[Effect of mycotoxin T-2 on bioluminescence intensity of bacteria]

The acute and chronic toxicity of T-2 was studied by bioluminescent method with the use of two strains of luminous bacteria--P. phosphorum Sq3 u V. fischeri F1 as biological objects. It was shown that in acute experiments after 10 min incubation of bacteria in the presence of T-2 the bioluminescence inhibition on the 50% level was observed at the toxin concentration equal to 12 mg/mL. In chronic experiments such a level of bioluminescence inhibition was registered after 16 hours incubation at the toxin concentration of 18 mg/mL. T-2 toxicity was also investigated in the presence of different serum albumin concentrations. It decreases with the increase of albumin concentration at the short term of incubation (5 min) of the mixture to be analyzed. In case of the longer term of incubation (up to 30 min) of this mixture T-2 toxicity was restored. Probably, it is a result of destruction of protein-toxin complex, which is, evidently, reversible and may be characterized by some index. It is necessary to emphasize that the sensitivity of T-2 analysis increases under the decrease of pH value up to lower bacterial physiological level, i.e. to 5-5.5. The revealed abilities of T-2 toxin effect on the intensity of bacterial bioluminescence may be used under the development of instrumental analytical approach on the basis of biosensor technology for testing this toxin in the environment. Taking into account the analysis simplicity and rapidity, such analytical device may have a perspective for wide practical application.