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J Dent Res 18(2): 177-183, 1939
© 1939 International and American Associations for Dental Research
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WARM STAGE STUDIES OF DISSOCIATING STREPTOCOCCI FROM DENTAL CARIES

CAROLYN HAMMOND B.S., M.A.1

1 The Foundation for Dental Research of the Chicago College of Dental Surgery

Greening streptococci isolated from dental caries were observed on a warm stage as they changed from R rarr S rarr R. In the R rarr S change the filaments, coiled forms, crescents and bacilli from rough colonies were seen to develop into cocci characteristic of smooth colonies.

In the S rarr R change the cocci elongated into bacilli or filaments with the formation of crescents. The crescents developed into coiled forms and later grew into a mass of twisted filaments.






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