Segmented Filamentous Bacterium (SFB) Colony (image) NYU Langone Medical Center / New York University School of Medicine Share Print E-Mail Caption A little-known bacterial species called segmented filamentous bacterium, or SFB, can activate the production of specialized immune cells in mice. This scanning electron microscope image of an SFB colony shows a mass of long hair-like filaments created when the bacteria stay attached to each other after they divide. Credit Ivaylo Ivanov (Columbia University Medical Center), Dan Littman (NYU Langone Medical Center) and Doug Wei (Carl Zeiss SMT, Inc.) Usage Restrictions None Share Print E-Mail 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.