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J Dent Res 29(3): 298-303, 1950
© 1950 International and American Associations for Dental Research
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EVALUATION OF THE COLORIMETRIC (SNYDER) TEST

I. COMPARISON OF POSITIVE COLOR REACTIONS WITH THE LACTOBACILLUS COUNTS OF RESPECTIVE SPECIMENS OF SALIVA ROUTINELY SUBMITTED FOR CULTURE

MARSHALL L. SNYDER Ph.D.1 and MARGERY K. CLARKE B.S.1

1 Department of Bacteriology, University of Oregon Dental School, Portland, Ore.

Comparison of data obtained by the Snyder test with lactobacillus counts of respective specimens of saliva showed the following relationships:

1. With less than 10,000 lactobacilli/c.c. saliva, 98 per cent of specimens failed to produce a positive color reaction in 24 hours and 71.5 per cent in 48 hours.

2. With more than 10,000 lactobacilli/c.c. saliva, 33.4 per cent of specimens induced positive color tests in 24 hours and 90 per cent in 48 hours.

A practical interpretation of these results for possible office use of the Snyder test is offered.

Submitted on November 14, 1949
Revised on February 4, 1950






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