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Media for the Enhancement of Fluorescent Pigment Production by Pseudomonas Species

¹ Western Regional Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Albany, California 94710

ABSTRACT

By a simple modification, common commercial dehydrated laboratory media can be used for the evaluation of fluorescent pigment excretion by Pseudomonas species. The addition of sufficient sterile egg white or of the iron-binding egg white protein, conalbumin, to bind all the iron in these media converted them to efficient diagnostic media. The amount of egg white found to be satisfactory was 10% of the final medium volume. Its conalbumin equivalent was 1.7 mg of conalbumin per ml of final medium. Such modified media are at least the equivalent of the medium recommended for the evaluation of this important characteristic.