[Problems in the use of radioactively marked bacteria in animal experiments. 1. Labeling of Pasteurella multocida, Pasteurella haemolytica and Salmonella dublin with eH, 14C, 32P, 59Fe, 99mTc, 125J1].

Several methods are suggested by which to use the radionuclides 3H, 14C, 32P, 59Fe, 99mTc, and 125J for labelling or doublelabelling of Pasteurella multocida, Pasteurella haemolytica, and Salmonella dublin, with particular reference being made to labelling ofr animal experiments. Suitable radioactive substrates for internal labelling in chemically defined or partially defined nutritive media include 3H-thymin, 3H-thymidine, 14C-glucose, 14C-mannose, 14C-aspartic acid, as well as 3H-uracil, 3H-uridine, 3H-orotic acid, 14C-orotic acid, 59Fe-III-citrate or chloride, and Na2H32PO4. The choise of the nuclide and substrate should by governed by the problem at hand.