Nutritional Requirements of Tritrichomonas foetus with Special Reference to Partially Digested Proteins

1. The amino acids essential for the growth of Tritrichomonas foetus were determined in a medium of known concentration. This flagellate utilizes nitrogen in approximately the same way as do higher organisms. The amino acids essential for T. foetus were determined to be arginine, glycine, tryptophane, histidine, isoleucine, leucine, lysine, threonine, methionine, phenylalanine, proline, serine, and valine.