Study of Selective Media for Coli‐Aerogenes Isolation

sacrificing sensitivity to any strains of the coli-aerogenes group. This study has been divided into three parts. The first step was to study the comparative coli-aerogenes productivity or growth response with a variety of strains. The second was to check the inhibitive qualities of these media on some of the common organisms encountered in water analysis which give false presumptive tests in lactose broth. If any of the media prove advantageous during the first steps of this study practical tests will be carried out. At the present time the first section of the study is practically complete and the second part is well under way. All of the work was performed in a number of cooperating laboratories for the committee. The cooperatore on the study include the following: Leo F. Ey and Rosemary Bole, Ohio Department of Health; Michael A. Farrell, Pennsylvania State College; F. W. Gilcreas, New York State, Department of Health; R. F. Goudey and Madeline Lynch, Department of Water and Power, Los Angeles; Murray P. Horwood and C. G. Dunn, Massachusetts Institute of Technology; Bernard H. Jeup and Marion S. Campbell, Indiana Division of Public Health; Stewart A. Koser and Raymond Spoelstra, University of Chicago; A. L. MacNabb and A. D. McClure, Ontario Department of Health; Jane H. Rider, Arizona State Laboratory; Cassandra Ritter, Kansas Board of Health; Col. J. T. Siler and Major H. R. Livesay, Army Medical School; Robert Spaulding Spray, West Virginia University;