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Charm SE, Chi RK, Bryant H, Carson M, Chu WS, Fraser A, Gruetmacher CF, Hostetler O, Jones K, Kenell L, McQuattie R, O’Neill C, Richwine D, Salimbene J, Smith S, Wallace C, Yokote R. Rapid Screening Assay for Beta-Lactam Antibiotics in Milk: Collaborative Study. J AOAC Int 2020. [DOI: 10.1093/jaoac/65.5.1186] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
A 15 min assay for beta-lactam antibiotics has been used by dairies for several years as a screening procedure for testing milk tankers before they unload. The test is based on a competition between 14C-penicillin and beta-lactam antibiotics in the milk samples for sites on a microbial cell wall that specifically binds beta-lactam. In a collaborative study, 11 laboratories correctly distinguished 10 coded zero penicillin G samples and 10 coded 0.01 IU/mL samples. The proposed test is qualitative, positive or negative, and can detect the presence of beta-lactam antibiotics at the 0.01 IU/mL level. The control point for determining positive or negative samples is more than 3 standard deviations from the mean of 0.01 IU/mL. The method has been adopted official first action.
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Affiliation(s)
- Stanley E Charm
- New England Enzyme Center, Tufts University School of Medicine, 136 Harrison Ave., Boston, MA 02111
| | - Ruey K Chi
- New England Enzyme Center, Tufts University School of Medicine, 136 Harrison Ave., Boston, MA 02111
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