Effects of Contemplated Changes in Standard Methods
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THE Eighth Edition of Standard Methods for the Exa11tination of Dairy Products was published in 1941, and will soon be superseded by the Ninth Edition. In the next edition certain · changes in procedure have been made which are intended to improve the accuracy and reliability of the results obtained by the respective methods. Already concern has been expressed by some that the changes to be made in the Ninth Edition in the pi·ocedures . for the bacteriological ex-. amination of market milk may result in higher counts, and it has even been suggested that bacterial limits in milk ordinances and regulations be raised to compensate for this. It would appear that these suggestions reflect undue apprehei1sion of the potential effects of the relatively few pertinent changes in the next edition of Standard Methods. Accordingly it seems advisable to review these changes and briefly outline their background and probable effects.
[1] R. Howson,et al. A modified resazurin test for the more accurate estimation of milk quality. , 1940 .
[2] L. A. Black,et al. Studies showing the effect of changes in the new (9th) edition of Standard methods in relation to the bacteriological analysis of milk. , 1948, American journal of public health and the nation's health.
[3] A. W. Howard,et al. A Comparison of the Results Obtained from Incubating Bacteriological Plates at 32°C. and 37°C. on the Bacterial Counts of Milk , 1940 .