Detection of Penicillin and Streptomycin in Milk by Impedance Microbiology

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Abstract
A Bactometer 123 impedance instrument detected .001 IU penicillin or streptomycin/ml of sterile milk inoculated with 5% active lactic culture. Results were available in 5 to 10 h. Inactive lactic culture produced results in less than 24 h. Impedance instruments can monitor incoming milk supplies simultaneously for bacterial load, abnormal milk, and antibiotics.