detect beta-lactams in bulked, ex-farm raw milks.