New process for T-2 toxin production

Abstract

Strains of Fusarium produced high levels of T-2 toxin when cultured on certain media absorbed into vermiculite. Modified Gregory medium was nutritionally complex (2% soya meal, 0.5% corn steep liquor, 10% glucose) and, when inoculated with the appropriate fungal strain, yielded maximum T-2 toxin, within 24 days of incubation at 19°C. On Vogel synthetic medium N supplemented with 5% glucose, optimal toxin levels were synthesized after incubation for 12 to 14 days at 15°C. Fusarium tricinctum T-340 produced 714 and 353 mg/liter on modified Gregory medium and Vogel synthetic medium N plus 5% glucose, respectively. Improved analytical procedures were developed and involved aqueous methanol extraction, purification by liquid-liquid partitions, and gas-chromatographic quantitation.