Shigella (image) Max-Planck-Gesellschaft Caption This image shows syringes isolated from Shigella flexneri. Adding soluble needle protein leads to a spontaneous elongation of some needles. The bar corresponds to 100 nanometres (1 nanometre corresponds to a millionth millimetre). Credit MPI for Biophysical Chemistry, Christian Goosmann, Michael Kolbe Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.