Application of synthetic solid culture medium to improve the detection of antimicrobial drug residues in foodstuffs

Szita, G. and Bernáth, S. and Szili, Zs. and Szita, J. and Hullár, I. and Erdősi, O. (2014) Application of synthetic solid culture medium to improve the detection of antimicrobial drug residues in foodstuffs. Acta Alimentaria, 43 (3). pp. 373-377. ISSN 0139-3006

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Abstract

A selective synthetic solid minimal medium (BS agar) was developed to detect antimicrobial drug-residues in foodstuffs using Bacillus subtilis indicator culture. This medium contains an ammonium salt as nitrogen source and either glucose or sodium pyruvate as carbon sources.Its selectivity is based on the fact that Bacillus subtilis is still able to grow if the minimal medium consists of simple inorganic substances as nitrogen sources, and glucose or pyruvate as carbon supply. Using these new synthetic media for microbiological assays assessing certain antimicrobials, the diameter of the inhibition zones were 1.4–4 times wider than on the Mueller-Hinton agar.The advantages of the BS agars are their standard compositions, the absence of inhibitors, the reproducible quality and the low costs.

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