Expression of cytolethal distending toxin and hemolysin is not required for pustule formation by Haemophilus ducreyi in human volunteers

R. S. Young, K. R. Fortney, V. Gelfanova, C. L. Phillips, B. P. Katz, A. F. Hood, J. L. Latimer, Jr Munson R.S., E. J. Hansen, S. M. Spinola