Viscosity of the spent culture media obtained from Prevotella intermedia strains 17, OD1-16 and ATCC 25611 and Porphyromonas gingivalis strains ATCC 33277, 381 and W83. Viscosity of the enriched trypticase soy broth was measured as a control. Bars indicate standard deviations. *P < 0.05.
Yamanaka et al. BMC Infectious Diseases 2011 11:228 doi:10.1186/1471-2334-11-228