The sanitary significance of low coliform densities of pasteurized dairy products and the importance of using laboratory methods sufficiently sensitive to detect such densities are stressed. A comparative study of common solid media and brilliant green bile broth reveals frequent failure of solid media, as usually employed, to yield typical colonies in cases of gross coliform contamination and the superiority of the tube method for examining pasteurized samples with low coliform densities.
Dr. Jacques Archambault received his B. S. degree (Chemical Engineering) in 1924 and his D. Sc. degree in 1941, from the “Ecole Polytechnique” of Montreal University. He has been with the Quebec Ministry of Health since 1924. After serving in the Division of Sanitary Engineering from 1924 to 1927, he joined the Division of Laboratories as Chemist, became Chief Chemist of the Laboratory of Chemistry and Sanitation in 1933, Associate Director of the Division in 1944 and Director of Laboratories in 1953. He is Referee for Detection of Coliforms in Dairy Products, A.P.H.A. Standard Methods Sub-Committee.