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  • Title: [Diagnosis of fecal coliforms in dairy products by the temperature tests].
    Author: Ikonomov L.
    Journal: Vet Med Nauki; 1980; 17(2):79-84. PubMed ID: 7001729.
    Abstract:
    The study concerned the formation of gas and acid in broth with lactose and glucose and brilliant green at 30,37 and 44 degrees C and of indole in peptone water at 30, 37 and 44 degrees C by 842 coliform strains isolated from 386 samples of dairy products (E. coli I--496, E. coli--51, Citrob. freundi--87, Citrob. intermedium--46, Enterobacter aerogenes--98, Enterobacter cloacae -- 32 and K1. aerogenes 32). It was found that Eijkman's test (formation of gas and acid from lactose in broth with brilliant green at 44 degrees C) yields no real results and cannot be used for rapid differentiation of the fecal coliforms. The test of McKenzie, Taylor and Gilbert (formation of gas and acid from lactose in broth with brilliant green at 44 degrees C and indole at 44 degrees C) gives satisfactory results for quick determination of the expected E. coli I amount. E. coli I amount should be determined solely on the basis of IMVIC tests.
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