Abstract
Staph. aureus was grown in an adequate synthetic medium containing minimal amounts of aneurin (4X10-9M). Aerobically and anaero-bically, the washed cells with pyruvate as substrate showed deficient metabolism in the Warburg apparatus. The metabolism was restored by aneurin (2 X 10-7M) or by its pyrimidine and thiazole components together, in the suspension medium.