OBSERVATIONS ON THE BLOOD CYTOLOGY IN EXPERIMENTAL SYPHILIS : II. THE PERIOD OF DISEASE LATENCY.

The mean blood cell levels of 35 latent syphilitic rabbits in which all lesions had undergone spontaneous regression and complete healing were compared with weighted values for normal rabbits. The only differences noted were in the red cell count and hemoglobin content, both of which were significantly lower in the experimental group than the normal values. A parallelism was observed between the blood cell changes of the experimental disease after spontaneous regression of lesions, and the cell changes in the human disease after treatment. This parallelism lends additional weight to deductions drawn from the experimental disease as applied to human syphilis.