Abstract
Production of oxytetracycline by
Streptomyces rimosus 1207 as an animal feed supplement was achieved in a fermentation medium containing the following ingredients (g litre
−1): black-strap molasses, 30; fodder yeast, 20; rice bran, 10; KH
2PO
4, 0·2 and tap water. The dry mash, containing oxytetracycline, thus produced was 50 g litre
−1 of fermentation medium. The amount of oxytetracycline present in the dry mash was about 4%. The dry mash containing the oxytetracycline was analysed for the amino acids
l-arginine,
l-histidine,
l-lysine,
l-isoleucine,
l-leucine,
l-phenylalanine,
dl-methionine and
l-tryptophan which could be of nutritional value for chickens.